/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-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:14:47,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:14:47,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:14:47,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:14:47,291 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 [2022-03-01 18:14:47,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:14:47,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:14:47,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:14:47,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:14:47,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:14:47,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:14:47,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:14:47,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:14:47,324 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:14:47,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:14:47,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:14:47,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:14:47,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:14:47,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:14:47,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:14:47,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:14:47,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:14:47,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:14:47,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:14:47,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:14:47,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:14:47,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:14:47,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:14:47,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:14:47,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:14:47,611 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:14:47,612 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:14:47,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2022-03-01 18:14:47,613 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2022-03-01 18:14:47,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:14:47,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:14:47,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:14:47,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:14:47,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:14:47,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,659 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:14:47,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:14:47,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:14:47,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:14:47,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:14:47,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:14:47,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:14:47,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:14:47,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:14:47,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/1) ... [2022-03-01 18:14:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:14:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:47,721 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) [2022-03-01 18:14:47,744 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 [2022-03-01 18:14:47,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:14:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:14:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:14:47,762 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:14:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:14:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:14:47,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:14:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:14:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:14:47,763 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:14:47,798 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:14:47,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:14:47,909 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:14:47,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:14:47,921 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:14:47,932 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:14:47 BoogieIcfgContainer [2022-03-01 18:14:47,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:14:47,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:14:47,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:14:47,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:14:47,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:14:47" (1/2) ... [2022-03-01 18:14:47,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4013a6cc and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:14:47, skipping insertion in model container [2022-03-01 18:14:47,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:14:47" (2/2) ... [2022-03-01 18:14:47,942 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2022-03-01 18:14:47,950 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:14:47,950 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:14:47,950 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:14:47,950 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:14:47,995 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 18:14:48,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:14:48,053 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 [2022-03-01 18:14:48,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 18:14:48,064 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-01 18:14:48,085 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 18:14:48,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:48,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:48,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash 160243872, now seen corresponding path program 1 times [2022-03-01 18:14:48,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:48,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356526135] [2022-03-01 18:14:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:48,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:48,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356526135] [2022-03-01 18:14:48,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356526135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:14:48,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:14:48,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:14:48,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150453943] [2022-03-01 18:14:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:14:48,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:14:48,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:14:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:14:48,323 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-03-01 18:14:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:48,352 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-03-01 18:14:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:14:48,354 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 [2022-03-01 18:14:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:48,361 INFO L225 Difference]: With dead ends: 57 [2022-03-01 18:14:48,362 INFO L226 Difference]: Without dead ends: 50 [2022-03-01 18:14:48,363 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 [2022-03-01 18:14:48,366 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:48,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:14:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-01 18:14:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-01 18:14:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 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) [2022-03-01 18:14:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-03-01 18:14:48,401 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-03-01 18:14:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:48,402 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-03-01 18:14:48,402 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) [2022-03-01 18:14:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-03-01 18:14:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:14:48,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:48,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:14:48,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2122570142, now seen corresponding path program 1 times [2022-03-01 18:14:48,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:48,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012030050] [2022-03-01 18:14:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:48,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:48,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012030050] [2022-03-01 18:14:48,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012030050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:48,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936120928] [2022-03-01 18:14:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:48,549 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) [2022-03-01 18:14:48,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:14:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:48,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:14:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:48,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:48,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936120928] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:48,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-01 18:14:48,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-01 18:14:48,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593482309] [2022-03-01 18:14:48,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:14:48,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:14:48,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:14:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:14:48,940 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:49,048 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-03-01 18:14:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 18:14:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:14:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:49,050 INFO L225 Difference]: With dead ends: 76 [2022-03-01 18:14:49,050 INFO L226 Difference]: Without dead ends: 76 [2022-03-01 18:14:49,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:14:49,052 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:49,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:14:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-01 18:14:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-03-01 18:14:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-01 18:14:49,061 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-03-01 18:14:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:49,061 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-01 18:14:49,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-01 18:14:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:14:49,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:49,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:49,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:49,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:49,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 834689058, now seen corresponding path program 1 times [2022-03-01 18:14:49,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:49,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886478539] [2022-03-01 18:14:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:49,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886478539] [2022-03-01 18:14:49,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886478539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:14:49,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:14:49,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:14:49,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918184156] [2022-03-01 18:14:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:14:49,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:14:49,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:14:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:14:49,331 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:49,442 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-03-01 18:14:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:14:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:14:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:49,443 INFO L225 Difference]: With dead ends: 71 [2022-03-01 18:14:49,444 INFO L226 Difference]: Without dead ends: 66 [2022-03-01 18:14:49,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:49,445 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:49,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-01 18:14:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-03-01 18:14:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-03-01 18:14:49,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-03-01 18:14:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:49,452 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-03-01 18:14:49,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-03-01 18:14:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:14:49,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:49,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:49,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:14:49,454 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:49,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash -999603742, now seen corresponding path program 2 times [2022-03-01 18:14:49,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:49,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230672435] [2022-03-01 18:14:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:49,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230672435] [2022-03-01 18:14:49,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230672435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:14:49,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:14:49,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:14:49,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372909727] [2022-03-01 18:14:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:14:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:14:49,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:14:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:14:49,531 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:49,615 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-03-01 18:14:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:14:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:14:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:49,620 INFO L225 Difference]: With dead ends: 51 [2022-03-01 18:14:49,620 INFO L226 Difference]: Without dead ends: 51 [2022-03-01 18:14:49,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:49,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:49,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:14:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-01 18:14:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-03-01 18:14:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 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) [2022-03-01 18:14:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-03-01 18:14:49,629 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-03-01 18:14:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:49,629 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-03-01 18:14:49,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-03-01 18:14:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 18:14:49,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:49,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:49,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:14:49,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1331282530, now seen corresponding path program 2 times [2022-03-01 18:14:49,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:49,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451612929] [2022-03-01 18:14:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:49,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451612929] [2022-03-01 18:14:49,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451612929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:14:49,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:14:49,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:14:49,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590350999] [2022-03-01 18:14:49,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:14:49,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:14:49,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:14:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:14:49,697 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:49,764 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-03-01 18:14:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:14:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 18:14:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:49,766 INFO L225 Difference]: With dead ends: 51 [2022-03-01 18:14:49,766 INFO L226 Difference]: Without dead ends: 49 [2022-03-01 18:14:49,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:14:49,767 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:49,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:14:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-01 18:14:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-03-01 18:14:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-03-01 18:14:49,773 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-03-01 18:14:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:49,773 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-03-01 18:14:49,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-03-01 18:14:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:14:49,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:49,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:49,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:14:49,774 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1139591584, now seen corresponding path program 1 times [2022-03-01 18:14:49,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:49,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756131310] [2022-03-01 18:14:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:49,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:49,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756131310] [2022-03-01 18:14:49,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756131310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:49,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711320367] [2022-03-01 18:14:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:49,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:49,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:49,937 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) [2022-03-01 18:14:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:14:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:49,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:14:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:50,308 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-01 18:14:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:50,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:50,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:50,440 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 9 treesize of output 14 [2022-03-01 18:14:50,467 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-01 18:14:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:50,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711320367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:50,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:50,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-01 18:14:50,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688877881] [2022-03-01 18:14:50,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:50,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:14:50,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:14:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:50,521 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:50,574 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2022-03-01 18:14:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:14:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:14:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:50,576 INFO L225 Difference]: With dead ends: 84 [2022-03-01 18:14:50,576 INFO L226 Difference]: Without dead ends: 77 [2022-03-01 18:14:50,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:50,577 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:50,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-03-01 18:14:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-01 18:14:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-03-01 18:14:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 110 transitions. [2022-03-01 18:14:50,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 110 transitions. Word has length 18 [2022-03-01 18:14:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:50,583 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 110 transitions. [2022-03-01 18:14:50,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 110 transitions. [2022-03-01 18:14:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:14:50,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:50,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:50,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:50,799 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,SelfDestructingSolverStorable5 [2022-03-01 18:14:50,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2098687768, now seen corresponding path program 2 times [2022-03-01 18:14:50,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:50,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483935681] [2022-03-01 18:14:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:50,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:50,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483935681] [2022-03-01 18:14:50,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483935681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:50,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364157606] [2022-03-01 18:14:50,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:14:50,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:50,894 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) [2022-03-01 18:14:50,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:14:50,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:14:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:14:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:51,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:51,141 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-01 18:14:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:51,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:51,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:51,225 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 9 treesize of output 14 [2022-03-01 18:14:51,239 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-01 18:14:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:51,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364157606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:51,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:51,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-01 18:14:51,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436544267] [2022-03-01 18:14:51,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:51,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:14:51,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:14:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:51,288 INFO L87 Difference]: Start difference. First operand 57 states and 110 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:51,319 INFO L93 Difference]: Finished difference Result 82 states and 153 transitions. [2022-03-01 18:14:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:14:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:14:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:51,321 INFO L225 Difference]: With dead ends: 82 [2022-03-01 18:14:51,321 INFO L226 Difference]: Without dead ends: 79 [2022-03-01 18:14:51,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:51,322 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:51,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 66 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-03-01 18:14:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-01 18:14:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-03-01 18:14:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-03-01 18:14:51,334 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2022-03-01 18:14:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:51,335 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-03-01 18:14:51,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-03-01 18:14:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:14:51,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:51,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:51,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:51,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:51,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash 402122286, now seen corresponding path program 3 times [2022-03-01 18:14:51,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:51,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031974736] [2022-03-01 18:14:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:51,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:51,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031974736] [2022-03-01 18:14:51,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031974736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:51,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474634818] [2022-03-01 18:14:51,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:14:51,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:51,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:51,648 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) [2022-03-01 18:14:51,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:14:51,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:14:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:51,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:14:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:51,799 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-01 18:14:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:51,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:51,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:14:51,889 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 9 treesize of output 14 [2022-03-01 18:14:51,905 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-01 18:14:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:51,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474634818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:51,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:51,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-01 18:14:51,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59922322] [2022-03-01 18:14:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:51,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:14:51,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:14:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:51,975 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:52,022 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2022-03-01 18:14:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:14:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:14:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:52,024 INFO L225 Difference]: With dead ends: 94 [2022-03-01 18:14:52,024 INFO L226 Difference]: Without dead ends: 87 [2022-03-01 18:14:52,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:14:52,025 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:52,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:14:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-01 18:14:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-01 18:14:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2022-03-01 18:14:52,042 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2022-03-01 18:14:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:52,043 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2022-03-01 18:14:52,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2022-03-01 18:14:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:52,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:52,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:52,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:52,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:52,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2093142942, now seen corresponding path program 4 times [2022-03-01 18:14:52,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:52,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626032012] [2022-03-01 18:14:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:52,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:52,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626032012] [2022-03-01 18:14:52,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626032012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:52,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715083707] [2022-03-01 18:14:52,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:14:52,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:52,336 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) [2022-03-01 18:14:52,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:14:52,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:14:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:52,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:52,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715083707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:52,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:52,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 18:14:52,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131993894] [2022-03-01 18:14:52,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:52,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:14:52,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:14:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:14:52,593 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:53,015 INFO L93 Difference]: Finished difference Result 189 states and 352 transitions. [2022-03-01 18:14:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:14:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:53,017 INFO L225 Difference]: With dead ends: 189 [2022-03-01 18:14:53,018 INFO L226 Difference]: Without dead ends: 189 [2022-03-01 18:14:53,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:14:53,019 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:53,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 143 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:14:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-01 18:14:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 73. [2022-03-01 18:14:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2022-03-01 18:14:53,025 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2022-03-01 18:14:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:53,026 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2022-03-01 18:14:53,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2022-03-01 18:14:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:53,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:53,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:53,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:53,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:53,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1390002466, now seen corresponding path program 5 times [2022-03-01 18:14:53,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:53,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839285934] [2022-03-01 18:14:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:53,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:53,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839285934] [2022-03-01 18:14:53,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839285934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:53,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208618260] [2022-03-01 18:14:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:14:53,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:53,316 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) [2022-03-01 18:14:53,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:14:53,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:14:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:53,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:53,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208618260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:53,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:53,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:14:53,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941176973] [2022-03-01 18:14:53,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:53,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:14:53,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:14:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:14:53,533 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:53,870 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2022-03-01 18:14:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:14:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:53,872 INFO L225 Difference]: With dead ends: 219 [2022-03-01 18:14:53,872 INFO L226 Difference]: Without dead ends: 205 [2022-03-01 18:14:53,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:14:53,873 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:53,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-01 18:14:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2022-03-01 18:14:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2022-03-01 18:14:53,878 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2022-03-01 18:14:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:53,878 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2022-03-01 18:14:53,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2022-03-01 18:14:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:53,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:53,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:53,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 18:14:54,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:54,085 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1979372002, now seen corresponding path program 6 