/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/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 17:13:28,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 17:13:28,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 17:13:28,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-18 17:13:28,337 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 [2022-02-18 17:13:28,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 17:13:28,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 17:13:28,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 17:13:28,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 17:13:28,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 17:13:28,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 17:13:28,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 17:13:28,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 17:13:28,353 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 17:13:28,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 17:13:28,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 17:13:28,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 17:13:28,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 17:13:28,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 17:13:28,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 17:13:28,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 17:13:28,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 17:13:28,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 17:13:28,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 17:13:28,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 17:13:28,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 17:13:28,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 17:13:28,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 17:13:28,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 17:13:28,558 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 17:13:28,559 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 17:13:28,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-02-18 17:13:28,560 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-02-18 17:13:28,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 17:13:28,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 17:13:28,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 17:13:28,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 17:13:28,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 17:13:28,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,602 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 17:13:28,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 17:13:28,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 17:13:28,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 17:13:28,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 17:13:28,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 17:13:28,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 17:13:28,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 17:13:28,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 17:13:28,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/1) ... [2022-02-18 17:13:28,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 17:13:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:28,644 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) [2022-02-18 17:13:28,662 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 [2022-02-18 17:13:28,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-18 17:13:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-18 17:13:28,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-18 17:13:28,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-18 17:13:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-18 17:13:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-18 17:13:28,673 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 17:13:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 17:13:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 17:13:28,673 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 17:13:28,711 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 17:13:28,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 17:13:28,780 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 17:13:28,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 17:13:28,790 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-18 17:13:28,792 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:13:28 BoogieIcfgContainer [2022-02-18 17:13:28,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 17:13:28,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 17:13:28,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 17:13:28,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 17:13:28,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 05:13:28" (1/2) ... [2022-02-18 17:13:28,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537d1864 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:13:28, skipping insertion in model container [2022-02-18 17:13:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:13:28" (2/2) ... [2022-02-18 17:13:28,808 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-02-18 17:13:28,812 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 17:13:28,812 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 17:13:28,812 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 17:13:28,812 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 17:13:28,852 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-18 17:13:28,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 17:13:28,894 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-18 17:13:28,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-18 17:13:28,900 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-02-18 17:13:28,941 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 17:13:28,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:28,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:28,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-02-18 17:13:28,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:28,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426627892] [2022-02-18 17:13:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:29,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:29,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426627892] [2022-02-18 17:13:29,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426627892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 17:13:29,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 17:13:29,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 17:13:29,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954633012] [2022-02-18 17:13:29,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 17:13:29,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 17:13:29,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 17:13:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 17:13:29,088 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:29,121 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-02-18 17:13:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 17:13:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 17:13:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:29,129 INFO L225 Difference]: With dead ends: 104 [2022-02-18 17:13:29,129 INFO L226 Difference]: Without dead ends: 87 [2022-02-18 17:13:29,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 17:13:29,132 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:29,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 17:13:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-18 17:13:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-02-18 17:13:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-02-18 17:13:29,173 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-02-18 17:13:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-02-18 17:13:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-02-18 17:13:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 17:13:29,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:29,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:29,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 17:13:29,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-02-18 17:13:29,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:29,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550408427] [2022-02-18 17:13:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:29,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:29,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550408427] [2022-02-18 17:13:29,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550408427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 17:13:29,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 17:13:29,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 17:13:29,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088076746] [2022-02-18 17:13:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 17:13:29,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 17:13:29,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 17:13:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 17:13:29,254 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:29,290 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-02-18 17:13:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 17:13:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 17:13:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:29,292 INFO L225 Difference]: With dead ends: 91 [2022-02-18 17:13:29,292 INFO L226 Difference]: Without dead ends: 83 [2022-02-18 17:13:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 17:13:29,293 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:29,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 17:13:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-18 17:13:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-18 17:13:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-02-18 17:13:29,301 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-02-18 17:13:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:29,302 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-02-18 17:13:29,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-02-18 17:13:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-18 17:13:29,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:29,303 INFO L514 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] [2022-02-18 17:13:29,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-18 17:13:29,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-02-18 17:13:29,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:29,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175734348] [2022-02-18 17:13:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:29,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:29,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175734348] [2022-02-18 17:13:29,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175734348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:29,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643429168] [2022-02-18 17:13:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:29,451 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) [2022-02-18 17:13:29,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 17:13:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-18 17:13:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:29,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-18 17:13:29,710 INFO L387 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 11 treesize of output 7 [2022-02-18 17:13:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:29,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:29,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:29,837 INFO L387 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 15 treesize of output 19 [2022-02-18 17:13:29,884 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:29,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643429168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:29,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:29,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-02-18 17:13:29,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989236523] [2022-02-18 17:13:29,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-18 17:13:29,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-18 17:13:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-18 17:13:29,934 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) 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) [2022-02-18 17:13:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:30,028 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-02-18 17:13:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 17:13:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) 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 23 [2022-02-18 17:13:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:30,032 INFO L225 Difference]: With dead ends: 154 [2022-02-18 17:13:30,032 INFO L226 Difference]: Without dead ends: 137 [2022-02-18 17:13:30,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-18 17:13:30,037 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:30,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 17:13:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-18 17:13:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-02-18 17:13:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-02-18 17:13:30,064 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-02-18 17:13:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:30,065 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-02-18 17:13:30,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) 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) [2022-02-18 17:13:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-02-18 17:13:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-18 17:13:30,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:30,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:30,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-18 17:13:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:30,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-02-18 17:13:30,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:30,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776031531] [2022-02-18 17:13:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:30,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:30,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776031531] [2022-02-18 17:13:30,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776031531] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:30,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446850228] [2022-02-18 17:13:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:13:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:30,330 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) [2022-02-18 17:13:30,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 17:13:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:13:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-18 17:13:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:30,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:30,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446850228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:30,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:30,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-18 17:13:30,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301420134] [2022-02-18 17:13:30,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 17:13:30,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 17:13:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-18 17:13:30,463 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2022-02-18 17:13:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:30,524 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-02-18 17:13:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 17:13:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-18 17:13:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:30,525 INFO L225 Difference]: With dead ends: 284 [2022-02-18 17:13:30,526 INFO L226 Difference]: Without dead ends: 264 [2022-02-18 17:13:30,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-02-18 17:13:30,526 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:30,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 17:13:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-18 17:13:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-02-18 17:13:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-02-18 17:13:30,552 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-02-18 17:13:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:30,552 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-02-18 17:13:30,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2022-02-18 17:13:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-02-18 17:13:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:30,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:30,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:30,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-18 17:13:30,754 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-02-18 17:13:30,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:30,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618415765] [2022-02-18 17:13:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:31,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:31,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618415765] [2022-02-18 17:13:31,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618415765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:31,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815207563] [2022-02-18 17:13:31,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:13:31,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:31,164 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) [2022-02-18 17:13:31,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 17:13:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:13:31,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:13:31,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:31,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:31,417 INFO L387 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 29 treesize of output 27 [2022-02-18 17:13:31,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:31,624 INFO L387 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 20 treesize of output 38 [2022-02-18 17:13:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:31,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:32,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:32,458 INFO L387 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 31 treesize of output 45 [2022-02-18 17:13:32,513 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:32,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815207563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:32,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:32,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-18 17:13:32,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062606897] [2022-02-18 17:13:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:32,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:13:32,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:13:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:13:32,556 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:33,322 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-02-18 17:13:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-18 17:13:33,323 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:33,325 INFO L225 Difference]: With dead ends: 536 [2022-02-18 17:13:33,325 INFO L226 Difference]: Without dead ends: 533 [2022-02-18 17:13:33,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-02-18 17:13:33,327 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:33,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-02-18 17:13:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-18 17:13:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-02-18 17:13:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-02-18 17:13:33,338 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-02-18 17:13:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:33,338 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-02-18 17:13:33,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-02-18 17:13:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:33,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:33,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:33,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:33,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-02-18 17:13:33,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:33,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424130136] [2022-02-18 17:13:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:33,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:33,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424130136] [2022-02-18 17:13:33,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424130136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:33,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135843477] [2022-02-18 17:13:33,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:13:33,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:33,848 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) [2022-02-18 17:13:33,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 17:13:33,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:13:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:33,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:34,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:34,042 INFO L387 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 29 treesize of output 27 [2022-02-18 17:13:34,193 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:13:34,193 INFO L387 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 22 treesize of output 10 [2022-02-18 17:13:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:34,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:34,430 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:34,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:34,564 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:34,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135843477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:34,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:34,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-18 17:13:34,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197806555] [2022-02-18 17:13:34,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:34,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-18 17:13:34,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-18 17:13:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-18 17:13:34,602 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:35,195 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-02-18 17:13:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 17:13:35,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:35,198 INFO L225 Difference]: With dead ends: 546 [2022-02-18 17:13:35,198 INFO L226 Difference]: Without dead ends: 529 [2022-02-18 17:13:35,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-02-18 17:13:35,199 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:35,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-02-18 17:13:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-18 17:13:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-02-18 17:13:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-02-18 17:13:35,207 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-02-18 17:13:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:35,207 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-02-18 17:13:35,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-02-18 17:13:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:35,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:35,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:35,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:35,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:35,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-02-18 17:13:35,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:35,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367295463] [2022-02-18 17:13:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:13:35,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:35,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367295463] [2022-02-18 17:13:35,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367295463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:35,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711237807] [2022-02-18 17:13:35,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:13:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:35,651 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) [2022-02-18 17:13:35,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 17:13:35,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:13:35,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:35,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:35,988 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:36,091 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:36,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:36,362 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:36,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:13:36,462 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:36,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711237807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:36,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:36,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-18 17:13:36,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522407746] [2022-02-18 