times [2022-03-01 18:14:54,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:54,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033706410] [2022-03-01 18:14:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:54,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:54,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:54,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033706410] [2022-03-01 18:14:54,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033706410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:54,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997282050] [2022-03-01 18:14:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:54,155 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) [2022-03-01 18:14:54,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:14:54,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:14:54,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:54,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997282050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:54,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:54,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-01 18:14:54,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926221507] [2022-03-01 18:14:54,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:14:54,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:14:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:14:54,408 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:54,780 INFO L93 Difference]: Finished difference Result 245 states and 455 transitions. [2022-03-01 18:14:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:14:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:54,781 INFO L225 Difference]: With dead ends: 245 [2022-03-01 18:14:54,781 INFO L226 Difference]: Without dead ends: 245 [2022-03-01 18:14:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:14:54,782 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 213 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:54,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 102 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-01 18:14:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 118. [2022-03-01 18:14:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2022-03-01 18:14:54,787 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2022-03-01 18:14:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:54,787 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2022-03-01 18:14:54,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2022-03-01 18:14:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:54,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:54,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:54,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:55,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1647693214, now seen corresponding path program 7 times [2022-03-01 18:14:55,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:55,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010130500] [2022-03-01 18:14:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:55,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:55,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:55,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010130500] [2022-03-01 18:14:55,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010130500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:55,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062983234] [2022-03-01 18:14:55,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:14:55,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:55,052 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) [2022-03-01 18:14:55,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:14:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:55,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:55,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062983234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:55,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:55,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 18:14:55,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034986871] [2022-03-01 18:14:55,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:14:55,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:14:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:14:55,325 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:55,620 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2022-03-01 18:14:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:14:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:55,622 INFO L225 Difference]: With dead ends: 205 [2022-03-01 18:14:55,622 INFO L226 Difference]: Without dead ends: 203 [2022-03-01 18:14:55,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:14:55,623 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:55,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 54 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-01 18:14:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2022-03-01 18:14:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2022-03-01 18:14:55,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2022-03-01 18:14:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:55,628 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2022-03-01 18:14:55,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2022-03-01 18:14:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:55,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:55,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:55,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:55,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-01 18:14:55,848 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash -240395856, now seen corresponding path program 8 times [2022-03-01 18:14:55,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:55,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778635519] [2022-03-01 18:14:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:55,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:55,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778635519] [2022-03-01 18:14:55,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778635519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:55,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875656830] [2022-03-01 18:14:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:14:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:55,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:55,921 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) [2022-03-01 18:14:55,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:14:55,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:14:55,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:55,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:56,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:56,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875656830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:56,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:56,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-01 18:14:56,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206330994] [2022-03-01 18:14:56,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:14:56,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:14:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:14:56,169 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:56,648 INFO L93 Difference]: Finished difference Result 351 states and 688 transitions. [2022-03-01 18:14:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:14:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:56,650 INFO L225 Difference]: With dead ends: 351 [2022-03-01 18:14:56,650 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 18:14:56,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 18:14:56,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:56,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 131 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:14:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 18:14:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 165. [2022-03-01 18:14:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2022-03-01 18:14:56,659 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2022-03-01 18:14:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:56,659 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2022-03-01 18:14:56,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2022-03-01 18:14:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:56,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:56,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:56,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:56,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:14:56,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1351610928, now seen corresponding path program 9 times [2022-03-01 18:14:56,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:56,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343865651] [2022-03-01 18:14:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:56,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:56,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343865651] [2022-03-01 18:14:56,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343865651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:56,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488389759] [2022-03-01 18:14:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:14:56,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:56,938 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) [2022-03-01 18:14:56,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:14:56,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:14:56,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:56,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:56,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:57,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:57,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488389759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:57,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:57,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 18:14:57,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643847575] [2022-03-01 18:14:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:57,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:14:57,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:14:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:14:57,190 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:57,419 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2022-03-01 18:14:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:14:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:57,425 INFO L225 Difference]: With dead ends: 238 [2022-03-01 18:14:57,425 INFO L226 Difference]: Without dead ends: 235 [2022-03-01 18:14:57,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:14:57,426 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:57,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-01 18:14:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2022-03-01 18:14:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2022-03-01 18:14:57,432 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2022-03-01 18:14:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:57,432 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2022-03-01 18:14:57,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2022-03-01 18:14:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:57,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:57,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:57,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:57,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 18:14:57,647 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1992477080, now seen corresponding path program 10 times [2022-03-01 18:14:57,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:57,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224263258] [2022-03-01 18:14:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:14:57,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:57,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224263258] [2022-03-01 18:14:57,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224263258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:57,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782157711] [2022-03-01 18:14:57,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:14:57,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:57,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:57,696 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) [2022-03-01 18:14:57,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:14:57,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:14:57,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:57,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:57,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782157711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:57,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:57,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 18:14:57,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947036523] [2022-03-01 18:14:57,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:57,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:14:57,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:14:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:14:57,953 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:58,307 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2022-03-01 18:14:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:14:58,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:58,309 INFO L225 Difference]: With dead ends: 302 [2022-03-01 18:14:58,309 INFO L226 Difference]: Without dead ends: 300 [2022-03-01 18:14:58,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:14:58,312 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:58,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-01 18:14:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2022-03-01 18:14:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2022-03-01 18:14:58,326 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2022-03-01 18:14:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:58,327 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2022-03-01 18:14:58,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2022-03-01 18:14:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:14:58,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:58,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:58,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:58,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:14:58,528 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1796143950, now seen corresponding path program 11 times [2022-03-01 18:14:58,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:58,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94451850] [2022-03-01 18:14:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:58,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:58,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:58,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94451850] [2022-03-01 18:14:58,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94451850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:58,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082670347] [2022-03-01 18:14:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:14:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:58,584 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) [2022-03-01 18:14:58,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:14:58,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:14:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:14:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:58,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:58,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082670347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:58,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:58,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:14:58,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392879684] [2022-03-01 18:14:58,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:14:58,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:14:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:14:58,799 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:14:59,048 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2022-03-01 18:14:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:14:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:14:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:14:59,050 INFO L225 Difference]: With dead ends: 302 [2022-03-01 18:14:59,050 INFO L226 Difference]: Without dead ends: 296 [2022-03-01 18:14:59,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:14:59,051 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:14:59,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 53 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:14:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-01 18:14:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2022-03-01 18:14:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2022-03-01 18:14:59,057 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2022-03-01 18:14:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:14:59,058 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2022-03-01 18:14:59,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:14:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2022-03-01 18:14:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:14:59,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:14:59,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:14:59,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:14:59,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:14:59,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:14:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:14:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1370143840, now seen corresponding path program 12 times [2022-03-01 18:14:59,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:14:59,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474199994] [2022-03-01 18:14:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:14:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:14:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:14:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:59,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:14:59,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474199994] [2022-03-01 18:14:59,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474199994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:14:59,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107791275] [2022-03-01 18:14:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:14:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:14:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:14:59,392 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) [2022-03-01 18:14:59,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:14:59,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:14:59,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:14:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:14:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:14:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:59,670 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 18:14:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:59,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:14:59,810 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:14:59,810 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 20 treesize of output 45 [2022-03-01 18:14:59,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:14:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:14:59,876 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:14:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:14:59,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107791275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:14:59,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:14:59,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:14:59,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963726698] [2022-03-01 18:14:59,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:14:59,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:14:59,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:14:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:14:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:14:59,923 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:00,008 INFO L93 Difference]: Finished difference Result 270 states and 611 transitions. [2022-03-01 18:15:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:00,010 INFO L225 Difference]: With dead ends: 270 [2022-03-01 18:15:00,010 INFO L226 Difference]: Without dead ends: 254 [2022-03-01 18:15:00,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:00,011 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:00,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 121 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-01 18:15:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-01 18:15:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-03-01 18:15:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3363636363636364) internal successors, (514), 220 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 514 transitions. [2022-03-01 18:15:00,024 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 514 transitions. Word has length 22 [2022-03-01 18:15:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 514 transitions. [2022-03-01 18:15:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 514 transitions. [2022-03-01 18:15:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:00,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:00,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:00,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 18:15:00,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 18:15:00,239 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash -313455896, now seen corresponding path program 13 times [2022-03-01 18:15:00,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:00,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301136281] [2022-03-01 18:15:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:00,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:00,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301136281] [2022-03-01 18:15:00,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301136281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:00,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581931516] [2022-03-01 18:15:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:00,354 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) [2022-03-01 18:15:00,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:15:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:15:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:00,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:00,654 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 18:15:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:00,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:00,803 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:00,803 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 20 treesize of output 45 [2022-03-01 18:15:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:00,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:00,883 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:15:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:00,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581931516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:00,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:00,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:00,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444351629] [2022-03-01 18:15:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:00,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:15:00,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:00,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:15:00,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:00,925 INFO L87 Difference]: Start difference. First operand 221 states and 514 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:01,017 INFO L93 Difference]: Finished difference Result 263 states and 589 transitions. [2022-03-01 18:15:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:01,019 INFO L225 Difference]: With dead ends: 263 [2022-03-01 18:15:01,019 INFO L226 Difference]: Without dead ends: 253 [2022-03-01 18:15:01,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:01,020 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:01,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 103 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-01 18:15:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-01 18:15:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2022-03-01 18:15:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3554502369668247) internal successors, (497), 211 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 497 transitions. [2022-03-01 18:15:01,032 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 497 transitions. Word has length 22 [2022-03-01 18:15:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:01,032 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 497 transitions. [2022-03-01 18:15:01,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 497 transitions. [2022-03-01 18:15:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:01,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:01,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:01,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 18:15:01,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:01,249 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1887689564, now seen corresponding path program 14 times [2022-03-01 18:15:01,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:01,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406542274] [2022-03-01 18:15:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:01,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:01,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406542274] [2022-03-01 18:15:01,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406542274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:01,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926795250] [2022-03-01 18:15:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:01,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:01,370 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) [2022-03-01 18:15:01,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:15:01,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:15:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:01,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:01,901 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 27 [2022-03-01 18:15:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:01,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:02,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:02,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:02,386 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2022-03-01 18:15:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:02,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926795250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:02,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:02,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 18:15:02,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373654358] [2022-03-01 18:15:02,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:02,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:15:02,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:02,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:15:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:15:02,879 INFO L87 Difference]: Start difference. First operand 212 states and 497 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:03,602 INFO L93 Difference]: Finished difference Result 355 states and 801 transitions. [2022-03-01 18:15:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:03,605 INFO L225 Difference]: With dead ends: 355 [2022-03-01 18:15:03,605 INFO L226 Difference]: Without dead ends: 352 [2022-03-01 18:15:03,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:15:03,606 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:03,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 171 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 230 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-03-01 18:15:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-01 18:15:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2022-03-01 18:15:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.33920704845815) internal successors, (531), 227 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 531 transitions. [2022-03-01 18:15:03,613 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 531 transitions. Word has length 22 [2022-03-01 18:15:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:03,613 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 531 transitions. [2022-03-01 18:15:03,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 531 transitions. [2022-03-01 18:15:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:03,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:03,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:03,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:03,815 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 816408682, now seen corresponding path program 15 times [2022-03-01 18:15:03,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:03,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312431635] [2022-03-01 18:15:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:03,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:03,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312431635] [2022-03-01 18:15:03,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312431635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:03,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371900384] [2022-03-01 18:15:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:03,959 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) [2022-03-01 18:15:03,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:15:03,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:03,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 18:15:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:04,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:04,314 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 33 treesize of output 35 [2022-03-01 18:15:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:04,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:04,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:04,944 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 67 [2022-03-01 18:15:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:05,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371900384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:05,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:05,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 25 [2022-03-01 18:15:05,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384577148] [2022-03-01 18:15:05,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:05,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:05,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:05,710 INFO L87 Difference]: Start difference. First operand 228 states and 531 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:06,781 INFO L93 Difference]: Finished difference Result 431 states and 961 transitions. [2022-03-01 18:15:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:15:06,781 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:06,783 INFO L225 Difference]: With dead ends: 431 [2022-03-01 18:15:06,783 INFO L226 Difference]: Without dead ends: 413 [2022-03-01 18:15:06,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:15:06,784 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:06,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 162 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 329 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2022-03-01 18:15:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-01 18:15:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 259. [2022-03-01 18:15:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.317829457364341) internal successors, (598), 258 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 598 transitions. [2022-03-01 18:15:06,793 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 598 transitions. Word has length 22 [2022-03-01 18:15:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:06,793 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 598 transitions. [2022-03-01 18:15:06,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 598 transitions. [2022-03-01 18:15:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:06,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:06,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:06,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-01 18:15:07,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:07,008 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1928000206, now seen corresponding path program 16 times [2022-03-01 18:15:07,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:07,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708353728] [2022-03-01 18:15:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:07,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708353728] [2022-03-01 18:15:07,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708353728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:07,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202492569] [2022-03-01 18:15:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:07,108 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) [2022-03-01 18:15:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:15:07,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:15:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:07,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:07,348 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 18:15:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:07,491 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:07,491 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 20 treesize of output 45 [2022-03-01 18:15:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:07,544 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:15:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:07,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202492569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:07,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:07,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 18:15:07,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356897156] [2022-03-01 