17:13:36,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:36,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:13:36,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:13:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:13:36,497 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:36,694 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-02-18 17:13:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 17:13:36,695 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:36,697 INFO L225 Difference]: With dead ends: 554 [2022-02-18 17:13:36,697 INFO L226 Difference]: Without dead ends: 527 [2022-02-18 17:13:36,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 17:13:36,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:36,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-02-18 17:13:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-02-18 17:13:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-02-18 17:13:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-02-18 17:13:36,705 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-02-18 17:13:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:36,705 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-02-18 17:13:36,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-02-18 17:13:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:36,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:36,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:36,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:36,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:36,922 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-02-18 17:13:36,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:36,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131246384] [2022-02-18 17:13:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:13:37,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:37,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131246384] [2022-02-18 17:13:37,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131246384] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:37,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303120312] [2022-02-18 17:13:37,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:13:37,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:37,137 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) [2022-02-18 17:13:37,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 17:13:37,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:13:37,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:37,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:37,449 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:37,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:37,504 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:37,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:37,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:37,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:13:37,852 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:37,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303120312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:37,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:37,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-18 17:13:37,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196726962] [2022-02-18 17:13:37,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:37,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:13:37,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:13:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:13:37,888 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:38,060 INFO L93 Difference]: Finished difference Result 639 states and 1386 transitions. [2022-02-18 17:13:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-18 17:13:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:38,063 INFO L225 Difference]: With dead ends: 639 [2022-02-18 17:13:38,063 INFO L226 Difference]: Without dead ends: 607 [2022-02-18 17:13:38,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 17:13:38,063 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:38,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2022-02-18 17:13:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-18 17:13:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 324. [2022-02-18 17:13:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1393188854489162) internal successors, (691), 323 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 691 transitions. [2022-02-18 17:13:38,070 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 691 transitions. Word has length 32 [2022-02-18 17:13:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:38,070 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 691 transitions. [2022-02-18 17:13:38,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 691 transitions. [2022-02-18 17:13:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:38,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:38,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:38,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:38,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:38,293 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796233, now seen corresponding path program 7 times [2022-02-18 17:13:38,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:38,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457694506] [2022-02-18 17:13:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:13:38,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:38,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457694506] [2022-02-18 17:13:38,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457694506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:38,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443048193] [2022-02-18 17:13:38,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:13:38,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:38,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:38,502 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) [2022-02-18 17:13:38,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 17:13:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:38,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:38,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:38,817 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:38,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:38,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:38,874 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:38,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:39,160 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:39,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:39,258 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:39,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443048193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:39,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:39,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-18 17:13:39,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462234195] [2022-02-18 17:13:39,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:39,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:13:39,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:13:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:13:39,291 INFO L87 Difference]: Start difference. First operand 324 states and 691 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:39,484 INFO L93 Difference]: Finished difference Result 572 states and 1216 transitions. [2022-02-18 17:13:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 17:13:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:39,486 INFO L225 Difference]: With dead ends: 572 [2022-02-18 17:13:39,486 INFO L226 Difference]: Without dead ends: 548 [2022-02-18 17:13:39,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 17:13:39,487 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:39,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-02-18 17:13:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-18 17:13:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2022-02-18 17:13:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.1581632653061225) internal successors, (846), 392 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 846 transitions. [2022-02-18 17:13:39,494 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 846 transitions. Word has length 32 [2022-02-18 17:13:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:39,495 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 846 transitions. [2022-02-18 17:13:39,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 846 transitions. [2022-02-18 17:13:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:39,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:39,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:39,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-18 17:13:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:39,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1369686285, now seen corresponding path program 8 times [2022-02-18 17:13:39,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:39,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819390821] [2022-02-18 17:13:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:39,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:13:39,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:39,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819390821] [2022-02-18 17:13:39,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819390821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:39,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130069250] [2022-02-18 17:13:39,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:13:39,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:39,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:39,904 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) [2022-02-18 17:13:39,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 17:13:39,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:13:39,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:40,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:40,205 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:40,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:40,252 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:40,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:40,525 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:40,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:40,601 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:40,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130069250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:40,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:40,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-02-18 17:13:40,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567153681] [2022-02-18 17:13:40,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:40,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:13:40,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:13:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:13:40,639 INFO L87 Difference]: Start difference. First operand 393 states and 846 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:41,086 INFO L93 Difference]: Finished difference Result 743 states and 1622 transitions. [2022-02-18 17:13:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 17:13:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:41,090 INFO L225 Difference]: With dead ends: 743 [2022-02-18 17:13:41,090 INFO L226 Difference]: Without dead ends: 716 [2022-02-18 17:13:41,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 17:13:41,091 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:41,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 182 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 453 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-02-18 17:13:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-18 17:13:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 426. [2022-02-18 17:13:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1788235294117646) internal successors, (926), 425 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 926 transitions. [2022-02-18 17:13:41,102 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 926 transitions. Word has length 32 [2022-02-18 17:13:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:41,102 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 926 transitions. [2022-02-18 17:13:41,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 926 transitions. [2022-02-18 17:13:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:41,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:41,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:41,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-18 17:13:41,319 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,SelfDestructingSolverStorable9 [2022-02-18 17:13:41,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 9 times [2022-02-18 17:13:41,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:41,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943550912] [2022-02-18 17:13:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:41,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:41,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943550912] [2022-02-18 17:13:41,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943550912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:41,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540437628] [2022-02-18 17:13:41,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:13:41,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:41,531 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) [2022-02-18 17:13:41,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 17:13:41,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:13:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:41,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:41,813 INFO L387 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 22 treesize of output 22 [2022-02-18 17:13:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:42,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:42,080 INFO L387 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 18 treesize of output 26 [2022-02-18 17:13:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:42,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:43,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:43,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:43,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:43,476 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-02-18 17:13:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:43,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540437628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:43,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:43,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-02-18 17:13:43,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351546654] [2022-02-18 17:13:43,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:43,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-18 17:13:43,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-18 17:13:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:13:43,554 INFO L87 Difference]: Start difference. First operand 426 states and 926 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:45,743 INFO L93 Difference]: Finished difference Result 1367 states and 2897 transitions. [2022-02-18 17:13:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-18 17:13:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:45,747 INFO L225 Difference]: With dead ends: 1367 [2022-02-18 17:13:45,747 INFO L226 Difference]: Without dead ends: 1312 [2022-02-18 17:13:45,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1210, Invalid=6800, Unknown=0, NotChecked=0, Total=8010 [2022-02-18 17:13:45,749 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:45,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 396 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 903 Invalid, 0 Unknown, 749 Unchecked, 0.4s Time] [2022-02-18 17:13:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-02-18 17:13:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 562. [2022-02-18 17:13:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.229946524064171) internal successors, (1251), 561 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1251 transitions. [2022-02-18 17:13:45,760 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1251 transitions. Word has length 32 [2022-02-18 17:13:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:45,761 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1251 transitions. [2022-02-18 17:13:45,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1251 transitions. [2022-02-18 17:13:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:45,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:45,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:45,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:45,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:45,975 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 10 times [2022-02-18 17:13:45,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:45,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28172400] [2022-02-18 17:13:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:45,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:46,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:46,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28172400] [2022-02-18 17:13:46,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28172400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:46,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514004486] [2022-02-18 17:13:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:13:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:46,172 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) [2022-02-18 17:13:46,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 17:13:46,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:13:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:46,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:46,441 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:46,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:46,520 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:46,775 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:46,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:46,863 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:46,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514004486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:46,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:46,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:13:46,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792370217] [2022-02-18 17:13:46,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:46,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:13:46,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:13:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:13:46,910 INFO L87 Difference]: Start difference. First operand 562 states and 1251 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:47,123 INFO L93 Difference]: Finished difference Result 669 states and 1470 transitions. [2022-02-18 17:13:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-18 17:13:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:47,125 INFO L225 Difference]: With dead ends: 669 [2022-02-18 17:13:47,125 INFO L226 Difference]: Without dead ends: 652 [2022-02-18 17:13:47,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:13:47,126 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:47,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-02-18 17:13:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-02-18 17:13:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 584. [2022-02-18 17:13:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2315608919382504) internal successors, (1301), 583 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1301 transitions. [2022-02-18 17:13:47,135 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1301 transitions. Word has length 32 [2022-02-18 17:13:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:47,135 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1301 transitions. [2022-02-18 17:13:47,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1301 transitions. [2022-02-18 17:13:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:47,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:47,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:47,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:47,352 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,SelfDestructingSolverStorable11 [2022-02-18 17:13:47,353 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 112614937, now seen corresponding path program 11 times [2022-02-18 17:13:47,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:47,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253473294] [2022-02-18 17:13:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:47,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:47,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253473294] [2022-02-18 17:13:47,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253473294] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:47,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587304591] [2022-02-18 17:13:47,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:13:47,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:47,535 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) [2022-02-18 17:13:47,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 17:13:47,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:13:47,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:47,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:47,815 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:47,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:47,897 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:47,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:48,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:48,174 INFO L387 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 33 treesize of output 57 [2022-02-18 17:13:48,285 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:48,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587304591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:48,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:48,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2022-02-18 17:13:48,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509652844] [2022-02-18 17:13:48,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:13:48,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:13:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:13:48,370 INFO L87 Difference]: Start difference. First operand 584 states and 1301 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:48,734 INFO L93 Difference]: Finished difference Result 969 states and 2149 transitions. [2022-02-18 17:13:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 17:13:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:48,737 INFO L225 Difference]: With dead ends: 969 [2022-02-18 17:13:48,737 INFO L226 Difference]: Without dead ends: 944 [2022-02-18 17:13:48,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:13:48,738 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:48,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 322 Unchecked, 0.1s Time] [2022-02-18 17:13:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-02-18 17:13:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 655. [2022-02-18 17:13:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.2370030581039755) internal successors, (1463), 654 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1463 transitions. [2022-02-18 17:13:48,749 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1463 transitions. Word has length 32 [2022-02-18 17:13:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:48,749 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1463 transitions. [2022-02-18 17:13:48,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1463 transitions. [2022-02-18 17:13:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:48,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:48,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:48,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:48,963 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,SelfDestructingSolverStorable12 [2022-02-18 17:13:48,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash -708561801, now seen corresponding path program 12 times [2022-02-18 17:13:48,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:48,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238812751] [2022-02-18 17:13:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:49,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:49,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238812751] [2022-02-18 17:13:49,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238812751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:49,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551340552] [2022-02-18 17:13:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:13:49,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:49,159 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) [2022-02-18 17:13:49,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 17:13:49,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:13:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:49,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:49,420 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:49,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:49,495 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:49,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:49,765 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:49,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:13:49,872 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:49,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551340552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:49,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:49,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:13:49,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764184747] [2022-02-18 17:13:49,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:49,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:13:49,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:13:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:13:49,900 INFO L87 Difference]: Start difference. First operand 655 states and 1463 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:50,077 INFO L93 Difference]: Finished difference Result 715 states and 1583 transitions. [2022-02-18 17:13:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 17:13:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:50,080 INFO L225 Difference]: With dead ends: 715 [2022-02-18 17:13:50,080 INFO L226 Difference]: Without dead ends: 707 [2022-02-18 17:13:50,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:13:50,080 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:50,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-02-18 17:13:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-02-18 17:13:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2022-02-18 17:13:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.2305433186490453) internal successors, (1519), 681 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1519 transitions. [2022-02-18 17:13:50,089 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1519 transitions. Word has length 32 [2022-02-18 17:13:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:50,089 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1519 transitions. [2022-02-18 17:13:50,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1519 transitions. [2022-02-18 17:13:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:50,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:50,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:50,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:50,303 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,SelfDestructingSolverStorable13 [2022-02-18 17:13:50,303 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 306961723, now seen corresponding path program 13 times [2022-02-18 17:13:50,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:50,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621350589] [2022-02-18 17:13:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:50,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:50,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621350589] [2022-02-18 17:13:50,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621350589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:50,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170186402] [2022-02-18 17:13:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:13:50,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:50,521 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) [2022-02-18 17:13:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 17:13:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:50,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:50,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:50,797 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:50,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:50,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:50,870 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:50,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:51,140 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:51,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:51,206 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:51,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170186402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:51,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:51,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-02-18 17:13:51,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026646115] [2022-02-18 17:13:51,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:51,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:13:51,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:51,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:13:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:13:51,237 INFO L87 Difference]: Start difference. First operand 682 states and 1519 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:51,858 INFO L93 Difference]: Finished difference Result 1476 states and 3239 transitions. [2022-02-18 17:13:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-18 17:13:51,859 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:51,871 INFO L225 Difference]: With dead ends: 1476 [2022-02-18 17:13:51,871 INFO L226 Difference]: Without dead ends: 1322 [2022-02-18 17:13:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 17:13:51,872 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 252 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:51,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 349 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 530 Invalid, 0 Unknown, 467 Unchecked, 0.2s Time] [2022-02-18 17:13:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-02-18 17:13:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 843. [2022-02-18 17:13:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.2422802850356294) internal successors, (1888), 842 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1888 transitions. [2022-02-18 17:13:51,886 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1888 transitions. Word has length 32 [2022-02-18 17:13:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:51,886 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1888 transitions. [2022-02-18 17:13:51,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1888 transitions. [2022-02-18 17:13:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:51,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:51,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:51,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:52,103 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,SelfDestructingSolverStorable14 [2022-02-18 17:13:52,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1366997859, now seen corresponding path program 14 times [2022-02-18 17:13:52,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:52,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618090417] [2022-02-18 17:13:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:52,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:52,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618090417] [2022-02-18 17:13:52,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618090417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:52,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476768582] [2022-02-18 17:13:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:13:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:52,291 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) [2022-02-18 17:13:52,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 17:13:52,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:13:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:52,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:52,546 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:52,615 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:52,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:52,871 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:52,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:52,935 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:52,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476768582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:52,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:52,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-02-18 17:13:52,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836820554] [2022-02-18 17:13:52,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:52,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:13:52,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:13:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:13:52,974 INFO L87 Difference]: Start difference. First operand 843 states and 1888 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:53,587 INFO L93 Difference]: Finished difference Result 1446 states and 3193 transitions. [2022-02-18 17:13:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-18 17:13:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:53,591 INFO L225 Difference]: With dead ends: 1446 [2022-02-18 17:13:53,591 INFO L226 Difference]: Without dead ends: 1352 [2022-02-18 17:13:53,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2022-02-18 17:13:53,592 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:53,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 247 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 409 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-02-18 17:13:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-02-18 17:13:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1008. [2022-02-18 17:13:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.266137040714995) internal successors, (2282), 1007 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2282 transitions. [2022-02-18 17:13:53,607 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2282 transitions. Word has length 32 [2022-02-18 17:13:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:53,608 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2282 transitions. [2022-02-18 17:13:53,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2282 transitions. [2022-02-18 17:13:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:53,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:53,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:53,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:53,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:53,827 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2106792699, now seen corresponding path program 15 times [2022-02-18 17:13:53,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:53,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312193186] [2022-02-18 17:13:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:54,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:54,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312193186] [2022-02-18 17:13:54,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312193186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:54,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785598482] [2022-02-18 17:13:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:13:54,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:54,043 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) [2022-02-18 17:13:54,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 17:13:54,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:13:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-18 17:13:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:54,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:54,319 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:54,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:54,401 INFO L387 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 20 treesize of output 28 [2022-02-18 17:13:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:54,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:55,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:55,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:55,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:55,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:55,081 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-18 17:13:55,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-02-18 17:13:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:55,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785598482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:55,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:55,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-02-18 17:13:55,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803882403] [2022-02-18 17:13:55,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:55,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-18 17:13:55,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-18 17:13:55,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 17:13:55,294 INFO L87 Difference]: Start difference. First operand 1008 states and 2282 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:55,974 INFO L93 Difference]: Finished difference Result 1235 states and 2744 transitions. [2022-02-18 17:13:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-18 17:13:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:55,977 INFO L225 Difference]: With dead ends: 1235 [2022-02-18 17:13:55,977 INFO L226 Difference]: Without dead ends: 1214 [2022-02-18 17:13:55,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-02-18 17:13:55,979 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:55,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 215 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 311 Unchecked, 0.0s Time] [2022-02-18 17:13:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-02-18 17:13:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1080. [2022-02-18 17:13:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.2567191844300276) internal successors, (2435), 1079 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2435 transitions. [2022-02-18 17:13:55,993 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2435 transitions. Word has length 32 [2022-02-18 17:13:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 2435 transitions. [2022-02-18 17:13:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2435 transitions. [2022-02-18 17:13:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:55,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:55,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:56,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-18 17:13:56,207 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,SelfDestructingSolverStorable16 [2022-02-18 17:13:56,207 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash 78448107, now seen corresponding path program 16 times [2022-02-18 17:13:56,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:56,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089334835] [2022-02-18 17:13:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:56,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:56,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089334835] [2022-02-18 17:13:56,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089334835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:56,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442335807] [2022-02-18 17:13:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:13:56,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:56,420 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) [2022-02-18 17:13:56,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 17:13:56,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:13:56,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:13:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:56,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:56,674 INFO L387 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 26 treesize of output 26 [2022-02-18 17:13:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:56,788 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:13:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:56,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:57,083 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:57,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:13:57,200 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:57,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442335807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:57,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:57,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-02-18 17:13:57,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709203175] [2022-02-18 17:13:57,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:57,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:13:57,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:13:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:13:57,231 INFO L87 Difference]: Start difference. First operand 1080 states and 2435 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:57,448 INFO L93 Difference]: Finished difference Result 1216 states and 2718 transitions. [2022-02-18 17:13:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 17:13:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:57,452 INFO L225 Difference]: With dead ends: 1216 [2022-02-18 17:13:57,452 INFO L226 Difference]: Without dead ends: 1204 [2022-02-18 17:13:57,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:13:57,455 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:57,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 125 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-02-18 17:13:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-02-18 17:13:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1083. [2022-02-18 17:13:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.253234750462107) internal successors, (2438), 1082 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2438 transitions. [2022-02-18 17:13:57,477 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2438 transitions. Word has length 32 [2022-02-18 17:13:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2438 transitions. [2022-02-18 17:13:57,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2438 transitions. [2022-02-18 17:13:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:57,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:57,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:57,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-18 17:13:57,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-18 17:13:57,679 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:57,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1563537433, now seen corresponding path program 17 times [2022-02-18 17:13:57,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:57,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711216317] [2022-02-18 17:13:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:57,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:57,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711216317] [2022-02-18 17:13:57,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711216317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:57,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671126784] [2022-02-18 17:13:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:13:57,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:57,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:57,867 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) [2022-02-18 17:13:57,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 17:13:57,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:13:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:58,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:58,108 INFO L387 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 24 treesize of output 24 [2022-02-18 17:13:58,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:58,219 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:58,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:58,450 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:58,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:13:58,584 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:58,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671126784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:58,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:58,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-02-18 17:13:58,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117894578] [2022-02-18 17:13:58,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:58,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:13:58,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:13:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:13:58,616 INFO L87 Difference]: Start difference. First operand 1083 states and 2438 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:13:58,815 INFO L93 Difference]: Finished difference Result 1155 states and 2591 transitions. [2022-02-18 17:13:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 17:13:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:13:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:13:58,818 INFO L225 Difference]: With dead ends: 1155 [2022-02-18 17:13:58,818 INFO L226 Difference]: Without dead ends: 1141 [2022-02-18 17:13:58,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:13:58,819 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:13:58,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-02-18 17:13:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-02-18 17:13:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1086. [2022-02-18 17:13:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.249769585253456) internal successors, (2441), 1085 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) [2022-02-18 17:13:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2441 transitions. [2022-02-18 17:13:58,843 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2441 transitions. Word has length 32 [2022-02-18 17:13:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:13:58,844 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2441 transitions. [2022-02-18 17:13:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:13:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2441 transitions. [2022-02-18 17:13:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:13:58,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:13:58,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:13:58,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-18 17:13:59,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:59,060 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:13:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:13:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 18 times [2022-02-18 17:13:59,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:13:59,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330939617] [2022-02-18 17:13:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:13:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:13:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:13:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:59,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:13:59,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330939617] [2022-02-18 17:13:59,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330939617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:13:59,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307089587] [2022-02-18 17:13:59,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:13:59,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:13:59,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:13:59,257 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) [2022-02-18 17:13:59,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 17:13:59,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:13:59,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:13:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:13:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:13:59,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:13:59,456 INFO L387 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 29 treesize of output 27 [2022-02-18 17:13:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:13:59,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:13:59,614 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:13:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:59,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:13:59,854 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:13:59,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:13:59,938 INFO L387 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 17 treesize of output 13 [2022-02-18 17:13:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:13:59,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307089587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:13:59,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:13:59,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:13:59,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094055027] [2022-02-18 17:13:59,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:13:59,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:13:59,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:13:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:13:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:13:59,969 INFO L87 Difference]: Start difference. First operand 1086 states and 2441 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:00,248 INFO L93 Difference]: Finished difference Result 1287 states and 2865 transitions. [2022-02-18 17:14:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 17:14:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:00,251 INFO L225 Difference]: With dead ends: 1287 [2022-02-18 17:14:00,251 INFO L226 Difference]: Without dead ends: 1267 [2022-02-18 17:14:00,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:14:00,252 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:00,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-02-18 17:14:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-18 17:14:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1147. [2022-02-18 17:14:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.244328097731239) internal