18:15:07,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:07,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:07,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:07,612 INFO L87 Difference]: Start difference. First operand 259 states and 598 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:07,743 INFO L93 Difference]: Finished difference Result 334 states and 733 transitions. [2022-03-01 18:15:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:15:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:07,745 INFO L225 Difference]: With dead ends: 334 [2022-03-01 18:15:07,745 INFO L226 Difference]: Without dead ends: 311 [2022-03-01 18:15:07,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:07,746 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:07,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 109 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-01 18:15:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-01 18:15:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 268. [2022-03-01 18:15:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3183520599250937) internal successors, (619), 267 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 619 transitions. [2022-03-01 18:15:07,753 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 619 transitions. Word has length 22 [2022-03-01 18:15:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:07,753 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 619 transitions. [2022-03-01 18:15:07,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:07,753 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 619 transitions. [2022-03-01 18:15:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:07,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:07,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:07,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:07,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:07,971 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash -871312262, now seen corresponding path program 17 times [2022-03-01 18:15:07,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:07,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089689794] [2022-03-01 18:15:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:07,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:08,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:08,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089689794] [2022-03-01 18:15:08,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089689794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:08,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852894129] [2022-03-01 18:15:08,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:08,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:08,083 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) [2022-03-01 18:15:08,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:15:08,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:15:08,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:08,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:15:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:08,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:08,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:08,353 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 18:15:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:08,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:08,493 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:08,493 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 20 treesize of output 45 [2022-03-01 18:15:08,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:08,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:08,541 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:15:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:08,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852894129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:08,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:08,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 18:15:08,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13372463] [2022-03-01 18:15:08,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:08,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:15:08,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:15:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:08,588 INFO L87 Difference]: Start difference. First operand 268 states and 619 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:08,709 INFO L93 Difference]: Finished difference Result 329 states and 720 transitions. [2022-03-01 18:15:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:15:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:08,710 INFO L225 Difference]: With dead ends: 329 [2022-03-01 18:15:08,710 INFO L226 Difference]: Without dead ends: 326 [2022-03-01 18:15:08,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:15:08,711 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:08,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 119 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 210 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-01 18:15:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-01 18:15:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 264. [2022-03-01 18:15:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.32319391634981) internal successors, (611), 263 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 611 transitions. [2022-03-01 18:15:08,718 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 611 transitions. Word has length 22 [2022-03-01 18:15:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:08,718 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 611 transitions. [2022-03-01 18:15:08,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 611 transitions. [2022-03-01 18:15:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:15:08,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:08,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:08,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:08,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:08,931 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash 962650606, now seen corresponding path program 18 times [2022-03-01 18:15:08,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:08,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908780093] [2022-03-01 18:15:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:08,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:09,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908780093] [2022-03-01 18:15:09,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908780093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:09,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633590946] [2022-03-01 18:15:09,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:09,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:09,050 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) [2022-03-01 18:15:09,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:15:09,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:15:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:15:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:09,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:09,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:09,271 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 18:15:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:09,394 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:15:09,394 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 20 treesize of output 45 [2022-03-01 18:15:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:09,456 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:15:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633590946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:09,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:09,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:15:09,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104904588] [2022-03-01 18:15:09,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:09,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:15:09,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:15:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:09,505 INFO L87 Difference]: Start difference. First operand 264 states and 611 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:09,649 INFO L93 Difference]: Finished difference Result 357 states and 781 transitions. [2022-03-01 18:15:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:15:09,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:15:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:09,651 INFO L225 Difference]: With dead ends: 357 [2022-03-01 18:15:09,651 INFO L226 Difference]: Without dead ends: 350 [2022-03-01 18:15:09,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:15:09,652 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:09,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 150 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-01 18:15:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 283. [2022-03-01 18:15:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.3297872340425534) internal successors, (657), 282 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:09,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 657 transitions. [2022-03-01 18:15:09,659 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 657 transitions. Word has length 22 [2022-03-01 18:15:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:09,659 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 657 transitions. [2022-03-01 18:15:09,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:09,659 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 657 transitions. [2022-03-01 18:15:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:09,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:09,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:09,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:09,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:09,883 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash 419045022, now seen corresponding path program 19 times [2022-03-01 18:15:09,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:09,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66523620] [2022-03-01 18:15:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:09,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:09,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66523620] [2022-03-01 18:15:09,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66523620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:09,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41505040] [2022-03-01 18:15:09,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:09,966 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) [2022-03-01 18:15:09,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:15:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:10,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:10,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41505040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:10,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:10,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-01 18:15:10,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489553127] [2022-03-01 18:15:10,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:10,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:10,230 INFO L87 Difference]: Start difference. First operand 283 states and 657 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:10,835 INFO L93 Difference]: Finished difference Result 565 states and 1194 transitions. [2022-03-01 18:15:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:15:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:10,838 INFO L225 Difference]: With dead ends: 565 [2022-03-01 18:15:10,838 INFO L226 Difference]: Without dead ends: 565 [2022-03-01 18:15:10,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:15:10,840 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 186 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:10,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 135 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-01 18:15:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 261. [2022-03-01 18:15:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.330769230769231) internal successors, (606), 260 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 606 transitions. [2022-03-01 18:15:10,848 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 606 transitions. Word has length 24 [2022-03-01 18:15:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:10,848 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 606 transitions. [2022-03-01 18:15:10,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 606 transitions. [2022-03-01 18:15:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:10,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:10,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:10,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:11,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 18:15:11,067 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -989086942, now seen corresponding path program 20 times [2022-03-01 18:15:11,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:11,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547302436] [2022-03-01 18:15:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:11,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547302436] [2022-03-01 18:15:11,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547302436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:11,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021119575] [2022-03-01 18:15:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:11,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:11,141 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) [2022-03-01 18:15:11,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:15:11,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:11,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:11,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021119575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:11,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:11,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 18:15:11,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755018692] [2022-03-01 18:15:11,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:11,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:11,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:11,410 INFO L87 Difference]: Start difference. First operand 261 states and 606 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:11,942 INFO L93 Difference]: Finished difference Result 727 states and 1493 transitions. [2022-03-01 18:15:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:15:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:11,944 INFO L225 Difference]: With dead ends: 727 [2022-03-01 18:15:11,944 INFO L226 Difference]: Without dead ends: 683 [2022-03-01 18:15:11,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:15:11,945 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:11,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 134 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-01 18:15:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 317. [2022-03-01 18:15:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3512658227848102) internal successors, (743), 316 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 743 transitions. [2022-03-01 18:15:11,955 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 743 transitions. Word has length 24 [2022-03-01 18:15:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:11,955 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 743 transitions. [2022-03-01 18:15:11,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 743 transitions. [2022-03-01 18:15:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:11,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:11,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:11,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-01 18:15:12,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-01 18:15:12,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 867513058, now seen corresponding path program 21 times [2022-03-01 18:15:12,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:12,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628430497] [2022-03-01 18:15:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:12,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:12,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628430497] [2022-03-01 18:15:12,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628430497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:12,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84157346] [2022-03-01 18:15:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:12,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:12,230 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) [2022-03-01 18:15:12,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:15:12,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:12,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:12,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:12,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:12,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84157346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:12,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:12,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-01 18:15:12,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460528654] [2022-03-01 18:15:12,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:12,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:12,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:12,522 INFO L87 Difference]: Start difference. First operand 317 states and 743 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:13,204 INFO L93 Difference]: Finished difference Result 759 states and 1599 transitions. [2022-03-01 18:15:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:15:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:13,207 INFO L225 Difference]: With dead ends: 759 [2022-03-01 18:15:13,207 INFO L226 Difference]: Without dead ends: 757 [2022-03-01 18:15:13,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:15:13,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:13,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 159 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-01 18:15:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2022-03-01 18:15:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3984375) internal successors, (921), 384 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 921 transitions. [2022-03-01 18:15:13,228 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 921 transitions. Word has length 24 [2022-03-01 18:15:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:13,228 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 921 transitions. [2022-03-01 18:15:13,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 921 transitions. [2022-03-01 18:15:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:13,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:13,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:13,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:13,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 18:15:13,451 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash 535834270, now seen corresponding path program 22 times [2022-03-01 18:15:13,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:13,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400325638] [2022-03-01 18:15:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:13,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:13,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400325638] [2022-03-01 18:15:13,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400325638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:13,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394176943] [2022-03-01 18:15:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:13,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:13,517 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) [2022-03-01 18:15:13,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:15:13,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:13,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:13,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394176943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:13,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:13,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 18:15:13,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729938085] [2022-03-01 18:15:13,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:13,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:13,822 INFO L87 Difference]: Start difference. First operand 385 states and 921 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:14,244 INFO L93 Difference]: Finished difference Result 562 states and 1252 transitions. [2022-03-01 18:15:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:15:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:14,246 INFO L225 Difference]: With dead ends: 562 [2022-03-01 18:15:14,246 INFO L226 Difference]: Without dead ends: 558 [2022-03-01 18:15:14,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:15:14,247 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:14,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 77 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-01 18:15:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 385. [2022-03-01 18:15:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3958333333333335) internal successors, (920), 384 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 920 transitions. [2022-03-01 18:15:14,259 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 920 transitions. Word has length 24 [2022-03-01 18:15:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:14,259 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 920 transitions. [2022-03-01 18:15:14,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 920 transitions. [2022-03-01 18:15:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:14,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:14,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:14,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:14,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:14,483 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 48878956, now seen corresponding path program 23 times [2022-03-01 18:15:14,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:14,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778801774] [2022-03-01 18:15:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:14,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:14,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778801774] [2022-03-01 18:15:14,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778801774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:14,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427659333] [2022-03-01 18:15:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:14,542 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) [2022-03-01 18:15:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:15:14,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:15:14,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:14,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427659333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:14,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:14,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 18:15:14,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177582494] [2022-03-01 18:15:14,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:14,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:14,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:14,825 INFO L87 Difference]: Start difference. First operand 385 states and 920 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:15,237 INFO L93 Difference]: Finished difference Result 616 states and 1364 transitions. [2022-03-01 18:15:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:15:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:15,239 INFO L225 Difference]: With dead ends: 616 [2022-03-01 18:15:15,239 INFO L226 Difference]: Without dead ends: 607 [2022-03-01 18:15:15,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:15:15,240 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:15,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 102 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-01 18:15:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 406. [2022-03-01 18:15:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.417283950617284) internal successors, (979), 405 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 979 transitions. [2022-03-01 18:15:15,252 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 979 transitions. Word has length 24 [2022-03-01 18:15:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:15,252 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 979 transitions. [2022-03-01 18:15:15,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 979 transitions. [2022-03-01 18:15:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:15,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:15,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:15,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 18:15:15,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:15:15,476 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash 493411978, now seen corresponding path program 24 times [2022-03-01 18:15:15,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:15,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512512239] [2022-03-01 18:15:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:15,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:15,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:15,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512512239] [2022-03-01 18:15:15,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512512239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:15,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89362314] [2022-03-01 18:15:15,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:15,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:15,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:15,558 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) [2022-03-01 18:15:15,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:15:15,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:15:15,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:15,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:15,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89362314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:15,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:15,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 18:15:15,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581782374] [2022-03-01 18:15:15,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:15,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:15,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:15,845 INFO L87 Difference]: Start difference. First operand 406 states and 979 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:16,367 INFO L93 Difference]: Finished difference Result 736 states and 1626 transitions. [2022-03-01 18:15:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:15:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:16,370 INFO L225 Difference]: With dead ends: 736 [2022-03-01 18:15:16,370 INFO L226 Difference]: Without dead ends: 722 [2022-03-01 18:15:16,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:15:16,371 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 97 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-01 18:15:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 409. [2022-03-01 18:15:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.411764705882353) internal successors, (984), 408 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 984 transitions. [2022-03-01 18:15:16,382 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 984 transitions. Word has length 24 [2022-03-01 18:15:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:16,382 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 984 transitions. [2022-03-01 18:15:16,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 984 transitions. [2022-03-01 18:15:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:16,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:16,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:16,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:16,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:15:16,611 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1128304716, now seen corresponding path program 25 times [2022-03-01 18:15:16,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:16,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902592871] [2022-03-01 18:15:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:16,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:16,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902592871] [2022-03-01 18:15:16,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902592871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:16,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286549298] [2022-03-01 18:15:16,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:16,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:16,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:16,675 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) [2022-03-01 18:15:16,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:15:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:16,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:16,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286549298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:16,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:16,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 18:15:16,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074884762] [2022-03-01 18:15:16,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:16,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:16,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:16,957 INFO L87 Difference]: Start difference. First operand 409 states and 984 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:17,596 INFO L93 Difference]: Finished difference Result 923 states and 1981 transitions. [2022-03-01 18:15:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:15:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:17,599 INFO L225 Difference]: With dead ends: 923 [2022-03-01 18:15:17,599 INFO L226 Difference]: Without dead ends: 923 [2022-03-01 18:15:17,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:15:17,600 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:17,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 192 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-01 18:15:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 431. [2022-03-01 18:15:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.386046511627907) internal successors, (1026), 430 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1026 transitions. [2022-03-01 18:15:17,612 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1026 transitions. Word has length 24 [2022-03-01 18:15:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:17,612 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1026 transitions. [2022-03-01 18:15:17,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1026 transitions. [2022-03-01 18:15:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:17,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:17,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:17,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:17,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:17,827 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -218142668, now seen corresponding path program 26 times [2022-03-01 18:15:17,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:17,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232642283] [2022-03-01 18:15:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:17,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:17,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232642283] [2022-03-01 18:15:17,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232642283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:17,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195008190] [2022-03-01 18:15:17,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:17,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:17,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:17,883 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) [2022-03-01 18:15:17,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:15:17,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:18,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:18,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195008190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:18,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:18,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 18:15:18,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793944473] [2022-03-01 18:15:18,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:18,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:18,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:18,134 INFO L87 Difference]: Start difference. First operand 431 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:18,512 INFO L93 Difference]: Finished difference Result 601 states and 1312 transitions. [2022-03-01 18:15:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:15:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:18,514 INFO L225 Difference]: With dead ends: 601 [2022-03-01 18:15:18,514 INFO L226 Difference]: Without dead ends: 583 [2022-03-01 18:15:18,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:15:18,515 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:18,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 109 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-01 18:15:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 431. [2022-03-01 18:15:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3767441860465115) internal successors, (1022), 430 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1022 transitions. [2022-03-01 18:15:18,524 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1022 transitions. Word has length 24 [2022-03-01 18:15:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:18,524 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1022 transitions. [2022-03-01 18:15:18,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1022 transitions. [2022-03-01 18:15:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:18,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:18,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:18,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:18,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:18,747 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1556407664, now seen corresponding path program 27 times [2022-03-01 18:15:18,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:18,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630746926] [2022-03-01 18:15:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:18,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:18,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630746926] [2022-03-01 18:15:18,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630746926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:18,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640056772] [2022-03-01 18:15:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:18,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:18,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:18,812 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) [2022-03-01 18:15:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:15:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:19,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640056772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:19,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:19,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 18:15:19,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582350921] [2022-03-01 18:15:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:19,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 18:15:19,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 18:15:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:15:19,153 INFO L87 Difference]: Start difference. First operand 431 states and 1022 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:19,897 INFO L93 Difference]: Finished difference Result 1092 states and 2410 transitions. [2022-03-01 18:15:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:15:19,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:19,900 INFO L225 Difference]: With dead ends: 1092 [2022-03-01 18:15:19,900 INFO L226 Difference]: Without dead ends: 1092 [2022-03-01 18:15:19,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:15:19,902 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 293 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 143 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-03-01 18:15:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 664. [2022-03-01 18:15:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4630467571644044) internal successors, (1633), 663 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1633 transitions. [2022-03-01 18:15:19,918 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1633 transitions. Word has length 24 [2022-03-01 18:15:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:19,919 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1633 transitions. [2022-03-01 18:15:19,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1633 transitions. [2022-03-01 18:15:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:19,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:19,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:19,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:20,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:20,143 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash -195673560, now seen corresponding path program 28 times [2022-03-01 18:15:20,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:20,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439598341] [2022-03-01 18:15:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:20,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:20,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439598341] [2022-03-01 18:15:20,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439598341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:20,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280160504] [2022-03-01 18:15:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:20,196 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) [2022-03-01 18:15:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:15:20,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:20,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:20,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:20,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280160504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:20,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:20,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 18:15:20,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2772806] [2022-03-01 18:15:20,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:20,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:20,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:20,464 INFO L87 Difference]: Start difference. First operand 664 states and 1633 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:21,036 INFO L93 Difference]: Finished difference Result 945 states and 2149 transitions. [2022-03-01 18:15:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:21,040 INFO L225 Difference]: With dead ends: 945 [2022-03-01 18:15:21,040 INFO L226 Difference]: Without dead ends: 941 [2022-03-01 18:15:21,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:15:21,041 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:21,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 76 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:15:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-01 18:15:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 664. [2022-03-01 18:15:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4585218702865763) internal successors, (1630), 663 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1630 transitions. [2022-03-01 18:15:21,054 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1630 transitions. Word has length 24 [2022-03-01 18:15:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:21,055 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1630 transitions. [2022-03-01 18:15:21,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1630 transitions. [2022-03-01 18:15:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:21,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:21,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:21,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:21,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:21,271 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash -702019826, now seen corresponding path program 29 times [2022-03-01 18:15:21,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:21,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046139829] [2022-03-01 18:15:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:15:21,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:21,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046139829] [2022-03-01 18:15:21,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046139829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:21,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448110956] [2022-03-01 18:15:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:21,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:21,329 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) [2022-03-01 18:15:21,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:15:21,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:15:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:21,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:21,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448110956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:21,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:21,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 18:15:21,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912296192] [2022-03-01 18:15:21,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:21,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:21,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:21,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:21,579 INFO L87 Difference]: Start difference. First operand 664 states and 1630 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:22,070 INFO L93 Difference]: Finished difference Result 1032 states and 2346 transitions. [2022-03-01 18:15:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:15:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:22,073 INFO L225 Difference]: With dead ends: 1032 [2022-03-01 18:15:22,073 INFO L226 Difference]: Without dead ends: 1020 [2022-03-01 18:15:22,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:15:22,074 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:22,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 75 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-03-01 18:15:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 715. [2022-03-01 18:15:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.4747899159663866) internal successors, (1767), 714 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1767 transitions. [2022-03-01 18:15:22,091 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1767 transitions. Word has length 24 [2022-03-01 18:15:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:22,091 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1767 transitions. [2022-03-01 18:15:22,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1767 transitions. [2022-03-01 18:15:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:15:22,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:22,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:22,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 18:15:22,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-01 18:15:22,315 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -929241206, now seen corresponding path program 30 times [2022-03-01 18:15:22,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:22,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785718768] [2022-03-01 18:15:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:22,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:22,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785718768] [2022-03-01 18:15:22,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785718768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:22,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586902289] [2022-03-01 18:15:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:22,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:22,381 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) [2022-03-01 18:15:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:15:22,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 18:15:22,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:22,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:22,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586902289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:22,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:22,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 18:15:22,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018960700] [2022-03-01 18:15:22,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:15:22,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:15:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:15:22,614 INFO L87 Difference]: Start difference. First operand 715 states and 1767 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:23,052 INFO L93 Difference]: Finished difference Result 1063 states and 2453 transitions. [2022-03-01 18:15:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:15:23,052 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:15:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:23,056 INFO L225 Difference]: With dead ends: 1063 [2022-03-01 18:15:23,056 INFO L226 Difference]: Without dead ends: 1043 [2022-03-01 18:15:23,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:15:23,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:23,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 73 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:15:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-01 18:15:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 771. [2022-03-01 18:15:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.4883116883116885) internal successors, (1916), 770 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1916 transitions. [2022-03-01 18:15:23,074 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1916 transitions. Word has length 24 [2022-03-01 18:15:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:23,074 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1916 transitions. [2022-03-01 18:15:23,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1916 transitions. [2022-03-01 18:15:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:23,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:23,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:23,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:23,299 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash 434491040, now seen corresponding path program 31 times [2022-03-01 18:15:23,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:23,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791434370] [2022-03-01 18:15:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:23,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:23,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:23,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791434370] [2022-03-01 18:15:23,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791434370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:23,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463672369] [2022-03-01 18:15:23,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:23,559 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) [2022-03-01 18:15:23,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:15:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:23,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:23,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:24,165 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:24,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:24,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:24,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463672369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:24,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:24,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:24,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496775480] [2022-03-01 18:15:24,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:24,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:24,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:24,438 INFO L87 Difference]: Start difference. First operand 771 states and 1916 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:25,284 INFO L93 Difference]: Finished difference Result 1161 states and 2807 transitions. [2022-03-01 18:15:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:15:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-01 18:15:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:25,289 INFO L225 Difference]: With dead ends: 1161 [2022-03-01 18:15:25,289 INFO L226 Difference]: Without dead ends: 1154 [2022-03-01 18:15:25,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:15:25,290 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:25,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 138 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 330 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-01 18:15:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-01 18:15:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 819. [2022-03-01 18:15:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.4731051344743276) internal successors, (2023), 818 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2023 transitions. [2022-03-01 18:15:25,303 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2023 transitions. Word has length 26 [2022-03-01 18:15:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:25,303 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2023 transitions. [2022-03-01 18:15:25,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2023 transitions. [2022-03-01 18:15:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:25,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:25,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:25,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:25,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:25,527 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1491178984, now seen corresponding path program 32 times [2022-03-01 18:15:25,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:25,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334221713] [2022-03-01 18:15:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:25,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:25,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334221713] [2022-03-01 18:15:25,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334221713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:25,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607633282] [2022-03-01 18:15:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:25,771 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) [2022-03-01 18:15:25,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:15:25,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:25,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:26,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:26,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:26,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:26,404 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:26,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:26,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:26,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607633282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:26,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:26,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:26,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097026305] [2022-03-01 18:15:26,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:26,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:26,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:26,569 INFO L87 Difference]: Start difference. First operand 819 states and 2023 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:27,464 INFO L93 Difference]: Finished difference Result 1175 states and 2816 transitions. [2022-03-01 18:15:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:15:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-01 18:15:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:27,468 INFO L225 Difference]: With dead ends: 1175 [2022-03-01 18:15:27,468 INFO L226 Difference]: Without dead ends: 1172 [2022-03-01 18:15:27,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:15:27,469 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:27,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 140 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 380 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-01 18:15:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-01 18:15:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 815. [2022-03-01 18:15:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.4754299754299756) internal successors, (2015), 814 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2015 transitions. [2022-03-01 18:15:27,494 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2015 transitions. Word has length 26 [2022-03-01 18:15:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:27,495 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2015 transitions. [2022-03-01 18:15:27,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2015 transitions. [2022-03-01 18:15:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:27,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:27,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:27,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:27,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:15:27,711 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -83054684, now seen corresponding path program 33 times [2022-03-01 18:15:27,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:27,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888950998] [2022-03-01 18:15:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:27,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:27,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888950998] [2022-03-01 18:15:27,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888950998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:27,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709438388] [2022-03-01 18:15:27,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:27,982 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) [2022-03-01 18:15:27,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:15:28,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:28,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:15:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:28,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:28,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:28,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:28,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-01 18:15:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:28,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:29,756 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-01 18:15:29,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-01 18:15:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:33,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709438388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:33,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:33,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-01 18:15:33,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382206918] [2022-03-01 18:15:33,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:15:33,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:15:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:15:33,301 INFO L87 Difference]: Start difference. First operand 815 states and 2015 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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) [2022-03-01 18:15:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:34,429 INFO L93 Difference]: Finished difference Result 1194 states and 2858 transitions. [2022-03-01 18:15:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:15:34,429 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 26 [2022-03-01 18:15:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:34,433 INFO L225 Difference]: With dead ends: 1194 [2022-03-01 18:15:34,433 INFO L226 Difference]: Without dead ends: 1188 [2022-03-01 18:15:34,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:15:34,435 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:34,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 396 Invalid, 0 Unknown, 469 Unchecked, 0.2s Time] [2022-03-01 18:15:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-03-01 18:15:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 857. [2022-03-01 18:15:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.4661214953271027) internal successors, (2111), 856 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2111 transitions. [2022-03-01 18:15:34,450 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2111 transitions. Word has length 26 [2022-03-01 18:15:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2111 transitions. [2022-03-01 18:15:34,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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) [2022-03-01 18:15:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2111 transitions. [2022-03-01 18:15:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:34,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:34,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:34,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:34,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:15:34,675 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1093121440, now seen corresponding path program 34 times [2022-03-01 18:15:34,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:34,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684035054] [2022-03-01 18:15:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:34,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:34,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684035054] [2022-03-01 18:15:34,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684035054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:34,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735180529] [2022-03-01 18:15:34,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:34,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:34,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:34,928 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) [2022-03-01 18:15:34,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:15:34,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:35,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:35,579 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:35,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:35,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:35,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735180529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:35,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:35,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:35,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391721293] [2022-03-01 18:15:35,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:35,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:35,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:35,823 INFO L87 Difference]: Start difference. First operand 857 states and 2111 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:36,827 INFO L93 Difference]: Finished difference Result 1262 states and 3022 transitions. [2022-03-01 18:15:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:15:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-01 18:15:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:36,832 INFO L225 Difference]: With dead ends: 1262 [2022-03-01 18:15:36,832 INFO L226 Difference]: Without dead ends: 1259 [2022-03-01 18:15:36,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:15:36,833 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:36,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 172 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 607 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-03-01 18:15:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-01 18:15:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 863. [2022-03-01 18:15:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.4628770301624128) internal successors, (2123), 862 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2123 transitions. [2022-03-01 18:15:36,847 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2123 transitions. Word has length 26 [2022-03-01 18:15:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:36,847 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2123 transitions. [2022-03-01 18:15:36,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2123 transitions. [2022-03-01 18:15:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:36,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:36,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:36,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:37,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:15:37,062 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1170935528, now seen corresponding path program 35 times [2022-03-01 18:15:37,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:37,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187729032] [2022-03-01 18:15:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:37,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:37,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:37,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187729032] [2022-03-01 18:15:37,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187729032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:37,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157862407] [2022-03-01 18:15:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:15:37,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:37,372 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) [2022-03-01 18:15:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:15:37,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:15:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:37,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:38,009 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:38,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:38,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:38,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:38,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157862407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:38,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:38,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:38,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408079642] [2022-03-01 18:15:38,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:38,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:38,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:38,236 INFO L87 Difference]: Start difference. First operand 863 states and 2123 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:39,261 INFO L93 Difference]: Finished difference Result 1252 states and 2968 transitions. [2022-03-01 18:15:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:15:39,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-01 18:15:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:39,265 INFO L225 Difference]: With dead ends: 1252 [2022-03-01 18:15:39,265 INFO L226 Difference]: Without dead ends: 1249 [2022-03-01 18:15:39,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:15:39,266 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:39,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 146 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-03-01 18:15:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-03-01 18:15:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 861. [2022-03-01 18:15:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.4651162790697674) internal successors, (2120), 860 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2120 transitions. [2022-03-01 18:15:39,281 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2120 transitions. Word has length 26 [2022-03-01 18:15:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:39,282 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2120 transitions. [2022-03-01 18:15:39,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:15:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2120 transitions. [2022-03-01 18:15:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:39,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:39,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:39,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 18:15:39,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:15:39,491 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 234980, now seen corresponding path program 36 times [2022-03-01 18:15:39,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:39,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424054326] [2022-03-01 18:15:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:39,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:39,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:39,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424054326] [2022-03-01 18:15:39,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424054326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:39,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421586242] [2022-03-01 18:15:39,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:15:39,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:39,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:39,753 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) [2022-03-01 18:15:39,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:15:39,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:15:39,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:40,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:40,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:40,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:40,359 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:40,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:40,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:40,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421586242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:40,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:40,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:40,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032551807] [2022-03-01 18:15:40,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:40,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:40,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:40,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:40,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:40,553 INFO L87 Difference]: Start difference. First operand 861 states and 2120 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:41,435 INFO L93 Difference]: Finished difference Result 1190 states and 2852 transitions. [2022-03-01 18:15:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:15:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-01 18:15:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:41,438 INFO L225 Difference]: With dead ends: 1190 [2022-03-01 18:15:41,438 INFO L226 Difference]: Without dead ends: 1183 [2022-03-01 18:15:41,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:15:41,439 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:41,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 127 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 409 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-03-01 18:15:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-03-01 18:15:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 868. [2022-03-01 18:15:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.4694348327566322) internal successors, (2141), 867 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2141 transitions. [2022-03-01 18:15:41,453 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2141 transitions. Word has length 26 [2022-03-01 18:15:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:41,453 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2141 transitions. [2022-03-01 18:15:41,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2141 transitions. [2022-03-01 