successors, (2572), 1146 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2572 transitions. [2022-02-18 17:14:00,267 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2572 transitions. Word has length 32 [2022-02-18 17:14:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:00,267 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 2572 transitions. [2022-02-18 17:14:00,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2572 transitions. [2022-02-18 17:14:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:00,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:00,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:00,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:00,469 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1976105177, now seen corresponding path program 19 times [2022-02-18 17:14:00,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:00,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774923016] [2022-02-18 17:14:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:00,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:00,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774923016] [2022-02-18 17:14:00,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774923016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:00,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737642880] [2022-02-18 17:14:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:00,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:00,650 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) [2022-02-18 17:14:00,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 17:14:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:00,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:00,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:00,852 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:00,995 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:01,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:01,246 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:01,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:01,330 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:01,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737642880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:01,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:01,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:14:01,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344934088] [2022-02-18 17:14:01,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:01,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:01,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:01,364 INFO L87 Difference]: Start difference. First operand 1147 states and 2572 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:01,590 INFO L93 Difference]: Finished difference Result 1262 states and 2801 transitions. [2022-02-18 17:14:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-18 17:14:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:01,594 INFO L225 Difference]: With dead ends: 1262 [2022-02-18 17:14:01,594 INFO L226 Difference]: Without dead ends: 1236 [2022-02-18 17:14:01,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:14:01,594 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:01,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-02-18 17:14:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-02-18 17:14:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1157. [2022-02-18 17:14:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2422145328719725) internal successors, (2592), 1156 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2592 transitions. [2022-02-18 17:14:01,608 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2592 transitions. Word has length 32 [2022-02-18 17:14:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:01,608 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2592 transitions. [2022-02-18 17:14:01,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2592 transitions. [2022-02-18 17:14:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:01,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:01,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:01,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:01,823 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash -516998149, now seen corresponding path program 20 times [2022-02-18 17:14:01,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:01,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877828142] [2022-02-18 17:14:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:02,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:02,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877828142] [2022-02-18 17:14:02,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877828142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:02,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515006984] [2022-02-18 17:14:02,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:02,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:02,016 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) [2022-02-18 17:14:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 17:14:02,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:02,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:02,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:02,229 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:02,341 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:02,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:02,585 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:02,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:02,675 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:02,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515006984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:02,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:02,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:14:02,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546575914] [2022-02-18 17:14:02,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:02,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:02,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:02,705 INFO L87 Difference]: Start difference. First operand 1157 states and 2592 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:02,952 INFO L93 Difference]: Finished difference Result 1281 states and 2850 transitions. [2022-02-18 17:14:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 17:14:02,953 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:02,956 INFO L225 Difference]: With dead ends: 1281 [2022-02-18 17:14:02,957 INFO L226 Difference]: Without dead ends: 1260 [2022-02-18 17:14:02,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 17:14:02,957 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:02,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 307 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-02-18 17:14:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-02-18 17:14:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1165. [2022-02-18 17:14:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.2448453608247423) internal successors, (2613), 1164 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2613 transitions. [2022-02-18 17:14:02,971 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2613 transitions. Word has length 32 [2022-02-18 17:14:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:02,971 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2613 transitions. [2022-02-18 17:14:02,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2613 transitions. [2022-02-18 17:14:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:02,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:02,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:02,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:03,189 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,SelfDestructingSolverStorable21 [2022-02-18 17:14:03,190 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash 495694383, now seen corresponding path program 21 times [2022-02-18 17:14:03,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:03,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514526766] [2022-02-18 17:14:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:03,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:03,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514526766] [2022-02-18 17:14:03,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514526766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:03,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589160547] [2022-02-18 17:14:03,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:03,370 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) [2022-02-18 17:14:03,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 17:14:03,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:03,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:03,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:03,585 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:03,697 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:03,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:03,952 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:03,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:04,038 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:04,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589160547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:04,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:04,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-18 17:14:04,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806972573] [2022-02-18 17:14:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:04,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:04,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:04,079 INFO L87 Difference]: Start difference. First operand 1165 states and 2613 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:04,336 INFO L93 Difference]: Finished difference Result 1292 states and 2864 transitions. [2022-02-18 17:14:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 17:14:04,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:04,340 INFO L225 Difference]: With dead ends: 1292 [2022-02-18 17:14:04,340 INFO L226 Difference]: Without dead ends: 1268 [2022-02-18 17:14:04,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:14:04,340 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:04,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-02-18 17:14:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-02-18 17:14:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1176. [2022-02-18 17:14:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.244255319148936) internal successors, (2637), 1175 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2637 transitions. [2022-02-18 17:14:04,354 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2637 transitions. Word has length 32 [2022-02-18 17:14:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:04,354 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2637 transitions. [2022-02-18 17:14:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2637 transitions. [2022-02-18 17:14:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:04,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:04,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:04,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:04,571 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,SelfDestructingSolverStorable22 [2022-02-18 17:14:04,571 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash -956375147, now seen corresponding path program 22 times [2022-02-18 17:14:04,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:04,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138895320] [2022-02-18 17:14:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:04,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:04,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138895320] [2022-02-18 17:14:04,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138895320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:04,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240383547] [2022-02-18 17:14:04,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:14:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:04,765 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) [2022-02-18 17:14:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 17:14:04,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:14:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:04,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:04,973 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:05,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:05,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:05,081 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:05,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:05,350 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:05,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:05,451 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:05,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240383547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:05,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:05,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 31 [2022-02-18 17:14:05,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504096288] [2022-02-18 17:14:05,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:05,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-18 17:14:05,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-18 17:14:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-02-18 17:14:05,483 INFO L87 Difference]: Start difference. First operand 1176 states and 2637 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:05,788 INFO L93 Difference]: Finished difference Result 1465 states and 3217 transitions. [2022-02-18 17:14:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-18 17:14:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:05,792 INFO L225 Difference]: With dead ends: 1465 [2022-02-18 17:14:05,792 INFO L226 Difference]: Without dead ends: 1415 [2022-02-18 17:14:05,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 17:14:05,796 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:05,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-02-18 17:14:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-02-18 17:14:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1212. [2022-02-18 17:14:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.255986787778695) internal successors, (2732), 1211 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2732 transitions. [2022-02-18 17:14:05,813 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2732 transitions. Word has length 32 [2022-02-18 17:14:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:05,813 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2732 transitions. [2022-02-18 17:14:05,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2732 transitions. [2022-02-18 17:14:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:05,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:05,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:05,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-18 17:14:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:06,031 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1996610945, now seen corresponding path program 23 times [2022-02-18 17:14:06,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:06,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128562773] [2022-02-18 17:14:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:06,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:06,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:06,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128562773] [2022-02-18 17:14:06,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128562773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:06,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968782313] [2022-02-18 17:14:06,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:14:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:06,217 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) [2022-02-18 17:14:06,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 17:14:06,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:14:06,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:06,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:06,452 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:06,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:06,576 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:06,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:06,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:06,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:06,846 INFO L387 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 33 treesize of output 57 [2022-02-18 17:14:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:07,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968782313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:07,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:07,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 36 [2022-02-18 17:14:07,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412901041] [2022-02-18 17:14:07,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:07,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-18 17:14:07,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-18 17:14:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 17:14:07,038 INFO L87 Difference]: Start difference. First operand 1212 states and 2732 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:08,573 INFO L93 Difference]: Finished difference Result 2662 states and 5786 transitions. [2022-02-18 17:14:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-18 17:14:08,573 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:08,577 INFO L225 Difference]: With dead ends: 2662 [2022-02-18 17:14:08,577 INFO L226 Difference]: Without dead ends: 2469 [2022-02-18 17:14:08,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1014, Invalid=5628, Unknown=0, NotChecked=0, Total=6642 [2022-02-18 17:14:08,578 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:08,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 379 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 922 Invalid, 0 Unknown, 416 Unchecked, 0.4s Time] [2022-02-18 17:14:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-02-18 17:14:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1440. [2022-02-18 17:14:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.244614315496873) internal successors, (3230), 1439 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3230 transitions. [2022-02-18 17:14:08,600 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3230 transitions. Word has length 32 [2022-02-18 17:14:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:08,600 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3230 transitions. [2022-02-18 17:14:08,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3230 transitions. [2022-02-18 17:14:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:08,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:08,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:08,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-18 17:14:08,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:08,818 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:08,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1401532203, now seen corresponding path program 24 times [2022-02-18 17:14:08,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:08,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591838569] [2022-02-18 17:14:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:08,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:08,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591838569] [2022-02-18 17:14:08,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591838569] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:08,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482319531] [2022-02-18 17:14:08,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:14:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:08,990 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) [2022-02-18 17:14:08,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 17:14:09,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:14:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:09,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:09,197 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:09,347 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:09,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:09,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:09,668 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:09,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482319531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:09,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:09,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-02-18 17:14:09,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54327889] [2022-02-18 17:14:09,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:09,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:09,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:09,700 INFO L87 Difference]: Start difference. First operand 1440 states and 3230 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:09,960 INFO L93 Difference]: Finished difference Result 1680 states and 3724 transitions. [2022-02-18 17:14:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-18 17:14:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:09,963 INFO L225 Difference]: With dead ends: 1680 [2022-02-18 17:14:09,963 INFO L226 Difference]: Without dead ends: 1666 [2022-02-18 17:14:09,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 17:14:09,963 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:09,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-02-18 17:14:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-02-18 17:14:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1487. [2022-02-18 17:14:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.2476446837146704) internal successors, (3340), 1486 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3340 transitions. [2022-02-18 17:14:09,979 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3340 transitions. Word has length 32 [2022-02-18 17:14:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:09,979 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 3340 transitions. [2022-02-18 17:14:09,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3340 transitions. [2022-02-18 17:14:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:09,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:09,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:09,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-18 17:14:10,188 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,SelfDestructingSolverStorable25 [2022-02-18 17:14:10,188 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 809339119, now seen corresponding path program 25 times [2022-02-18 17:14:10,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:10,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254979002] [2022-02-18 17:14:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:10,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:10,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254979002] [2022-02-18 17:14:10,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254979002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:10,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272921864] [2022-02-18 17:14:10,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:10,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:10,367 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) [2022-02-18 17:14:10,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 17:14:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:10,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:10,598 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:10,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:10,738 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:10,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:10,971 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:10,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:11,036 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:11,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272921864] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:11,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:11,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-02-18 17:14:11,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995211626] [2022-02-18 17:14:11,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:11,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:11,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:11,073 INFO L87 Difference]: Start difference. First operand 1487 states and 3340 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:11,383 INFO L93 Difference]: Finished difference Result 1626 states and 3621 transitions. [2022-02-18 17:14:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 17:14:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:11,385 INFO L225 Difference]: With dead ends: 1626 [2022-02-18 17:14:11,385 INFO L226 Difference]: Without dead ends: 1610 [2022-02-18 17:14:11,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 17:14:11,386 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:11,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-02-18 17:14:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-02-18 17:14:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1486. [2022-02-18 17:14:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.2471380471380473) internal successors, (3337), 1485 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3337 transitions. [2022-02-18 17:14:11,402 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3337 transitions. Word has length 32 [2022-02-18 17:14:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:11,402 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 3337 transitions. [2022-02-18 17:14:11,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3337 transitions. [2022-02-18 17:14:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:11,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:11,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:11,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:11,604 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,SelfDestructingSolverStorable26 [2022-02-18 17:14:11,604 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1602633313, now seen corresponding path program 26 times [2022-02-18 17:14:11,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:11,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091913935] [2022-02-18 17:14:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:11,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:11,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091913935] [2022-02-18 17:14:11,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091913935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:11,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377265424] [2022-02-18 17:14:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:11,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:11,806 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) [2022-02-18 17:14:11,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 17:14:11,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:11,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:12,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:12,063 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:12,178 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:12,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:12,410 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:12,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:12,478 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:12,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377265424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:12,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:12,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-02-18 17:14:12,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169791056] [2022-02-18 17:14:12,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:12,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:12,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:12,510 INFO L87 Difference]: Start difference. First operand 1486 states and 3337 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:12,731 INFO L93 Difference]: Finished difference Result 1659 states and 3686 transitions. [2022-02-18 17:14:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 17:14:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:12,734 INFO L225 Difference]: With dead ends: 1659 [2022-02-18 17:14:12,734 INFO L226 Difference]: Without dead ends: 1645 [2022-02-18 17:14:12,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:14:12,735 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:12,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-02-18 17:14:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-02-18 17:14:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1494. [2022-02-18 17:14:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.245813797722706) internal successors, (3353), 1493 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3353 transitions. [2022-02-18 17:14:12,761 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3353 transitions. Word has length 32 [2022-02-18 17:14:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:12,761 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 3353 transitions. [2022-02-18 17:14:12,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3353 transitions. [2022-02-18 17:14:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:12,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:12,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:12,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-18 17:14:12,963 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,SelfDestructingSolverStorable27 [2022-02-18 17:14:12,963 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -117543987, now seen corresponding path program 27 times [2022-02-18 17:14:12,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:12,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835185287] [2022-02-18 17:14:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:13,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:13,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835185287] [2022-02-18 17:14:13,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835185287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:13,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201343491] [2022-02-18 17:14:13,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:13,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:13,170 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) [2022-02-18 17:14:13,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 17:14:13,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:13,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:13,401 INFO L387 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 24 treesize of output 24 [2022-02-18 17:14:13,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:13,492 INFO L387 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 20 treesize of output 38 [2022-02-18 17:14:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:13,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:14,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:14,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-02-18 17:14:14,878 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:14,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201343491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:14,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:14,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-02-18 17:14:14,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142282383] [2022-02-18 17:14:14,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:14,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-18 17:14:14,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-18 17:14:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:14:14,909 INFO L87 Difference]: Start difference. First operand 1494 states and 3353 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:15,315 INFO L93 Difference]: Finished difference Result 1596 states and 3554 transitions. [2022-02-18 17:14:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-18 17:14:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:15,318 INFO L225 Difference]: With dead ends: 1596 [2022-02-18 17:14:15,318 INFO L226 Difference]: Without dead ends: 1563 [2022-02-18 17:14:15,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2022-02-18 17:14:15,319 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:15,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 433 Unchecked, 0.1s Time] [2022-02-18 17:14:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-02-18 17:14:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1505. [2022-02-18 17:14:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.2513297872340425) internal successors, (3386), 1504 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3386 transitions. [2022-02-18 17:14:15,335 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3386 transitions. Word has length 32 [2022-02-18 17:14:15,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:15,335 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3386 transitions. [2022-02-18 17:14:15,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3386 transitions. [2022-02-18 17:14:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:15,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:15,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:15,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-18 17:14:15,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-18 17:14:15,552 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 28 times [2022-02-18 17:14:15,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:15,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174863178] [2022-02-18 17:14:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:14:15,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:15,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174863178] [2022-02-18 17:14:15,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174863178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:15,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501229590] [2022-02-18 17:14:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:14:15,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:15,719 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) [2022-02-18 17:14:15,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-18 17:14:15,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:14:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:15,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:15,986 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:16,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:16,073 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:16,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:16,346 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:16,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:16,469 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:16,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501229590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:16,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:16,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-18 17:14:16,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850505862] [2022-02-18 17:14:16,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:16,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:16,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:16,501 INFO L87 Difference]: Start difference. First operand 1505 states and 3386 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:16,737 INFO L93 Difference]: Finished difference Result 1850 states and 4103 transitions. [2022-02-18 17:14:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-18 17:14:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:16,740 INFO L225 Difference]: With dead ends: 1850 [2022-02-18 17:14:16,740 INFO L226 Difference]: Without dead ends: 1756 [2022-02-18 17:14:16,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:14:16,741 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:16,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 234 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-02-18 17:14:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-02-18 17:14:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1578. [2022-02-18 17:14:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.25428027901078) internal successors, (3555), 1577 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3555 transitions. [2022-02-18 17:14:16,758 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3555 transitions. Word has length 32 [2022-02-18 17:14:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:16,759 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3555 transitions. [2022-02-18 17:14:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3555 transitions. [2022-02-18 17:14:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:16,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:16,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:16,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:16,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:16,970 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 968255547, now seen corresponding path program 29 times [2022-02-18 17:14:16,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:16,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764577031] [2022-02-18 17:14:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:14:17,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:17,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764577031] [2022-02-18 17:14:17,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764577031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:17,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846052833] [2022-02-18 17:14:17,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:14:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:17,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:17,133 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) [2022-02-18 17:14:17,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-18 17:14:17,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:14:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:17,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:17,389 INFO L387 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 24 treesize of output 24 [2022-02-18 17:14:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:17,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:17,440 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:17,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:17,705 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:17,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:17,796 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:17,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846052833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:17,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:17,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-18 17:14:17,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27956149] [2022-02-18 17:14:17,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:17,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:17,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:17,827 INFO L87 Difference]: Start difference. First operand 1578 states and 3555 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:18,067 INFO L93 Difference]: Finished difference Result 2252 states and 4991 transitions. [2022-02-18 17:14:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-18 17:14:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:18,070 INFO L225 Difference]: With dead ends: 2252 [2022-02-18 17:14:18,070 INFO L226 Difference]: Without dead ends: 2140 [2022-02-18 17:14:18,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 17:14:18,071 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:18,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 240 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-02-18 17:14:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-02-18 17:14:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1707. [2022-02-18 17:14:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 2.2626025791324738) internal successors, (3860), 1706 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 3860 transitions. [2022-02-18 17:14:18,099 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 3860 transitions. Word has length 32 [2022-02-18 17:14:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:18,099 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 3860 transitions. [2022-02-18 17:14:18,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 3860 transitions. [2022-02-18 17:14:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:18,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:18,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:18,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:18,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:18,318 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1980948079, now seen corresponding path program 30 times [2022-02-18 17:14:18,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:18,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731040846] [2022-02-18 17:14:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:14:18,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:18,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731040846] [2022-02-18 17:14:18,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731040846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:18,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018544128] [2022-02-18 17:14:18,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:14:18,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:18,482 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) [2022-02-18 17:14:18,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-18 17:14:18,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:14:18,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:18,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:18,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:18,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:18,765 INFO L387 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 24 treesize of output 24 [2022-02-18 17:14:18,803 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-18 17:14:18,804 INFO L387 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 22 treesize of output 10 [2022-02-18 17:14:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:18,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:19,082 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:19,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:19,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018544128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:19,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:19,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-02-18 17:14:19,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786109366] [2022-02-18 17:14:19,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-18 17:14:19,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-18 17:14:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 17:14:19,220 INFO L87 Difference]: Start difference. First operand 1707 states and 3860 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:19,813 INFO L93 Difference]: Finished difference Result 2522 states and 5549 transitions. [2022-02-18 17:14:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-18 17:14:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:19,817 INFO L225 Difference]: With dead ends: 2522 [2022-02-18 17:14:19,817 INFO L226 Difference]: Without dead ends: 2400 [2022-02-18 17:14:19,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-02-18 17:14:19,818 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 248 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:19,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 203 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 471 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-02-18 17:14:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-02-18 17:14:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1538. [2022-02-18 17:14:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.2485361093038385) internal successors, (3456), 1537 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3456 transitions. [2022-02-18 17:14:19,840 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3456 transitions. Word has length 32 [2022-02-18 17:14:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:19,840 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 3456 transitions. [2022-02-18 17:14:19,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3456 transitions. [2022-02-18 17:14:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:19,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:19,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:20,055 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,SelfDestructingSolverStorable31 [2022-02-18 17:14:20,055 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 31 times [2022-02-18 17:14:20,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:20,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812008238] [2022-02-18 17:14:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:20,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:20,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812008238] [2022-02-18 17:14:20,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812008238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:20,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708188836] [2022-02-18 17:14:20,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:20,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:20,240 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) [2022-02-18 17:14:20,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-18 17:14:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:20,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:20,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:20,499 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:20,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:20,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:20,617 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:20,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:20,881 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:20,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:21,057 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:21,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708188836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:21,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:21,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:21,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835906992] [2022-02-18 17:14:21,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:21,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:21,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:21,090 INFO L87 Difference]: Start difference. First operand 1538 states and 3456 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:22,059 INFO L93 Difference]: Finished difference Result 2813 states and 6181 transitions. [2022-02-18 17:14:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-18 17:14:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:22,063 INFO L225 Difference]: With dead ends: 2813 [2022-02-18 17:14:22,063 INFO L226 Difference]: Without dead ends: 2550 [2022-02-18 17:14:22,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-02-18 17:14:22,063 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 288 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:22,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 439 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 629 Invalid, 0 Unknown, 1159 Unchecked, 0.3s Time] [2022-02-18 17:14:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-02-18 17:14:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1860. [2022-02-18 17:14:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 2.2501344809037116) internal successors, (4183), 1859 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 4183 transitions. [2022-02-18 17:14:22,087 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 4183 transitions. Word has length 32 [2022-02-18 17:14:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:22,087 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 4183 transitions. [2022-02-18 17:14:22,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 4183 transitions. [2022-02-18 17:14:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:22,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:22,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:22,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-18 17:14:22,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:22,290 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash 282445069, now seen corresponding path program 32 times [2022-02-18 17:14:22,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:22,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923203883] [2022-02-18 17:14:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:22,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:22,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:22,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923203883] [2022-02-18 17:14:22,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923203883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:22,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209999044] [2022-02-18 17:14:22,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:22,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:22,456 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) [2022-02-18 17:14:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-18 17:14:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:22,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:22,746 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:22,856 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:22,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:23,100 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:23,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:23,248 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:23,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209999044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:23,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:23,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:23,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936786510] [2022-02-18 17:14:23,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:23,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:23,279 INFO L87 Difference]: Start difference. First operand 1860 states and 4183 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:23,752 INFO L93 Difference]: Finished difference Result 2130 states and 4721 transitions. [2022-02-18 17:14:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-18 17:14:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:23,755 INFO L225 Difference]: With dead ends: 2130 [2022-02-18 17:14:23,755 INFO L226 Difference]: Without dead ends: 2102 [2022-02-18 