18:15:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:41,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:41,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:41,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:15:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:41,677 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1008532964, now seen corresponding path program 37 times [2022-03-01 18:15:41,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:41,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909967766] [2022-03-01 18:15:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:41,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:41,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:41,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909967766] [2022-03-01 18:15:41,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909967766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:41,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525332241] [2022-03-01 18:15:41,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:15:41,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:41,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:41,924 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) [2022-03-01 18:15:41,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:15:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:42,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:42,511 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:42,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:42,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:42,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525332241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:42,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:42,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:42,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238999058] [2022-03-01 18:15:42,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:42,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:42,692 INFO L87 Difference]: Start difference. First operand 868 states and 2141 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:43,654 INFO L93 Difference]: Finished difference Result 1265 states and 3033 transitions. [2022-03-01 18:15:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:15:43,655 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-01 18:15:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:43,657 INFO L225 Difference]: With dead ends: 1265 [2022-03-01 18:15:43,657 INFO L226 Difference]: Without dead ends: 1258 [2022-03-01 18:15:43,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:15:43,658 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:43,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 140 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 462 Invalid, 0 Unknown, 257 Unchecked, 0.3s Time] [2022-03-01 18:15:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-03-01 18:15:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 900. [2022-03-01 18:15:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.474972191323693) internal successors, (2225), 899 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2225 transitions. [2022-03-01 18:15:43,671 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2225 transitions. Word has length 26 [2022-03-01 18:15:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:43,671 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2225 transitions. [2022-03-01 18:15:43,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:15:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2225 transitions. [2022-03-01 18:15:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:43,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:43,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:43,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 18:15:43,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 18:15:43,876 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash -9411100, now seen corresponding path program 38 times [2022-03-01 18:15:43,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:43,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635753326] [2022-03-01 18:15:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:44,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:44,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635753326] [2022-03-01 18:15:44,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635753326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:44,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688064607] [2022-03-01 18:15:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:15:44,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:44,170 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) [2022-03-01 18:15:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:15:44,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:15:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:44,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:44,758 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:44,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:44,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:44,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:44,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688064607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:44,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:44,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:44,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265488216] [2022-03-01 18:15:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:44,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:44,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:44,948 INFO L87 Difference]: Start difference. First operand 900 states and 2225 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:45,862 INFO L93 Difference]: Finished difference Result 1181 states and 2881 transitions. [2022-03-01 18:15:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:15:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:15:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:45,865 INFO L225 Difference]: With dead ends: 1181 [2022-03-01 18:15:45,865 INFO L226 Difference]: Without dead ends: 1174 [2022-03-01 18:15:45,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:15:45,866 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:45,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 118 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 449 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-03-01 18:15:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-01 18:15:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 911. [2022-03-01 18:15:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.4835164835164836) internal successors, (2260), 910 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2260 transitions. [2022-03-01 18:15:45,880 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2260 transitions. Word has length 26 [2022-03-01 18:15:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:45,881 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2260 transitions. [2022-03-01 18:15:45,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2260 transitions. [2022-03-01 18:15:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:45,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:45,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:45,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-01 18:15:46,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 18:15:46,084 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2100038610, now seen corresponding path program 39 times [2022-03-01 18:15:46,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:46,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616807596] [2022-03-01 18:15:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:46,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:46,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616807596] [2022-03-01 18:15:46,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616807596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:46,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669183471] [2022-03-01 18:15:46,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:15:46,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:46,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:46,339 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) [2022-03-01 18:15:46,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:15:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:15:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:46,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:15:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:46,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:46,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:46,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:15:46,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-01 18:15:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:47,964 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-01 18:15:47,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-01 18:15:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:55,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669183471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:55,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:55,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-01 18:15:55,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066819802] [2022-03-01 18:15:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:55,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:15:55,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:15:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:15:55,960 INFO L87 Difference]: Start difference. First operand 911 states and 2260 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2022-03-01 18:15:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:15:57,440 INFO L93 Difference]: Finished difference Result 1339 states and 3202 transitions. [2022-03-01 18:15:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:15:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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 26 [2022-03-01 18:15:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:15:57,443 INFO L225 Difference]: With dead ends: 1339 [2022-03-01 18:15:57,443 INFO L226 Difference]: Without dead ends: 1284 [2022-03-01 18:15:57,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:15:57,444 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 121 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 927 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:15:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 212 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 927 Unchecked, 0.2s Time] [2022-03-01 18:15:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-01 18:15:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 923. [2022-03-01 18:15:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.477223427331887) internal successors, (2284), 922 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:15:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2284 transitions. [2022-03-01 18:15:57,461 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2284 transitions. Word has length 26 [2022-03-01 18:15:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:15:57,461 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 2284 transitions. [2022-03-01 18:15:57,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 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) [2022-03-01 18:15:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2284 transitions. [2022-03-01 18:15:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:15:57,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:15:57,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:15:57,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 18:15:57,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-01 18:15:57,664 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:15:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:15:57,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1232654318, now seen corresponding path program 40 times [2022-03-01 18:15:57,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:15:57,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883657299] [2022-03-01 18:15:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:15:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:15:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:15:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:57,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:15:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883657299] [2022-03-01 18:15:57,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883657299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:15:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344226446] [2022-03-01 18:15:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:15:57,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:15:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:15:57,957 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) [2022-03-01 18:15:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:15:57,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:15:57,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:15:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:15:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:15:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:15:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:58,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:15:58,551 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:15:58,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:15:58,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:15:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:15:58,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:15:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:15:58,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344226446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:15:58,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:15:58,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:15:58,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295466585] [2022-03-01 18:15:58,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:15:58,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:15:58,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:15:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:15:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:15:58,729 INFO L87 Difference]: Start difference. First operand 923 states and 2284 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:16:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:00,346 INFO L93 Difference]: Finished difference Result 1394 states and 3319 transitions. [2022-03-01 18:16:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 18:16:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-01 18:16:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:00,349 INFO L225 Difference]: With dead ends: 1394 [2022-03-01 18:16:00,349 INFO L226 Difference]: Without dead ends: 1309 [2022-03-01 18:16:00,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:16:00,350 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:00,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 228 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 717 Invalid, 0 Unknown, 247 Unchecked, 0.4s Time] [2022-03-01 18:16:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-03-01 18:16:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 975. [2022-03-01 18:16:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.452772073921971) internal successors, (2389), 974 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2389 transitions. [2022-03-01 18:16:00,365 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2389 transitions. Word has length 26 [2022-03-01 18:16:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:00,365 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2389 transitions. [2022-03-01 18:16:00,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:16:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2389 transitions. [2022-03-01 18:16:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:00,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:00,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:00,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:00,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:00,583 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 715108594, now seen corresponding path program 41 times [2022-03-01 18:16:00,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:00,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845056605] [2022-03-01 18:16:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:00,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:00,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845056605] [2022-03-01 18:16:00,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845056605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:00,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762196789] [2022-03-01 18:16:00,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:00,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:00,838 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) [2022-03-01 18:16:00,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:16:00,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:16:00,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:01,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:01,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:01,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:01,436 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:01,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:01,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:01,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:01,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:01,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762196789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:01,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:01,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:16:01,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68036020] [2022-03-01 18:16:01,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:01,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:01,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:01,637 INFO L87 Difference]: Start difference. First operand 975 states and 2389 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:16:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:03,106 INFO L93 Difference]: Finished difference Result 1393 states and 3309 transitions. [2022-03-01 18:16:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:16:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-01 18:16:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:03,109 INFO L225 Difference]: With dead ends: 1393 [2022-03-01 18:16:03,109 INFO L226 Difference]: Without dead ends: 1379 [2022-03-01 18:16:03,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=3252, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:16:03,110 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:03,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 98 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 460 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-03-01 18:16:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-03-01 18:16:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 970. [2022-03-01 18:16:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.454076367389061) internal successors, (2378), 969 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2378 transitions. [2022-03-01 18:16:03,124 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2378 transitions. Word has length 26 [2022-03-01 18:16:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:03,124 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2378 transitions. [2022-03-01 18:16:03,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:16:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2378 transitions. [2022-03-01 18:16:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:03,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:03,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:03,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:03,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:03,350 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -597566298, now seen corresponding path program 42 times [2022-03-01 18:16:03,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:03,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084062600] [2022-03-01 18:16:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:03,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:03,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084062600] [2022-03-01 18:16:03,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084062600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:03,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215275779] [2022-03-01 18:16:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:16:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:03,625 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) [2022-03-01 18:16:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:16:03,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:16:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:03,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:03,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:03,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:03,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:03,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:04,182 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:04,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:04,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:04,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215275779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:04,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:04,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:16:04,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607167547] [2022-03-01 18:16:04,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:04,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:04,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:04,372 INFO L87 Difference]: Start difference. First operand 970 states and 2378 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:06,231 INFO L93 Difference]: Finished difference Result 1579 states and 3725 transitions. [2022-03-01 18:16:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:16:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:06,235 INFO L225 Difference]: With dead ends: 1579 [2022-03-01 18:16:06,235 INFO L226 Difference]: Without dead ends: 1556 [2022-03-01 18:16:06,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:16:06,236 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 171 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:06,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 179 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:16:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-01 18:16:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1009. [2022-03-01 18:16:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.4603174603174605) internal successors, (2480), 1008 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2480 transitions. [2022-03-01 18:16:06,259 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2480 transitions. Word has length 26 [2022-03-01 18:16:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2480 transitions. [2022-03-01 18:16:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2480 transitions. [2022-03-01 18:16:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:06,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:06,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:06,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 18:16:06,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:16:06,461 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 707454872, now seen corresponding path program 43 times [2022-03-01 18:16:06,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:06,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299380483] [2022-03-01 18:16:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:06,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:06,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299380483] [2022-03-01 18:16:06,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299380483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:06,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566524119] [2022-03-01 18:16:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:06,730 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) [2022-03-01 18:16:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:16:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:06,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:07,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:07,314 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:07,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:07,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:07,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566524119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:07,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:07,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:16:07,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291938716] [2022-03-01 18:16:07,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:07,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:07,490 INFO L87 Difference]: Start difference. First operand 1009 states and 2480 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:16:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:08,866 INFO L93 Difference]: Finished difference Result 1387 states and 3307 transitions. [2022-03-01 18:16:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 26 [2022-03-01 18:16:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:08,869 INFO L225 Difference]: With dead ends: 1387 [2022-03-01 18:16:08,869 INFO L226 Difference]: Without dead ends: 1342 [2022-03-01 18:16:08,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=451, Invalid=2519, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:16:08,870 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:08,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 140 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 663 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-03-01 18:16:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-03-01 18:16:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 993. [2022-03-01 18:16:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 2.467741935483871) internal successors, (2448), 992 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2448 transitions. [2022-03-01 18:16:08,889 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2448 transitions. Word has length 26 [2022-03-01 18:16:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:08,889 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2448 transitions. [2022-03-01 18:16:08,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:16:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2448 transitions. [2022-03-01 18:16:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:08,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:08,891 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:08,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 18:16:09,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 18:16:09,114 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:09,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash 277025134, now seen corresponding path program 44 times [2022-03-01 18:16:09,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:09,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585043993] [2022-03-01 18:16:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:09,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:09,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585043993] [2022-03-01 18:16:09,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585043993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:09,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555135460] [2022-03-01 18:16:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:09,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:09,354 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) [2022-03-01 18:16:09,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:16:09,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:09,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:09,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:09,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:09,911 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:09,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:10,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:10,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-01 18:16:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:10,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555135460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:10,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:10,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-01 18:16:10,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883149018] [2022-03-01 18:16:10,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:10,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:16:10,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:16:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:16:10,100 INFO L87 Difference]: Start difference. First operand 993 states and 2448 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:11,104 INFO L93 Difference]: Finished difference Result 1343 states and 3128 transitions. [2022-03-01 18:16:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:16:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:11,107 INFO L225 Difference]: With dead ends: 1343 [2022-03-01 18:16:11,108 INFO L226 Difference]: Without dead ends: 1285 [2022-03-01 18:16:11,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:16:11,108 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 230 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:11,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 212 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 899 Invalid, 0 Unknown, 11 Unchecked, 0.4s Time] [2022-03-01 18:16:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-01 18:16:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1081. [2022-03-01 18:16:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.4805555555555556) internal successors, (2679), 1080 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2679 transitions. [2022-03-01 18:16:11,128 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2679 transitions. Word has length 26 [2022-03-01 18:16:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:11,128 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2679 transitions. [2022-03-01 18:16:11,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2679 transitions. [2022-03-01 18:16:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:11,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:11,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:11,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:11,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 18:16:11,343 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1792998102, now seen corresponding path program 45 times [2022-03-01 18:16:11,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:11,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137350218] [2022-03-01 18:16:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:11,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:11,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137350218] [2022-03-01 18:16:11,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137350218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:11,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585149357] [2022-03-01 18:16:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:16:11,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:11,636 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) [2022-03-01 18:16:11,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:16:11,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:16:11,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:11,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:16:11,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:12,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:12,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:12,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-01 18:16:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:12,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:12,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:12,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:12,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-01 18:16:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:15,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585149357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:15,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:15,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-01 18:16:15,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326778295] [2022-03-01 18:16:15,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:15,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:16:15,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:16:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:16:15,008 INFO L87 Difference]: Start difference. First operand 1081 states and 2679 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2022-03-01 18:16:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:21,527 INFO L93 Difference]: Finished difference Result 2055 states and 4788 transitions. [2022-03-01 18:16:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:16:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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 26 [2022-03-01 18:16:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:21,532 INFO L225 Difference]: With dead ends: 2055 [2022-03-01 18:16:21,532 INFO L226 Difference]: Without dead ends: 1985 [2022-03-01 18:16:21,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2012, Invalid=12508, Unknown=0, NotChecked=0, Total=14520 [2022-03-01 18:16:21,534 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 388 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:21,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1690 Invalid, 0 Unknown, 270 Unchecked, 0.9s Time] [2022-03-01 18:16:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-01 18:16:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1177. [2022-03-01 18:16:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.5008503401360542) internal successors, (2941), 1176 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2941 transitions. [2022-03-01 18:16:21,559 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2941 transitions. Word has length 26 [2022-03-01 