17:14:23,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 17:14:23,756 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:23,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2022-02-18 17:14:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-02-18 17:14:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1894. [2022-02-18 17:14:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.2519809825673534) internal successors, (4263), 1893 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 4263 transitions. [2022-02-18 17:14:23,780 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 4263 transitions. Word has length 32 [2022-02-18 17:14:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 4263 transitions. [2022-02-18 17:14:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 4263 transitions. [2022-02-18 17:14:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:23,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:23,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:23,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:23,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:23,983 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash 458576657, now seen corresponding path program 33 times [2022-02-18 17:14:23,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:23,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794624114] [2022-02-18 17:14:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:24,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:24,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794624114] [2022-02-18 17:14:24,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794624114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:24,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541980591] [2022-02-18 17:14:24,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:24,259 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) [2022-02-18 17:14:24,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-18 17:14:24,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:24,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:24,505 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:24,582 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:24,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:24,822 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:24,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:24,912 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541980591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:24,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:24,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:24,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616638199] [2022-02-18 17:14:24,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:24,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:24,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:24,944 INFO L87 Difference]: Start difference. First operand 1894 states and 4263 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:25,616 INFO L93 Difference]: Finished difference Result 2381 states and 5316 transitions. [2022-02-18 17:14:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-18 17:14:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:25,619 INFO L225 Difference]: With dead ends: 2381 [2022-02-18 17:14:25,619 INFO L226 Difference]: Without dead ends: 2304 [2022-02-18 17:14:25,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 17:14:25,619 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:25,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 268 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 409 Invalid, 0 Unknown, 444 Unchecked, 0.2s Time] [2022-02-18 17:14:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-02-18 17:14:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2022. [2022-02-18 17:14:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.256308758040574) internal successors, (4560), 2021 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4560 transitions. [2022-02-18 17:14:25,640 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4560 transitions. Word has length 32 [2022-02-18 17:14:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:25,640 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4560 transitions. [2022-02-18 17:14:25,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4560 transitions. [2022-02-18 17:14:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:25,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:25,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:25,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:25,858 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,SelfDestructingSolverStorable34 [2022-02-18 17:14:25,859 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -362600081, now seen corresponding path program 34 times [2022-02-18 17:14:25,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:25,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737811490] [2022-02-18 17:14:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:26,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737811490] [2022-02-18 17:14:26,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737811490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:26,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027856114] [2022-02-18 17:14:26,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:14:26,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:26,055 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) [2022-02-18 17:14:26,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-18 17:14:26,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:14:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:26,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:26,306 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:26,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:26,391 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:26,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:26,641 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:26,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:26,751 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:26,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027856114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:26,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:26,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:26,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458445289] [2022-02-18 17:14:26,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:26,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:26,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:26,781 INFO L87 Difference]: Start difference. First operand 2022 states and 4560 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:27,147 INFO L93 Difference]: Finished difference Result 2174 states and 4888 transitions. [2022-02-18 17:14:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-18 17:14:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:27,149 INFO L225 Difference]: With dead ends: 2174 [2022-02-18 17:14:27,149 INFO L226 Difference]: Without dead ends: 2154 [2022-02-18 17:14:27,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 17:14:27,150 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 326 Unchecked, 0.1s Time] [2022-02-18 17:14:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-02-18 17:14:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2043. [2022-02-18 17:14:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.254162585700294) internal successors, (4603), 2042 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 4603 transitions. [2022-02-18 17:14:27,171 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 4603 transitions. Word has length 32 [2022-02-18 17:14:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:27,171 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 4603 transitions. [2022-02-18 17:14:27,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 4603 transitions. [2022-02-18 17:14:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:27,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:27,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:27,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:27,389 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,SelfDestructingSolverStorable35 [2022-02-18 17:14:27,389 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1350073971, now seen corresponding path program 35 times [2022-02-18 17:14:27,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:27,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506420602] [2022-02-18 17:14:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:27,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:27,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506420602] [2022-02-18 17:14:27,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506420602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:27,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212981398] [2022-02-18 17:14:27,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:14:27,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:27,585 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) [2022-02-18 17:14:27,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-18 17:14:27,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:14:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:27,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:27,847 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:28,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:28,007 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:28,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:28,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:28,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:28,270 INFO L387 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 33 treesize of output 57 [2022-02-18 17:14:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:28,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212981398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:28,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:28,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-02-18 17:14:28,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296158112] [2022-02-18 17:14:28,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:28,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-18 17:14:28,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-18 17:14:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 17:14:28,469 INFO L87 Difference]: Start difference. First operand 2043 states and 4603 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:29,364 INFO L93 Difference]: Finished difference Result 2682 states and 5975 transitions. [2022-02-18 17:14:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-18 17:14:29,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:29,368 INFO L225 Difference]: With dead ends: 2682 [2022-02-18 17:14:29,368 INFO L226 Difference]: Without dead ends: 2649 [2022-02-18 17:14:29,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=650, Invalid=3132, Unknown=0, NotChecked=0, Total=3782 [2022-02-18 17:14:29,369 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:29,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 216 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 536 Invalid, 0 Unknown, 521 Unchecked, 0.2s Time] [2022-02-18 17:14:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-02-18 17:14:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2201. [2022-02-18 17:14:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.255) internal successors, (4961), 2200 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 4961 transitions. [2022-02-18 17:14:29,398 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 4961 transitions. Word has length 32 [2022-02-18 17:14:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:29,398 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 4961 transitions. [2022-02-18 17:14:29,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 4961 transitions. [2022-02-18 17:14:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:29,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:29,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:29,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:29,607 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,SelfDestructingSolverStorable36 [2022-02-18 17:14:29,607 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1516422259, now seen corresponding path program 36 times [2022-02-18 17:14:29,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:29,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245493615] [2022-02-18 17:14:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:29,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:29,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245493615] [2022-02-18 17:14:29,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245493615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:29,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593846661] [2022-02-18 17:14:29,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:14:29,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:29,791 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) [2022-02-18 17:14:29,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-18 17:14:29,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:14:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:30,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:30,010 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:30,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:30,195 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:30,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:30,457 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:30,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:30,562 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:30,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593846661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:30,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:30,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:30,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496984485] [2022-02-18 17:14:30,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:30,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:30,593 INFO L87 Difference]: Start difference. First operand 2201 states and 4961 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:31,050 INFO L93 Difference]: Finished difference Result 2948 states and 6539 transitions. [2022-02-18 17:14:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 17:14:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:31,054 INFO L225 Difference]: With dead ends: 2948 [2022-02-18 17:14:31,054 INFO L226 Difference]: Without dead ends: 2823 [2022-02-18 17:14:31,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-02-18 17:14:31,055 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:31,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 316 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 423 Invalid, 0 Unknown, 725 Unchecked, 0.2s Time] [2022-02-18 17:14:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-02-18 17:14:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2454. [2022-02-18 17:14:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 2.2592743579290664) internal successors, (5542), 2453 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 5542 transitions. [2022-02-18 17:14:31,083 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 5542 transitions. Word has length 32 [2022-02-18 17:14:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:31,083 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 5542 transitions. [2022-02-18 17:14:31,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 5542 transitions. [2022-02-18 17:14:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:31,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:31,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:31,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-18 17:14:31,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:31,307 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1972305753, now seen corresponding path program 37 times [2022-02-18 17:14:31,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:31,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434607867] [2022-02-18 17:14:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:31,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:31,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434607867] [2022-02-18 17:14:31,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434607867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:31,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363570827] [2022-02-18 17:14:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:31,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:31,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:31,496 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) [2022-02-18 17:14:31,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-18 17:14:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:31,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:31,706 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:31,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:31,861 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:31,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:32,106 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:32,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:32,217 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:32,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363570827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:32,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:32,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:32,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874261894] [2022-02-18 17:14:32,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:32,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:32,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:32,249 INFO L87 Difference]: Start difference. First operand 2454 states and 5542 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:32,609 INFO L93 Difference]: Finished difference Result 4067 states and 9106 transitions. [2022-02-18 17:14:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 17:14:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:32,616 INFO L225 Difference]: With dead ends: 4067 [2022-02-18 17:14:32,616 INFO L226 Difference]: Without dead ends: 4040 [2022-02-18 17:14:32,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 17:14:32,616 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:32,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 385 Unchecked, 0.1s Time] [2022-02-18 17:14:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-02-18 17:14:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 2635. [2022-02-18 17:14:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.2649962034927866) internal successors, (5966), 2634 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 5966 transitions. [2022-02-18 17:14:32,648 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 5966 transitions. Word has length 32 [2022-02-18 17:14:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:32,649 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 5966 transitions. [2022-02-18 17:14:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 5966 transitions. [2022-02-18 17:14:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:32,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:32,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:32,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:32,864 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,SelfDestructingSolverStorable38 [2022-02-18 17:14:32,864 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash 804520611, now seen corresponding path program 38 times [2022-02-18 17:14:32,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:32,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519541821] [2022-02-18 17:14:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:32,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:33,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:33,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519541821] [2022-02-18 17:14:33,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519541821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:33,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108780084] [2022-02-18 17:14:33,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:33,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:33,044 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) [2022-02-18 17:14:33,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-18 17:14:33,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:33,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:33,251 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:33,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:33,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:33,387 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:33,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:33,642 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:33,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:33,753 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:33,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108780084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:33,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:33,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:33,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336853063] [2022-02-18 17:14:33,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:33,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:33,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:33,784 INFO L87 Difference]: Start difference. First operand 2635 states and 5966 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:34,166 INFO L93 Difference]: Finished difference Result 3211 states and 7172 transitions. [2022-02-18 17:14:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 17:14:34,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:34,170 INFO L225 Difference]: With dead ends: 3211 [2022-02-18 17:14:34,170 INFO L226 Difference]: Without dead ends: 3145 [2022-02-18 17:14:34,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 17:14:34,171 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:34,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 341 Invalid, 0 Unknown, 617 Unchecked, 0.1s Time] [2022-02-18 17:14:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-02-18 17:14:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2696. [2022-02-18 17:14:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2608534322820035) internal successors, (6093), 2695 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6093 transitions. [2022-02-18 17:14:34,200 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6093 transitions. Word has length 32 [2022-02-18 17:14:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:34,201 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6093 transitions. [2022-02-18 17:14:34,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6093 transitions. [2022-02-18 17:14:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:34,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:34,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:34,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:34,420 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,SelfDestructingSolverStorable39 [2022-02-18 17:14:34,420 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 349061555, now seen corresponding path program 39 times [2022-02-18 17:14:34,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:34,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774937011] [2022-02-18 17:14:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:34,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:34,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774937011] [2022-02-18 17:14:34,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774937011] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:34,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759017472] [2022-02-18 17:14:34,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:34,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:34,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:34,619 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) [2022-02-18 17:14:34,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-18 17:14:34,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-18 17:14:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:34,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:34,885 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:35,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:35,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:35,057 INFO L387 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 20 treesize of output 28 [2022-02-18 17:14:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:35,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:35,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:35,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:35,712 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-02-18 17:14:35,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:35,873 INFO L387 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 47 treesize of output 45 [2022-02-18 17:14:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:36,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759017472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:36,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:36,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-02-18 17:14:36,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941975416] [2022-02-18 17:14:36,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:36,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-18 17:14:36,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-18 