18:16:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:21,560 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2941 transitions. [2022-03-01 18:16:21,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2022-03-01 18:16:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2941 transitions. [2022-03-01 18:16:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:21,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:21,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:21,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:21,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:21,785 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash 771199462, now seen corresponding path program 46 times [2022-03-01 18:16:21,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:21,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188752381] [2022-03-01 18:16:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:22,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:22,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188752381] [2022-03-01 18:16:22,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188752381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:22,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130543350] [2022-03-01 18:16:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:22,051 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) [2022-03-01 18:16:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:16:22,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:22,610 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:22,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:22,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:22,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130543350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:22,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:22,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-01 18:16:22,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614253983] [2022-03-01 18:16:22,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:22,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:22,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:22,859 INFO L87 Difference]: Start difference. First operand 1177 states and 2941 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:24,754 INFO L93 Difference]: Finished difference Result 1541 states and 3710 transitions. [2022-03-01 18:16:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:16:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:24,757 INFO L225 Difference]: With dead ends: 1541 [2022-03-01 18:16:24,757 INFO L226 Difference]: Without dead ends: 1473 [2022-03-01 18:16:24,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=540, Invalid=3620, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:16:24,758 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:24,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 181 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:16:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-03-01 18:16:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1230. [2022-03-01 18:16:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.48006509357201) internal successors, (3048), 1229 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3048 transitions. [2022-03-01 18:16:24,784 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3048 transitions. Word has length 26 [2022-03-01 18:16:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:24,785 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 3048 transitions. [2022-03-01 18:16:24,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3048 transitions. [2022-03-01 18:16:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:24,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:24,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:24,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 18:16:24,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:24,987 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291350, now seen corresponding path program 47 times [2022-03-01 18:16:24,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:24,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078103487] [2022-03-01 18:16:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:25,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:25,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078103487] [2022-03-01 18:16:25,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078103487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:25,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113631002] [2022-03-01 18:16:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:25,231 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) [2022-03-01 18:16:25,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:16:25,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:16:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:25,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:25,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:25,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:25,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:25,820 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:25,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:26,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:26,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113631002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:26,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:26,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-01 18:16:26,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166858796] [2022-03-01 18:16:26,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:26,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:26,086 INFO L87 Difference]: Start difference. First operand 1230 states and 3048 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:28,050 INFO L93 Difference]: Finished difference Result 1414 states and 3424 transitions. [2022-03-01 18:16:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 18:16:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:28,055 INFO L225 Difference]: With dead ends: 1414 [2022-03-01 18:16:28,055 INFO L226 Difference]: Without dead ends: 1388 [2022-03-01 18:16:28,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:16:28,056 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 150 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 226 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:16:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-03-01 18:16:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1244. [2022-03-01 18:16:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.474658085277554) internal successors, (3076), 1243 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3076 transitions. [2022-03-01 18:16:28,077 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3076 transitions. Word has length 26 [2022-03-01 18:16:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:28,077 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 3076 transitions. [2022-03-01 18:16:28,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3076 transitions. [2022-03-01 18:16:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:28,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:28,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:28,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:28,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:28,286 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -509922762, now seen corresponding path program 48 times [2022-03-01 18:16:28,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:28,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054775285] [2022-03-01 18:16:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:28,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:28,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054775285] [2022-03-01 18:16:28,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054775285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:28,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605065350] [2022-03-01 18:16:28,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:16:28,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:28,564 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) [2022-03-01 18:16:28,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:16:28,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:16:28,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:28,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:28,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:28,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:28,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:28,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:28,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:29,188 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:29,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:29,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:29,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:29,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605065350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:29,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:29,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-01 18:16:29,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435157767] [2022-03-01 18:16:29,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:29,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:29,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:29,437 INFO L87 Difference]: Start difference. First operand 1244 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:16:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:30,802 INFO L93 Difference]: Finished difference Result 1765 states and 4214 transitions. [2022-03-01 18:16:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 26 [2022-03-01 18:16:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:30,806 INFO L225 Difference]: With dead ends: 1765 [2022-03-01 18:16:30,807 INFO L226 Difference]: Without dead ends: 1740 [2022-03-01 18:16:30,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:16:30,808 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:30,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 249 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-03-01 18:16:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-03-01 18:16:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1287. [2022-03-01 18:16:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.4805598755832037) internal successors, (3190), 1286 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3190 transitions. [2022-03-01 18:16:30,829 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3190 transitions. Word has length 26 [2022-03-01 18:16:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:30,829 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3190 transitions. [2022-03-01 18:16:30,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 18:16:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3190 transitions. [2022-03-01 18:16:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:30,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:30,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:30,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-01 18:16:31,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 18:16:31,031 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1776670478, now seen corresponding path program 49 times [2022-03-01 18:16:31,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:31,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261462121] [2022-03-01 18:16:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:31,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:31,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:31,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261462121] [2022-03-01 18:16:31,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261462121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:31,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631508727] [2022-03-01 18:16:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:31,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:31,290 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) [2022-03-01 18:16:31,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:16:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:31,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:31,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:31,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:31,890 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:31,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:32,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:32,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-01 18:16:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:32,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631508727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:32,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:32,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-01 18:16:32,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602867157] [2022-03-01 18:16:32,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:16:32,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:16:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:16:32,095 INFO L87 Difference]: Start difference. First operand 1287 states and 3190 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:33,267 INFO L93 Difference]: Finished difference Result 1693 states and 3972 transitions. [2022-03-01 18:16:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:33,270 INFO L225 Difference]: With dead ends: 1693 [2022-03-01 18:16:33,270 INFO L226 Difference]: Without dead ends: 1659 [2022-03-01 18:16:33,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:16:33,271 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:33,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 263 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 973 Invalid, 0 Unknown, 16 Unchecked, 0.5s Time] [2022-03-01 18:16:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-03-01 18:16:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1368. [2022-03-01 18:16:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 2.5003657644476958) internal successors, (3418), 1367 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 3418 transitions. [2022-03-01 18:16:33,295 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 3418 transitions. Word has length 26 [2022-03-01 18:16:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 3418 transitions. [2022-03-01 18:16:33,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 3418 transitions. [2022-03-01 18:16:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:33,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:33,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:33,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:33,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 18:16:33,511 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash -719982534, now seen corresponding path program 50 times [2022-03-01 18:16:33,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:33,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356191392] [2022-03-01 18:16:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:33,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:33,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356191392] [2022-03-01 18:16:33,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356191392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:33,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195665691] [2022-03-01 18:16:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:33,756 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) [2022-03-01 18:16:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:16:33,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:34,363 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:34,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:34,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-01 18:16:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:34,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195665691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:34,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:34,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-01 18:16:34,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94898703] [2022-03-01 18:16:34,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:34,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:16:34,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:16:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:16:34,567 INFO L87 Difference]: Start difference. First operand 1368 states and 3418 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-03-01 18:16:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:35,634 INFO L93 Difference]: Finished difference Result 1665 states and 3913 transitions. [2022-03-01 18:16:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:16:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 26 [2022-03-01 18:16:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:35,637 INFO L225 Difference]: With dead ends: 1665 [2022-03-01 18:16:35,637 INFO L226 Difference]: Without dead ends: 1662 [2022-03-01 18:16:35,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:16:35,638 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:35,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 234 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 940 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-03-01 18:16:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-03-01 18:16:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1364. [2022-03-01 18:16:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.5018341892883345) internal successors, (3410), 1363 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3410 transitions. [2022-03-01 18:16:35,663 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3410 transitions. Word has length 26 [2022-03-01 18:16:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:35,663 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3410 transitions. [2022-03-01 18:16:35,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-03-01 18:16:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3410 transitions. [2022-03-01 18:16:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:35,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:35,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:35,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:35,889 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1113980334, now seen corresponding path program 51 times [2022-03-01 18:16:35,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:35,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923609299] [2022-03-01 18:16:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:36,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923609299] [2022-03-01 18:16:36,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923609299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083455131] [2022-03-01 18:16:36,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:16:36,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:36,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:36,156 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:36,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:16:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:16:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:36,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:16:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:36,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:36,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:36,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-01 18:16:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:37,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:37,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:37,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:37,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:37,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:16:37,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-01 18:16:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:40,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083455131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:40,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:40,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-01 18:16:40,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624291448] [2022-03-01 18:16:40,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:40,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:16:40,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:16:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:16:40,005 INFO L87 Difference]: Start difference. First operand 1364 states and 3410 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2022-03-01 18:16:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:44,855 INFO L93 Difference]: Finished difference Result 2389 states and 5627 transitions. [2022-03-01 18:16:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:16:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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 26 [2022-03-01 18:16:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:44,859 INFO L225 Difference]: With dead ends: 2389 [2022-03-01 18:16:44,859 INFO L226 Difference]: Without dead ends: 2321 [2022-03-01 18:16:44,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1586, Invalid=8314, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 18:16:44,860 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 409 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:44,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 366 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1293 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2022-03-01 18:16:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-03-01 18:16:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1406. [2022-03-01 18:16:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 2.498932384341637) internal successors, (3511), 1405 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 3511 transitions. [2022-03-01 18:16:44,884 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 3511 transitions. Word has length 26 [2022-03-01 18:16:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:44,884 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 3511 transitions. [2022-03-01 18:16:44,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 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) [2022-03-01 18:16:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 3511 transitions. [2022-03-01 18:16:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:44,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:44,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:44,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 18:16:45,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 18:16:45,086 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -3388566, now seen corresponding path program 52 times [2022-03-01 18:16:45,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:45,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246504807] [2022-03-01 18:16:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:45,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:45,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246504807] [2022-03-01 18:16:45,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246504807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:45,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801491217] [2022-03-01 18:16:45,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:45,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:45,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:45,331 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:45,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:16:45,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:45,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:45,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:45,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:45,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:45,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:45,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:45,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:45,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:45,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:45,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:45,888 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:45,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:46,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:46,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801491217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:46,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:46,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-01 18:16:46,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604520715] [2022-03-01 18:16:46,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:46,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:46,138 INFO L87 Difference]: Start difference. First operand 1406 states and 3511 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:47,741 INFO L93 Difference]: Finished difference Result 1692 states and 4095 transitions. [2022-03-01 18:16:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:16:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:47,744 INFO L225 Difference]: With dead ends: 1692 [2022-03-01 18:16:47,744 INFO L226 Difference]: Without dead ends: 1608 [2022-03-01 18:16:47,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:16:47,745 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:47,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 181 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:16:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-03-01 18:16:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1433. [2022-03-01 18:16:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.4797486033519553) internal successors, (3551), 1432 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3551 transitions. [2022-03-01 18:16:47,761 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3551 transitions. Word has length 26 [2022-03-01 18:16:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 3551 transitions. [2022-03-01 18:16:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3551 transitions. [2022-03-01 18:16:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:16:47,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:47,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:47,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 18:16:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 18:16:47,964 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 908041902, now seen corresponding path program 53 times [2022-03-01 18:16:47,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:47,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807630780] [2022-03-01 18:16:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:48,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:48,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807630780] [2022-03-01 18:16:48,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807630780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:48,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435477463] [2022-03-01 18:16:48,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:48,236 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:48,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:16:48,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:16:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:16:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:48,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:48,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:48,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:48,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-01 18:16:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:48,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:48,855 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-01 18:16:48,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-01 18:16:49,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:16:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:16:49,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-01 18:16:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:49,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435477463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:49,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:49,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-01 18:16:49,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223726592] [2022-03-01 18:16:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:49,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:49,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:49,106 INFO L87 Difference]: Start difference. First operand 1433 states and 3551 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:50,573 INFO L93 Difference]: Finished difference Result 1636 states and 3970 transitions. [2022-03-01 18:16:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:16:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 18:16:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:50,576 INFO L225 Difference]: With dead ends: 1636 [2022-03-01 18:16:50,576 INFO L226 Difference]: Without dead ends: 1626 [2022-03-01 18:16:50,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:16:50,576 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 186 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:16:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-03-01 18:16:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1442. [2022-03-01 18:16:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.479528105482304) internal successors, (3573), 1441 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3573 transitions. [2022-03-01 18:16:50,594 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3573 transitions. Word has length 26 [2022-03-01 18:16:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:50,594 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3573 transitions. [2022-03-01 18:16:50,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3573 transitions. [2022-03-01 18:16:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:50,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:50,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:50,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 18:16:50,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:50,797 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1403227622, now seen corresponding path program 54 times [2022-03-01 18:16:50,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:50,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426678422] [2022-03-01 18:16:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:50,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:50,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426678422] [2022-03-01 18:16:50,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426678422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:50,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366255124] [2022-03-01 18:16:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:16:50,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:50,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:50,904 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:50,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:16:50,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:16:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:51,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366255124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:51,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:51,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-01 18:16:51,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088010689] [2022-03-01 18:16:51,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:51,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:51,225 INFO L87 Difference]: Start difference. First operand 1442 states and 3573 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-01 18:16:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:52,143 INFO L93 Difference]: Finished difference Result 2062 states and 4783 transitions. [2022-03-01 18:16:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 18:16:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 28 [2022-03-01 18:16:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:52,146 INFO L225 Difference]: With dead ends: 2062 [2022-03-01 18:16:52,146 INFO L226 Difference]: Without dead ends: 2062 [2022-03-01 18:16:52,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:16:52,148 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 218 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:52,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 168 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:16:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-03-01 18:16:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1289. [2022-03-01 18:16:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 2.482919254658385) internal successors, (3198), 1288 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 3198 transitions. [2022-03-01 18:16:52,174 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 3198 transitions. Word has length 28 [2022-03-01 18:16:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:52,174 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 3198 transitions. [2022-03-01 18:16:52,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-03-01 18:16:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 3198 transitions. [2022-03-01 18:16:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:52,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:52,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:52,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 18:16:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:52,377 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1901754846, now seen corresponding path program 55 times [2022-03-01 18:16:52,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:52,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064275145] [2022-03-01 18:16:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:52,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064275145] [2022-03-01 18:16:52,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064275145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901523197] [2022-03-01 18:16:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:16:52,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:52,472 