17:14:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 17:14:36,016 INFO L87 Difference]: Start difference. First operand 2696 states and 6093 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:37,614 INFO L93 Difference]: Finished difference Result 3668 states and 8214 transitions. [2022-02-18 17:14:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-18 17:14:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:37,619 INFO L225 Difference]: With dead ends: 3668 [2022-02-18 17:14:37,619 INFO L226 Difference]: Without dead ends: 3548 [2022-02-18 17:14:37,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1004, Invalid=5002, Unknown=0, NotChecked=0, Total=6006 [2022-02-18 17:14:37,620 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:37,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 603 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 313 Invalid, 0 Unknown, 1145 Unchecked, 0.1s Time] [2022-02-18 17:14:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-02-18 17:14:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2929. [2022-02-18 17:14:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 2.2575136612021858) internal successors, (6610), 2928 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 6610 transitions. [2022-02-18 17:14:37,656 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 6610 transitions. Word has length 32 [2022-02-18 17:14:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:37,656 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 6610 transitions. [2022-02-18 17:14:37,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 6610 transitions. [2022-02-18 17:14:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:37,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:37,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:37,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-18 17:14:37,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:37,875 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2145543437, now seen corresponding path program 40 times [2022-02-18 17:14:37,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:37,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911965476] [2022-02-18 17:14:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:37,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:38,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:38,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911965476] [2022-02-18 17:14:38,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911965476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:38,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187779428] [2022-02-18 17:14:38,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:14:38,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:38,052 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) [2022-02-18 17:14:38,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-18 17:14:38,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:14:38,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:38,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:38,262 INFO L387 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 31 treesize of output 29 [2022-02-18 17:14:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:38,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:38,423 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:38,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:38,669 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:38,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:38,816 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:38,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187779428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:38,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:38,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:38,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271914185] [2022-02-18 17:14:38,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:38,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:38,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:38,848 INFO L87 Difference]: Start difference. First operand 2929 states and 6610 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:39,399 INFO L93 Difference]: Finished difference Result 4509 states and 10100 transitions. [2022-02-18 17:14:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 17:14:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:39,405 INFO L225 Difference]: With dead ends: 4509 [2022-02-18 17:14:39,405 INFO L226 Difference]: Without dead ends: 4467 [2022-02-18 17:14:39,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:14:39,406 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:39,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 296 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 514 Unchecked, 0.2s Time] [2022-02-18 17:14:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-02-18 17:14:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3295. [2022-02-18 17:14:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.2726168791742563) internal successors, (7486), 3294 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 7486 transitions. [2022-02-18 17:14:39,454 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 7486 transitions. Word has length 32 [2022-02-18 17:14:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:39,454 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 7486 transitions. [2022-02-18 17:14:39,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 7486 transitions. [2022-02-18 17:14:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:39,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:39,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:39,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-18 17:14:39,658 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,SelfDestructingSolverStorable41 [2022-02-18 17:14:39,658 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1639171119, now seen corresponding path program 41 times [2022-02-18 17:14:39,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:39,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237260581] [2022-02-18 17:14:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:39,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:39,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237260581] [2022-02-18 17:14:39,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237260581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:39,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763668862] [2022-02-18 17:14:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:14:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:39,853 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) [2022-02-18 17:14:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-18 17:14:39,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:14:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:40,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:40,109 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:40,263 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:40,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:40,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:40,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:40,528 INFO L387 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 33 treesize of output 57 [2022-02-18 17:14:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:40,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763668862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:40,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:40,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-02-18 17:14:40,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967790793] [2022-02-18 17:14:40,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:40,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-18 17:14:40,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-18 17:14:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:14:40,855 INFO L87 Difference]: Start difference. First operand 3295 states and 7486 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:42,066 INFO L93 Difference]: Finished difference Result 5882 states and 13176 transitions. [2022-02-18 17:14:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-18 17:14:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:42,073 INFO L225 Difference]: With dead ends: 5882 [2022-02-18 17:14:42,073 INFO L226 Difference]: Without dead ends: 5674 [2022-02-18 17:14:42,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=4389, Unknown=0, NotChecked=0, Total=5256 [2022-02-18 17:14:42,074 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:42,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 390 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 719 Invalid, 0 Unknown, 517 Unchecked, 0.3s Time] [2022-02-18 17:14:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-02-18 17:14:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3749. [2022-02-18 17:14:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 2.2716115261472787) internal successors, (8514), 3748 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 8514 transitions. [2022-02-18 17:14:42,123 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 8514 transitions. Word has length 32 [2022-02-18 17:14:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:42,123 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 8514 transitions. [2022-02-18 17:14:42,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 8514 transitions. [2022-02-18 17:14:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:42,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:42,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:42,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-18 17:14:42,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:42,343 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:42,343 INFO L85 PathProgramCache]: Analyzing trace with hash 251124075, now seen corresponding path program 42 times [2022-02-18 17:14:42,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:42,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454636348] [2022-02-18 17:14:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:42,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:42,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:42,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454636348] [2022-02-18 17:14:42,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454636348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:42,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154708160] [2022-02-18 17:14:42,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:14:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:42,521 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) [2022-02-18 17:14:42,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-18 17:14:42,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:14:42,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:42,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:42,728 INFO L387 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 29 treesize of output 27 [2022-02-18 17:14:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:42,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:42,898 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:42,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:43,133 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:43,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-18 17:14:43,254 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:43,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154708160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:43,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:43,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 28 [2022-02-18 17:14:43,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127038101] [2022-02-18 17:14:43,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:43,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 17:14:43,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 17:14:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-02-18 17:14:43,285 INFO L87 Difference]: Start difference. First operand 3749 states and 8514 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:43,475 INFO L93 Difference]: Finished difference Result 4320 states and 9774 transitions. [2022-02-18 17:14:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 17:14:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:43,481 INFO L225 Difference]: With dead ends: 4320 [2022-02-18 17:14:43,481 INFO L226 Difference]: Without dead ends: 4280 [2022-02-18 17:14:43,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 17:14:43,482 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:43,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 197 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-02-18 17:14:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-02-18 17:14:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3804. [2022-02-18 17:14:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.2713647120694187) internal successors, (8638), 3803 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 8638 transitions. [2022-02-18 17:14:43,529 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 8638 transitions. Word has length 32 [2022-02-18 17:14:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:43,529 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 8638 transitions. [2022-02-18 17:14:43,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 8638 transitions. [2022-02-18 17:14:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:43,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:43,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:43,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:43,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:43,734 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1453373471, now seen corresponding path program 43 times [2022-02-18 17:14:43,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:43,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262429698] [2022-02-18 17:14:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:43,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:43,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:43,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262429698] [2022-02-18 17:14:43,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262429698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:43,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159720324] [2022-02-18 17:14:43,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:43,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:43,922 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) [2022-02-18 17:14:43,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-18 17:14:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:44,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:44,184 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:44,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:44,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:44,299 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:44,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:44,546 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:44,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:44,720 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:44,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159720324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:44,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:44,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-02-18 17:14:44,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835530279] [2022-02-18 17:14:44,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:44,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-18 17:14:44,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-18 17:14:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-18 17:14:44,753 INFO L87 Difference]: Start difference. First operand 3804 states and 8638 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:45,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:45,138 INFO L93 Difference]: Finished difference Result 4154 states and 9383 transitions. [2022-02-18 17:14:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 17:14:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:45,143 INFO L225 Difference]: With dead ends: 4154 [2022-02-18 17:14:45,143 INFO L226 Difference]: Without dead ends: 4143 [2022-02-18 17:14:45,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 17:14:45,144 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:45,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 182 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 314 Unchecked, 0.1s Time] [2022-02-18 17:14:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-02-18 17:14:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3797. [2022-02-18 17:14:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.2710748155953637) internal successors, (8621), 3796 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 8621 transitions. [2022-02-18 17:14:45,186 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 8621 transitions. Word has length 32 [2022-02-18 17:14:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:45,186 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 8621 transitions. [2022-02-18 17:14:45,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 8621 transitions. [2022-02-18 17:14:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:45,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:45,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:45,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-18 17:14:45,390 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,SelfDestructingSolverStorable44 [2022-02-18 17:14:45,391 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash -62131981, now seen corresponding path program 44 times [2022-02-18 17:14:45,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:45,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538520641] [2022-02-18 17:14:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:45,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:45,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:45,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538520641] [2022-02-18 17:14:45,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538520641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:45,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652192565] [2022-02-18 17:14:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:45,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:45,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:45,601 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) [2022-02-18 17:14:45,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:45,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-18 17:14:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:45,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:45,864 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:46,009 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:46,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:46,259 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:46,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:46,417 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:46,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652192565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:46,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:46,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:46,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546858849] [2022-02-18 17:14:46,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:46,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:46,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:46,449 INFO L87 Difference]: Start difference. First operand 3797 states and 8621 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:47,140 INFO L93 Difference]: Finished difference Result 4560 states and 10241 transitions. [2022-02-18 17:14:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-18 17:14:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:47,145 INFO L225 Difference]: With dead ends: 4560 [2022-02-18 17:14:47,145 INFO L226 Difference]: Without dead ends: 4520 [2022-02-18 17:14:47,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-02-18 17:14:47,146 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:47,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 263 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 545 Unchecked, 0.1s Time] [2022-02-18 17:14:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-02-18 17:14:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3870. [2022-02-18 17:14:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.271387955544068) internal successors, (8788), 3869 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 8788 transitions. [2022-02-18 17:14:47,186 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 8788 transitions. Word has length 32 [2022-02-18 17:14:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:47,186 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 8788 transitions. [2022-02-18 17:14:47,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 8788 transitions. [2022-02-18 17:14:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:47,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:47,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:47,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-18 17:14:47,391 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,SelfDestructingSolverStorable45 [2022-02-18 17:14:47,391 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1842733581, now seen corresponding path program 45 times [2022-02-18 17:14:47,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:47,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70609242] [2022-02-18 17:14:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:47,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:47,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:47,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70609242] [2022-02-18 17:14:47,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70609242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:47,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384028080] [2022-02-18 17:14:47,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:47,606 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-18 17:14:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-18 17:14:47,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:47,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:47,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:47,848 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:47,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:47,929 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:47,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:48,189 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:48,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:48,385 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:48,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384028080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:48,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:48,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:48,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730869535] [2022-02-18 17:14:48,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:48,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:48,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:48,417 INFO L87 Difference]: Start difference. First operand 3870 states and 8788 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:48,928 INFO L93 Difference]: Finished difference Result 5581 states and 12529 transitions. [2022-02-18 17:14:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-18 17:14:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:48,935 INFO L225 Difference]: With dead ends: 5581 [2022-02-18 17:14:48,936 INFO L226 Difference]: Without dead ends: 5455 [2022-02-18 17:14:48,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2022-02-18 17:14:48,939 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 286 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-02-18 17:14:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-02-18 17:14:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3920. [2022-02-18 17:14:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 2.2702219954069918) internal successors, (8897), 3919 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 8897 transitions. [2022-02-18 17:14:49,009 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 8897 transitions. Word has length 32 [2022-02-18 17:14:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:49,009 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 8897 transitions. [2022-02-18 17:14:49,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 8897 transitions. [2022-02-18 17:14:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:49,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:49,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:49,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:49,213 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,SelfDestructingSolverStorable46 [2022-02-18 17:14:49,215 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 778274133, now seen corresponding path program 46 times [2022-02-18 17:14:49,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:49,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000622445] [2022-02-18 17:14:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:49,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:49,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000622445] [2022-02-18 17:14:49,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000622445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:49,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680035907] [2022-02-18 