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:52,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:16:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:52,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:52,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901523197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:52,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:52,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:16:52,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331188262] [2022-03-01 18:16:52,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:52,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:52,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:52,780 INFO L87 Difference]: Start difference. First operand 1289 states and 3198 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:53,715 INFO L93 Difference]: Finished difference Result 2310 states and 5344 transitions. [2022-03-01 18:16:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:16:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:16:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:53,718 INFO L225 Difference]: With dead ends: 2310 [2022-03-01 18:16:53,718 INFO L226 Difference]: Without dead ends: 2239 [2022-03-01 18:16:53,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:16:53,719 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 416 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:53,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 177 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-03-01 18:16:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1468. [2022-03-01 18:16:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 2.496932515337423) internal successors, (3663), 1467 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3663 transitions. [2022-03-01 18:16:53,752 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3663 transitions. Word has length 28 [2022-03-01 18:16:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:53,752 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 3663 transitions. [2022-03-01 18:16:53,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3663 transitions. [2022-03-01 18:16:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:53,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:53,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:53,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 18:16:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:16:53,955 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2007391006, now seen corresponding path program 56 times [2022-03-01 18:16:53,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:53,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429371759] [2022-03-01 18:16:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:54,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:54,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429371759] [2022-03-01 18:16:54,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429371759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:54,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749689276] [2022-03-01 18:16:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:16:54,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:54,039 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:54,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:16:54,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:16:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:54,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:54,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749689276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:54,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:54,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-03-01 18:16:54,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096757878] [2022-03-01 18:16:54,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:54,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:16:54,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:16:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:16:54,501 INFO L87 Difference]: Start difference. First operand 1468 states and 3663 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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) [2022-03-01 18:16:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:55,758 INFO L93 Difference]: Finished difference Result 2686 states and 6345 transitions. [2022-03-01 18:16:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 18:16:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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 28 [2022-03-01 18:16:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:55,762 INFO L225 Difference]: With dead ends: 2686 [2022-03-01 18:16:55,762 INFO L226 Difference]: Without dead ends: 2682 [2022-03-01 18:16:55,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-03-01 18:16:55,763 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 371 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:55,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 231 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:16:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-03-01 18:16:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1786. [2022-03-01 18:16:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.5126050420168067) internal successors, (4485), 1785 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4485 transitions. [2022-03-01 18:16:55,788 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4485 transitions. Word has length 28 [2022-03-01 18:16:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:55,788 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4485 transitions. [2022-03-01 18:16:55,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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) [2022-03-01 18:16:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4485 transitions. [2022-03-01 18:16:55,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:55,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:55,791 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:55,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 18:16:55,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:55,993 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1955897502, now seen corresponding path program 57 times [2022-03-01 18:16:55,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:55,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807472172] [2022-03-01 18:16:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:56,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:56,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807472172] [2022-03-01 18:16:56,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807472172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:56,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429584620] [2022-03-01 18:16:56,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:16:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:56,066 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:56,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:16:56,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:16:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:56,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:56,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429584620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:56,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:56,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 18:16:56,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057702094] [2022-03-01 18:16:56,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:56,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:56,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:56,416 INFO L87 Difference]: Start difference. First operand 1786 states and 4485 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-01 18:16:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:57,085 INFO L93 Difference]: Finished difference Result 2073 states and 5023 transitions. [2022-03-01 18:16:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:16:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 28 [2022-03-01 18:16:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:57,088 INFO L225 Difference]: With dead ends: 2073 [2022-03-01 18:16:57,088 INFO L226 Difference]: Without dead ends: 2069 [2022-03-01 18:16:57,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:16:57,089 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:57,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 97 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:16:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-03-01 18:16:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1761. [2022-03-01 18:16:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.513068181818182) internal successors, (4423), 1760 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4423 transitions. [2022-03-01 18:16:57,109 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4423 transitions. Word has length 28 [2022-03-01 18:16:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:57,121 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4423 transitions. [2022-03-01 18:16:57,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-01 18:16:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4423 transitions. [2022-03-01 18:16:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:57,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:57,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:57,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:16:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-01 18:16:57,324 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1571411288, now seen corresponding path program 58 times [2022-03-01 18:16:57,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:57,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685260048] [2022-03-01 18:16:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:16:57,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:57,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685260048] [2022-03-01 18:16:57,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685260048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:57,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142486701] [2022-03-01 18:16:57,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:16:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:57,399 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:57,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:16:57,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:16:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:57,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:57,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142486701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:57,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:57,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 18:16:57,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034512076] [2022-03-01 18:16:57,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:57,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:57,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:57,825 INFO L87 Difference]: Start difference. First operand 1761 states and 4423 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-03-01 18:16:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:16:58,527 INFO L93 Difference]: Finished difference Result 2379 states and 5765 transitions. [2022-03-01 18:16:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:16:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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 28 [2022-03-01 18:16:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:16:58,530 INFO L225 Difference]: With dead ends: 2379 [2022-03-01 18:16:58,531 INFO L226 Difference]: Without dead ends: 2367 [2022-03-01 18:16:58,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:16:58,531 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:16:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 101 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:16:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-03-01 18:16:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1864. [2022-03-01 18:16:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.526033279656468) internal successors, (4706), 1863 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:16:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4706 transitions. [2022-03-01 18:16:58,560 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4706 transitions. Word has length 28 [2022-03-01 18:16:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:16:58,560 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4706 transitions. [2022-03-01 18:16:58,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 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) [2022-03-01 18:16:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4706 transitions. [2022-03-01 18:16:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:16:58,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:16:58,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:16:58,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 18:16:58,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-01 18:16:58,775 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:16:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:16:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1126878266, now seen corresponding path program 59 times [2022-03-01 18:16:58,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:16:58,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459317169] [2022-03-01 18:16:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:16:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:16:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:16:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:58,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:16:58,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459317169] [2022-03-01 18:16:58,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459317169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:16:58,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425768955] [2022-03-01 18:16:58,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:16:58,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:16:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:16:58,854 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:16:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:16:58,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 18:16:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:16:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:16:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:16:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:59,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:16:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:16:59,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425768955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:16:59,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:16:59,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 18:16:59,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460821629] [2022-03-01 18:16:59,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:16:59,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:16:59,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:16:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:16:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:16:59,292 INFO L87 Difference]: Start difference. First operand 1864 states and 4706 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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) [2022-03-01 18:17:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:00,002 INFO L93 Difference]: Finished difference Result 2488 states and 5987 transitions. [2022-03-01 18:17:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:17:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 28 [2022-03-01 18:17:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:00,007 INFO L225 Difference]: With dead ends: 2488 [2022-03-01 18:17:00,007 INFO L226 Difference]: Without dead ends: 2474 [2022-03-01 18:17:00,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:17:00,008 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 141 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-01 18:17:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1917. [2022-03-01 18:17:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.5328810020876826) internal successors, (4853), 1916 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 4853 transitions. [2022-03-01 18:17:00,034 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 4853 transitions. Word has length 28 [2022-03-01 18:17:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 4853 transitions. [2022-03-01 18:17:00,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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) [2022-03-01 18:17:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 4853 transitions. [2022-03-01 18:17:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:00,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:00,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:00,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 18:17:00,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:00,237 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash 681233606, now seen corresponding path program 60 times [2022-03-01 18:17:00,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:00,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611698327] [2022-03-01 18:17:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:00,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:00,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611698327] [2022-03-01 18:17:00,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611698327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:00,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231713644] [2022-03-01 18:17:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:00,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:00,315 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:00,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:17:00,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 18:17:00,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:00,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:00,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231713644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:00,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:00,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 18:17:00,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608982060] [2022-03-01 18:17:00,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:00,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:00,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:00,654 INFO L87 Difference]: Start difference. First operand 1917 states and 4853 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:01,375 INFO L93 Difference]: Finished difference Result 2707 states and 6510 transitions. [2022-03-01 18:17:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:17:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:17:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:01,380 INFO L225 Difference]: With dead ends: 2707 [2022-03-01 18:17:01,380 INFO L226 Difference]: Without dead ends: 2685 [2022-03-01 18:17:01,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:17:01,380 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:01,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 136 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2022-03-01 18:17:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1814. [2022-03-01 18:17:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.518477661334804) internal successors, (4566), 1813 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4566 transitions. [2022-03-01 18:17:01,411 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4566 transitions. Word has length 28 [2022-03-01 18:17:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:01,411 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 4566 transitions. [2022-03-01 18:17:01,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4566 transitions. [2022-03-01 18:17:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:01,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:01,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:01,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:01,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:01,614 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1834776692, now seen corresponding path program 61 times [2022-03-01 18:17:01,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:01,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330819718] [2022-03-01 18:17:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:01,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:01,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330819718] [2022-03-01 18:17:01,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330819718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:01,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820319414] [2022-03-01 18:17:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:01,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:01,695 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:17:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:02,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820319414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:02,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:02,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:17:02,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838984078] [2022-03-01 18:17:02,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:02,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:17:02,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:17:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:17:02,043 INFO L87 Difference]: Start difference. First operand 1814 states and 4566 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2022-03-01 18:17:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:03,057 INFO L93 Difference]: Finished difference Result 2769 states and 6415 transitions. [2022-03-01 18:17:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:17:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 28 [2022-03-01 18:17:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:03,061 INFO L225 Difference]: With dead ends: 2769 [2022-03-01 18:17:03,061 INFO L226 Difference]: Without dead ends: 2769 [2022-03-01 18:17:03,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1438, Invalid=3964, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:17:03,062 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 348 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:03,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 231 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-03-01 18:17:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1600. [2022-03-01 18:17:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4809255784865543) internal successors, (3967), 1599 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3967 transitions. [2022-03-01 18:17:03,090 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3967 transitions. Word has length 28 [2022-03-01 18:17:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:03,091 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3967 transitions. [2022-03-01 18:17:03,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2022-03-01 18:17:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3967 transitions. [2022-03-01 18:17:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:03,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:03,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:03,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 18:17:03,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 18:17:03,294 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1049648184, now seen corresponding path program 62 times [2022-03-01 18:17:03,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:03,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70151570] [2022-03-01 18:17:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:03,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:03,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:03,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70151570] [2022-03-01 18:17:03,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70151570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:03,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524379386] [2022-03-01 18:17:03,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:03,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:03,379 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:03,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:17:03,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:03,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:03,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:03,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524379386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:03,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:03,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 18:17:03,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457036687] [2022-03-01 18:17:03,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:03,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:03,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:03,775 INFO L87 Difference]: Start difference. First operand 1600 states and 3967 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:04,456 INFO L93 Difference]: Finished difference Result 2024 states and 4735 transitions. [2022-03-01 18:17:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:17:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:17:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:04,459 INFO L225 Difference]: With dead ends: 2024 [2022-03-01 18:17:04,459 INFO L226 Difference]: Without dead ends: 1985 [2022-03-01 18:17:04,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:17:04,460 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:04,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 181 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-01 18:17:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1546. [2022-03-01 18:17:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.4679611650485436) internal successors, (3813), 1545 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3813 transitions. [2022-03-01 18:17:04,479 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3813 transitions. Word has length 28 [2022-03-01 18:17:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 3813 transitions. [2022-03-01 18:17:04,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3813 transitions. [2022-03-01 18:17:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:04,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:04,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:04,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 18:17:04,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 18:17:04,682 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1729324172, now seen corresponding path program 63 times [2022-03-01 18:17:04,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:04,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189815369] [2022-03-01 18:17:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:04,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:04,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189815369] [2022-03-01 18:17:04,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189815369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:04,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730542312] [2022-03-01 18:17:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:04,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:04,754 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:04,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:17:04,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:17:04,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:04,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:05,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730542312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:05,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:05,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-01 18:17:05,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693890727] [2022-03-01 18:17:05,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:17:05,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:17:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:17:05,114 INFO L87 Difference]: Start difference. First operand 1546 states and 3813 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:17:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:06,306 INFO L93 Difference]: Finished difference Result 2758 states and 6361 transitions. [2022-03-01 18:17:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:17:06,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 28 [2022-03-01 18:17:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:06,310 INFO L225 Difference]: With dead ends: 2758 [2022-03-01 18:17:06,310 INFO L226 Difference]: Without dead ends: 2758 [2022-03-01 18:17:06,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:17:06,311 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 336 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:06,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 255 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2022-03-01 18:17:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1630. [2022-03-01 18:17:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.4487415592387967) internal successors, (3989), 1629 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 3989 transitions. [2022-03-01 18:17:06,339 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 3989 transitions. Word has length 28 [2022-03-01 18:17:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:06,339 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 3989 transitions. [2022-03-01 18:17:06,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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) [2022-03-01 18:17:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 3989 transitions. [2022-03-01 18:17:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:06,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:06,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:06,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:06,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:06,542 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash -819162124, now seen corresponding path program 64 times [2022-03-01 18:17:06,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:06,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438304996] [2022-03-01 18:17:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:06,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:06,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438304996] [2022-03-01 18:17:06,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438304996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:06,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660606636] [2022-03-01 18:17:06,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:06,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:06,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:06,615 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:06,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:17:06,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:06,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:06,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:06,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660606636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:06,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:06,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 18:17:06,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030421476] [2022-03-01 18:17:06,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:06,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:06,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:06,949 INFO L87 Difference]: Start difference. First operand 1630 states and 3989 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:07,593 INFO L93 Difference]: Finished difference Result 1964 states and 4612 transitions. [2022-03-01 18:17:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:17:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:17:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:07,596 INFO L225 Difference]: With dead ends: 1964 [2022-03-01 18:17:07,596 INFO L226 Difference]: Without dead ends: 1946 [2022-03-01 18:17:07,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:17:07,597 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:07,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 122 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-01 18:17:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1629. [2022-03-01 18:17:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.447788697788698) internal successors, (3985), 1628 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3985 transitions. [2022-03-01 18:17:07,615 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3985 transitions. Word has length 28 [2022-03-01 18:17:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:07,615 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 3985 transitions. [2022-03-01 18:17:07,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3985 transitions. [2022-03-01 18:17:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:07,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:07,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:07,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 18:17:07,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 18:17:07,818 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 617050672, now seen corresponding path program 65 times [2022-03-01 18:17:07,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:07,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024515936] [2022-03-01 18:17:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:07,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:07,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:07,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024515936] [2022-03-01 18:17:07,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024515936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:07,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689587503] [2022-03-01 18:17:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:07,899 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:17:07,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:17:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:08,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:08,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689587503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:08,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:08,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-03-01 