17:14:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 17:14:49,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:49,399 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) [2022-02-18 17:14:49,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-18 17:14:49,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 17:14:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:49,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:49,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:49,669 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:49,751 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:50,003 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:50,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:50,187 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:50,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680035907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:50,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:50,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:50,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978586387] [2022-02-18 17:14:50,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:50,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:50,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:50,218 INFO L87 Difference]: Start difference. First operand 3920 states and 8897 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:50,876 INFO L93 Difference]: Finished difference Result 5422 states and 12182 transitions. [2022-02-18 17:14:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 17:14:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:50,882 INFO L225 Difference]: With dead ends: 5422 [2022-02-18 17:14:50,882 INFO L226 Difference]: Without dead ends: 5349 [2022-02-18 17:14:50,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 17:14:50,883 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:50,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 248 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-02-18 17:14:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-02-18 17:14:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4155. [2022-02-18 17:14:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 2.2708233028406357) internal successors, (9433), 4154 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 9433 transitions. [2022-02-18 17:14:50,935 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 9433 transitions. Word has length 32 [2022-02-18 17:14:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:50,935 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 9433 transitions. [2022-02-18 17:14:50,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 9433 transitions. [2022-02-18 17:14:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:50,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:50,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:50,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-18 17:14:51,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:51,139 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 388256609, now seen corresponding path program 47 times [2022-02-18 17:14:51,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:51,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897754505] [2022-02-18 17:14:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:51,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:51,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:51,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897754505] [2022-02-18 17:14:51,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897754505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:51,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942561194] [2022-02-18 17:14:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 17:14:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:51,338 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) [2022-02-18 17:14:51,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-18 17:14:51,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 17:14:51,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-18 17:14:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:51,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:51,586 INFO L387 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 24 treesize of output 24 [2022-02-18 17:14:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:51,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:51,691 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-18 17:14:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:51,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:51,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:51,942 INFO L387 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 33 treesize of output 57 [2022-02-18 17:14:52,176 INFO L387 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 35 treesize of output 31 [2022-02-18 17:14:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:52,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942561194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:52,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:52,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-02-18 17:14:52,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290001069] [2022-02-18 17:14:52,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-18 17:14:52,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-18 17:14:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 17:14:52,307 INFO L87 Difference]: Start difference. First operand 4155 states and 9433 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:52,895 INFO L93 Difference]: Finished difference Result 5217 states and 11757 transitions. [2022-02-18 17:14:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 17:14:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:52,901 INFO L225 Difference]: With dead ends: 5217 [2022-02-18 17:14:52,901 INFO L226 Difference]: Without dead ends: 5195 [2022-02-18 17:14:52,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-02-18 17:14:52,902 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:52,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 504 Unchecked, 0.1s Time] [2022-02-18 17:14:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2022-02-18 17:14:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4255. [2022-02-18 17:14:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 2.2717442407146216) internal successors, (9664), 4254 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 9664 transitions. [2022-02-18 17:14:52,959 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 9664 transitions. Word has length 32 [2022-02-18 17:14:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:52,959 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 9664 transitions. [2022-02-18 17:14:52,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 9664 transitions. [2022-02-18 17:14:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:52,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:52,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:52,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:53,178 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,SelfDestructingSolverStorable48 [2022-02-18 17:14:53,178 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:53,178 INFO L85 PathProgramCache]: Analyzing trace with hash 36126075, now seen corresponding path program 48 times [2022-02-18 17:14:53,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:53,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324478362] [2022-02-18 17:14:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:53,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:53,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:53,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324478362] [2022-02-18 17:14:53,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324478362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:53,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175618048] [2022-02-18 17:14:53,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 17:14:53,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:53,375 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) [2022-02-18 17:14:53,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 17:14:53,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:53,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-18 17:14:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:53,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:53,655 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:53,732 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:53,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:53,982 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:53,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:54,082 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:54,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175618048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:54,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:54,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:54,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535245947] [2022-02-18 17:14:54,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:54,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:54,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:54,114 INFO L87 Difference]: Start difference. First operand 4255 states and 9664 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:54,864 INFO L93 Difference]: Finished difference Result 6892 states and 15481 transitions. [2022-02-18 17:14:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 17:14:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:54,873 INFO L225 Difference]: With dead ends: 6892 [2022-02-18 17:14:54,873 INFO L226 Difference]: Without dead ends: 6717 [2022-02-18 17:14:54,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-02-18 17:14:54,874 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:54,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-02-18 17:14:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-02-18 17:14:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 4460. [2022-02-18 17:14:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.270015698587127) internal successors, (10122), 4459 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 10122 transitions. [2022-02-18 17:14:54,936 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 10122 transitions. Word has length 32 [2022-02-18 17:14:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:54,936 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 10122 transitions. [2022-02-18 17:14:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 10122 transitions. [2022-02-18 17:14:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:54,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:54,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:54,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:55,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-18 17:14:55,147 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1637833507, now seen corresponding path program 49 times [2022-02-18 17:14:55,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:55,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377422584] [2022-02-18 17:14:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:55,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:55,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377422584] [2022-02-18 17:14:55,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377422584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:55,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418850032] [2022-02-18 17:14:55,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 17:14:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:55,350 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) [2022-02-18 17:14:55,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-18 17:14:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:55,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:55,634 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:55,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:55,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:55,716 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:55,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:55,986 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:55,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:56,100 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:56,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418850032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:56,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:56,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:56,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006478773] [2022-02-18 17:14:56,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:56,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:56,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:56,132 INFO L87 Difference]: Start difference. First operand 4460 states and 10122 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:56,856 INFO L93 Difference]: Finished difference Result 6917 states and 15565 transitions. [2022-02-18 17:14:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 17:14:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:56,880 INFO L225 Difference]: With dead ends: 6917 [2022-02-18 17:14:56,880 INFO L226 Difference]: Without dead ends: 6736 [2022-02-18 17:14:56,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:14:56,880 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:56,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 329 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 688 Invalid, 0 Unknown, 515 Unchecked, 0.3s Time] [2022-02-18 17:14:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-02-18 17:14:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4336. [2022-02-18 17:14:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 2.2622837370242213) internal successors, (9807), 4335 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 9807 transitions. [2022-02-18 17:14:56,932 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 9807 transitions. Word has length 32 [2022-02-18 17:14:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:56,932 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 9807 transitions. [2022-02-18 17:14:56,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 9807 transitions. [2022-02-18 17:14:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:56,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:56,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:56,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-18 17:14:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:57,136 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash -233872393, now seen corresponding path program 50 times [2022-02-18 17:14:57,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:57,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677009896] [2022-02-18 17:14:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:57,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:57,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:57,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677009896] [2022-02-18 17:14:57,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677009896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:57,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345853399] [2022-02-18 17:14:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 17:14:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:57,317 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) [2022-02-18 17:14:57,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-18 17:14:57,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 17:14:57,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-18 17:14:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:57,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:57,559 INFO L387 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 26 treesize of output 26 [2022-02-18 17:14:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-18 17:14:57,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 17:14:57,636 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-18 17:14:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:57,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 17:14:57,889 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-18 17:14:57,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-18 17:14:58,004 INFO L387 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 17 treesize of output 13 [2022-02-18 17:14:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:58,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345853399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 17:14:58,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 17:14:58,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-02-18 17:14:58,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853001769] [2022-02-18 17:14:58,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 17:14:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-18 17:14:58,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 17:14:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-18 17:14:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-18 17:14:58,037 INFO L87 Difference]: Start difference. First operand 4336 states and 9807 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 17:14:58,686 INFO L93 Difference]: Finished difference Result 6011 states and 13443 transitions. [2022-02-18 17:14:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-18 17:14:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-18 17:14:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 17:14:58,694 INFO L225 Difference]: With dead ends: 6011 [2022-02-18 17:14:58,694 INFO L226 Difference]: Without dead ends: 5882 [2022-02-18 17:14:58,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 17:14:58,695 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 17:14:58,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 348 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 803 Unchecked, 0.2s Time] [2022-02-18 17:14:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-02-18 17:14:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4195. [2022-02-18 17:14:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.259656652360515) internal successors, (9477), 4194 states have internal predecessors, (9477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 9477 transitions. [2022-02-18 17:14:58,757 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 9477 transitions. Word has length 32 [2022-02-18 17:14:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 17:14:58,757 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 9477 transitions. [2022-02-18 17:14:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 17:14:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 9477 transitions. [2022-02-18 17:14:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-18 17:14:58,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 17:14:58,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 17:14:58,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-18 17:14:58,975 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,SelfDestructingSolverStorable51 [2022-02-18 17:14:58,975 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 17:14:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 17:14:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash -13819161, now seen corresponding path program 51 times [2022-02-18 17:14:58,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 17:14:58,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204008380] [2022-02-18 17:14:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 17:14:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 17:14:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 17:14:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 17:14:59,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 17:14:59,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204008380] [2022-02-18 17:14:59,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204008380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 17:14:59,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791214267] [2022-02-18 17:14:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 17:14:59,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:14:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 17:14:59,331 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) [2022-02-18 17:14:59,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-18 17:14:59,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 17:14:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 17:14:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-18 17:14:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 17:14:59,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:59,589 INFO L387 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 24 treesize of output 24 [2022-02-18 17:14:59,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 17:14:59,640 INFO L387 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 20 treesize of output 38 [2022-02-18 17:14:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 17:14:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-18 17:26:16,387 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-18 17:26:16,388 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-18 17:26:16,389 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 17:26:16,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-18 17:26:16,427 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 [2022-02-18 17:26:16,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 17:26:16,589 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 2ms.. [2022-02-18 17:26:16,590 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-18 17:26:16,591 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-18 17:26:16,593 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2022-02-18 17:26:16,594 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 17:26:16,594 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 17:26:16,596 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:26:16 BasicIcfg [2022-02-18 17:26:16,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 17:26:16,596 INFO L158 Benchmark]: Toolchain (without parser) took 768015.47ms. Allocated memory was 184.5MB in the beginning and 407.9MB in the end (delta: 223.3MB). Free memory was 141.9MB in the beginning and 216.0MB in the end (delta: -74.0MB). Peak memory consumption was 260.9MB. Max. memory is 8.0GB. [2022-02-18 17:26:16,596 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 17:26:16,596 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.09ms. Allocated memory is still 184.5MB. Free memory was 141.8MB in the beginning and 140.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 17:26:16,596 INFO L158 Benchmark]: Boogie Preprocessor took 13.11ms. Allocated memory is still 184.5MB. Free memory was 140.3MB in the beginning and 139.3MB in the end (delta: 921.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 17:26:16,596 INFO L158 Benchmark]: RCFGBuilder took 173.57ms. Allocated memory is still 184.5MB. Free memory was 139.2MB in the beginning and 130.0MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-18 17:26:16,596 INFO L158 Benchmark]: TraceAbstraction took 767803.22ms. Allocated memory was 184.5MB in the beginning and 407.9MB in the end (delta: 223.3MB). Free memory was 129.4MB in the beginning and 216.0MB in the end (delta: -86.5MB). Peak memory consumption was 247.3MB. Max. memory is 8.0GB. [2022-02-18 17:26:16,597 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 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.09ms. Allocated memory is still 184.5MB. Free memory was 141.8MB in the beginning and 140.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.11ms. Allocated memory is still 184.5MB. Free memory was 140.3MB in the beginning and 139.3MB in the end (delta: 921.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 173.57ms. Allocated memory is still 184.5MB. Free memory was 139.2MB in the beginning and 130.0MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 767803.22ms. Allocated memory was 184.5MB in the beginning and 407.9MB in the end (delta: 223.3MB). Free memory was 129.4MB in the beginning and 216.0MB in the end (delta: -86.5MB). Peak memory consumption was 247.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 2ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 2ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 767.7s, OverallIterations: 53, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.1s, AutomataDifference: 26.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7585 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7585 mSDsluCounter, 11898 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19136 IncrementalHoareTripleChecker+Unchecked, 16771 mSDsCounter, 1584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17660 IncrementalHoareTripleChecker+Invalid, 38380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1584 mSolverCounterUnsat, 1312 mSDtfsCounter, 17660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4938 GetRequests, 2515 SyntacticMatches, 221 SemanticMatches, 2202 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 40328 ImplicationChecksByTransitivity, 34.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4460occurred in iteration=50, InterpolantAutomatonStates: 1537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 52 MinimizatonAttempts, 26546 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 49.8s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 4638 ConstructedInterpolants, 832 QuantifiedInterpolants, 56221 SizeOfPredicates, 862 NumberOfNonLiveVariables, 3371 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1900 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