18:17:08,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917702556] [2022-03-01 18:17:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:08,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:17:08,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:17:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:17:08,275 INFO L87 Difference]: Start difference. First operand 1629 states and 3985 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:09,663 INFO L93 Difference]: Finished difference Result 3359 states and 7975 transitions. [2022-03-01 18:17:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 18:17:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:17:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:09,667 INFO L225 Difference]: With dead ends: 3359 [2022-03-01 18:17:09,668 INFO L226 Difference]: Without dead ends: 3359 [2022-03-01 18:17:09,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 18:17:09,669 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:09,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 214 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2022-03-01 18:17:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2498. [2022-03-01 18:17:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.528233880656788) internal successors, (6313), 2497 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 6313 transitions. [2022-03-01 18:17:09,707 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 6313 transitions. Word has length 28 [2022-03-01 18:17:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:09,707 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 6313 transitions. [2022-03-01 18:17:09,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 6313 transitions. [2022-03-01 18:17:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:09,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:09,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:09,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 18:17:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 18:17:09,911 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1135030552, now seen corresponding path program 66 times [2022-03-01 18:17:09,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:09,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097808957] [2022-03-01 18:17:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:09,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:09,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:09,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097808957] [2022-03-01 18:17:09,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097808957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:09,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705291853] [2022-03-01 18:17:09,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:09,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:09,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:09,973 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:09,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:17:09,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:17:09,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:10,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:10,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705291853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:10,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:10,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 18:17:10,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528281322] [2022-03-01 18:17:10,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:10,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:10,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:10,334 INFO L87 Difference]: Start difference. First operand 2498 states and 6313 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-01 18:17:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:11,272 INFO L93 Difference]: Finished difference Result 3045 states and 7377 transitions. [2022-03-01 18:17:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:17:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 28 [2022-03-01 18:17:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:11,277 INFO L225 Difference]: With dead ends: 3045 [2022-03-01 18:17:11,277 INFO L226 Difference]: Without dead ends: 3041 [2022-03-01 18:17:11,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:17:11,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 341 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:11,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 86 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-01 18:17:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2472. [2022-03-01 18:17:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.525698097936058) internal successors, (6241), 2471 states have internal predecessors, (6241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6241 transitions. [2022-03-01 18:17:11,312 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6241 transitions. Word has length 28 [2022-03-01 18:17:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:11,313 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 6241 transitions. [2022-03-01 18:17:11,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-03-01 18:17:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6241 transitions. [2022-03-01 18:17:11,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:11,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:11,315 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:11,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 18:17:11,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:11,516 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1641376818, now seen corresponding path program 67 times [2022-03-01 18:17:11,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:11,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441855216] [2022-03-01 18:17:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:11,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:11,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:11,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441855216] [2022-03-01 18:17:11,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441855216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:11,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910324217] [2022-03-01 18:17:11,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:11,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:11,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:11,591 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:11,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:17:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:11,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:11,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910324217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:11,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:11,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 18:17:11,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114545883] [2022-03-01 18:17:11,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:11,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:11,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:11,952 INFO L87 Difference]: Start difference. First operand 2472 states and 6241 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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) [2022-03-01 18:17:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:12,805 INFO L93 Difference]: Finished difference Result 3267 states and 7923 transitions. [2022-03-01 18:17:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:17:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 28 [2022-03-01 18:17:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:12,809 INFO L225 Difference]: With dead ends: 3267 [2022-03-01 18:17:12,809 INFO L226 Difference]: Without dead ends: 3255 [2022-03-01 18:17:12,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:17:12,810 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 311 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:12,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 95 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-03-01 18:17:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2666. [2022-03-01 18:17:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.5395872420262666) internal successors, (6768), 2665 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 6768 transitions. [2022-03-01 18:17:12,848 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 6768 transitions. Word has length 28 [2022-03-01 18:17:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:12,848 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 6768 transitions. [2022-03-01 18:17:12,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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) [2022-03-01 18:17:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 6768 transitions. [2022-03-01 18:17:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:12,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:12,851 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:12,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 18:17:13,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-01 18:17:13,052 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1868598198, now seen corresponding path program 68 times [2022-03-01 18:17:13,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:13,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026050038] [2022-03-01 18:17:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:13,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:13,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026050038] [2022-03-01 18:17:13,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026050038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:13,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690066495] [2022-03-01 18:17:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:13,134 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:13,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:17:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:13,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:13,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690066495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:13,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:13,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 18:17:13,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406707751] [2022-03-01 18:17:13,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:13,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:13,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:13,527 INFO L87 Difference]: Start difference. First operand 2666 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:14,432 INFO L93 Difference]: Finished difference Result 3608 states and 8768 transitions. [2022-03-01 18:17:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:17:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 18:17:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:14,437 INFO L225 Difference]: With dead ends: 3608 [2022-03-01 18:17:14,437 INFO L226 Difference]: Without dead ends: 3588 [2022-03-01 18:17:14,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:17:14,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 305 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:14,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 121 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-03-01 18:17:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2939. [2022-03-01 18:17:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 2.5517358747447245) internal successors, (7497), 2938 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 7497 transitions. [2022-03-01 18:17:14,483 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 7497 transitions. Word has length 28 [2022-03-01 18:17:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 7497 transitions. [2022-03-01 18:17:14,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 7497 transitions. [2022-03-01 18:17:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 18:17:14,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:14,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:14,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-01 18:17:14,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:14,687 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1185012282, now seen corresponding path program 69 times [2022-03-01 18:17:14,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:14,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957805950] [2022-03-01 18:17:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:14,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:14,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957805950] [2022-03-01 18:17:14,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957805950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:14,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599471945] [2022-03-01 18:17:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:14,759 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:14,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:17:14,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:17:14,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:14,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 18:17:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:15,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599471945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:15,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:15,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:17:15,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995736080] [2022-03-01 18:17:15,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:15,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:17:15,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:17:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:15,070 INFO L87 Difference]: Start difference. First operand 2939 states and 7497 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-03-01 18:17:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:15,760 INFO L93 Difference]: Finished difference Result 3723 states and 9138 transitions. [2022-03-01 18:17:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:17:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 28 [2022-03-01 18:17:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:15,765 INFO L225 Difference]: With dead ends: 3723 [2022-03-01 18:17:15,765 INFO L226 Difference]: Without dead ends: 3695 [2022-03-01 18:17:15,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 18:17:15,766 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 342 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:15,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-03-01 18:17:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3119. [2022-03-01 18:17:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 3118 states have (on average 2.5593329057087875) internal successors, (7980), 3118 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 7980 transitions. [2022-03-01 18:17:15,812 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 7980 transitions. Word has length 28 [2022-03-01 18:17:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:15,812 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 7980 transitions. [2022-03-01 18:17:15,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2022-03-01 18:17:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 7980 transitions. [2022-03-01 18:17:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:15,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:15,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:15,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 18:17:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:16,017 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash -114447712, now seen corresponding path program 70 times [2022-03-01 18:17:16,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:16,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391875380] [2022-03-01 18:17:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:16,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:16,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:16,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391875380] [2022-03-01 18:17:16,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391875380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:16,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962804655] [2022-03-01 18:17:16,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:16,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:16,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:16,341 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:17:16,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:16,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:17:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:16,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:16,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:16,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:17:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:17,327 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:17:17,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:17:17,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:17,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:17,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:17,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:17:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:17,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962804655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:17,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:17,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:17:17,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821857606] [2022-03-01 18:17:17,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:17,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:17,749 INFO L87 Difference]: Start difference. First operand 3119 states and 7980 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:17:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:19,780 INFO L93 Difference]: Finished difference Result 4166 states and 10459 transitions. [2022-03-01 18:17:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:17:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:17:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:19,786 INFO L225 Difference]: With dead ends: 4166 [2022-03-01 18:17:19,786 INFO L226 Difference]: Without dead ends: 4159 [2022-03-01 18:17:19,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=574, Invalid=4976, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:17:19,787 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:19,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 228 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 660 Invalid, 0 Unknown, 296 Unchecked, 0.4s Time] [2022-03-01 18:17:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-03-01 18:17:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3197. [2022-03-01 18:17:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 2.5528785982478097) internal successors, (8159), 3196 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 8159 transitions. [2022-03-01 18:17:19,829 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 8159 transitions. Word has length 30 [2022-03-01 18:17:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:19,829 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 8159 transitions. [2022-03-01 18:17:19,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:17:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 8159 transitions. [2022-03-01 18:17:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:19,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:19,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:19,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 18:17:20,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:20,033 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash 942240232, now seen corresponding path program 71 times [2022-03-01 18:17:20,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:20,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592154273] [2022-03-01 18:17:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:20,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:20,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:20,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592154273] [2022-03-01 18:17:20,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592154273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:20,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365157259] [2022-03-01 18:17:20,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:20,400 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:20,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:17:20,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:17:20,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:20,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:17:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:20,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:20,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:20,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:17:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:20,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:21,333 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:17:21,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:17:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:22,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:22,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:17:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:22,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365157259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:22,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:22,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:17:22,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194505902] [2022-03-01 18:17:22,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:22,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:22,056 INFO L87 Difference]: Start difference. First operand 3197 states and 8159 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:24,276 INFO L93 Difference]: Finished difference Result 4404 states and 11005 transitions. [2022-03-01 18:17:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:17:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:17:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:24,282 INFO L225 Difference]: With dead ends: 4404 [2022-03-01 18:17:24,282 INFO L226 Difference]: Without dead ends: 4401 [2022-03-01 18:17:24,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:17:24,283 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:24,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 210 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 599 Invalid, 0 Unknown, 417 Unchecked, 0.4s Time] [2022-03-01 18:17:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-03-01 18:17:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3295. [2022-03-01 18:17:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.546448087431694) internal successors, (8388), 3294 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 8388 transitions. [2022-03-01 18:17:24,346 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 8388 transitions. Word has length 30 [2022-03-01 18:17:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:24,346 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 8388 transitions. [2022-03-01 18:17:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 8388 transitions. [2022-03-01 18:17:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:24,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:24,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:24,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 18:17:24,571 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -631993436, now seen corresponding path program 72 times [2022-03-01 18:17:24,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:24,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98310916] [2022-03-01 18:17:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:24,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:24,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98310916] [2022-03-01 18:17:24,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98310916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:24,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886394928] [2022-03-01 18:17:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:24,899 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:17:24,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:17:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:24,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:17:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:25,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:25,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:17:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:25,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:25,828 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:17:25,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:17:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:26,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:26,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:17:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:26,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886394928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:26,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:26,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:17:26,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276801398] [2022-03-01 18:17:26,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:26,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:26,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:26,300 INFO L87 Difference]: Start difference. First operand 3295 states and 8388 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:28,222 INFO L93 Difference]: Finished difference Result 4374 states and 10904 transitions. [2022-03-01 18:17:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:17:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:17:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:28,228 INFO L225 Difference]: With dead ends: 4374 [2022-03-01 18:17:28,228 INFO L226 Difference]: Without dead ends: 4371 [2022-03-01 18:17:28,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=526, Invalid=4586, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:17:28,229 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:28,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 233 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 668 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2022-03-01 18:17:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-01 18:17:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3320. [2022-03-01 18:17:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5432359144320578) internal successors, (8441), 3319 states have internal predecessors, (8441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8441 transitions. [2022-03-01 18:17:28,276 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8441 transitions. Word has length 30 [2022-03-01 18:17:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:28,276 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8441 transitions. [2022-03-01 18:17:28,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8441 transitions. [2022-03-01 18:17:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:28,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:28,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:28,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 18:17:28,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:28,481 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:28,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1642060192, now seen corresponding path program 73 times [2022-03-01 18:17:28,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:28,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817045449] [2022-03-01 18:17:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:28,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:28,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:28,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817045449] [2022-03-01 18:17:28,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817045449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:28,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752049347] [2022-03-01 18:17:28,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:28,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:28,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:28,865 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:28,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:17:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:28,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:17:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:29,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:29,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:17:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:29,749 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:17:29,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:17:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:30,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:17:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:30,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752049347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:30,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:30,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:17:30,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947091306] [2022-03-01 18:17:30,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:30,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:30,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:30,315 INFO L87 Difference]: Start difference. First operand 3320 states and 8441 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:32,187 INFO L93 Difference]: Finished difference Result 4463 states and 11078 transitions. [2022-03-01 18:17:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:17:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:17:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:32,193 INFO L225 Difference]: With dead ends: 4463 [2022-03-01 18:17:32,193 INFO L226 Difference]: Without dead ends: 4460 [2022-03-01 18:17:32,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=536, Invalid=4576, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:17:32,194 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:32,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 224 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 611 Invalid, 0 Unknown, 502 Unchecked, 0.3s Time] [2022-03-01 18:17:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-01 18:17:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3376. [2022-03-01 18:17:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 2.5374814814814814) internal successors, (8564), 3375 states have internal predecessors, (8564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 8564 transitions. [2022-03-01 18:17:32,249 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 8564 transitions. Word has length 30 [2022-03-01 18:17:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:32,249 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 8564 transitions. [2022-03-01 18:17:32,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 8564 transitions. [2022-03-01 18:17:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:32,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:32,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:32,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 18:17:32,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:32,471 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1653603812, now seen corresponding path program 74 times [2022-03-01 18:17:32,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:32,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606785334] [2022-03-01 18:17:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:32,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:32,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606785334] [2022-03-01 18:17:32,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606785334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:32,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638722519] [2022-03-01 18:17:32,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:32,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:32,778 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:32,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:17:32,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:32,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:17:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:33,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:33,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:17:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:33,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:33,661 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:17:33,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:17:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:34,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:34,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:17:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:34,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638722519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:34,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:34,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:17:34,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328852130] [2022-03-01 18:17:34,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:34,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:34,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:34,253 INFO L87 Difference]: Start difference. First operand 3376 states and 8564 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:36,469 INFO L93 Difference]: Finished difference Result 4650 states and 11509 transitions. [2022-03-01 18:17:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:17:36,470 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:17:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:36,476 INFO L225 Difference]: With dead ends: 4650 [2022-03-01 18:17:36,476 INFO L226 Difference]: Without dead ends: 4647 [2022-03-01 18:17:36,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 18:17:36,477 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:36,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 224 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 639 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-03-01 18:17:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2022-03-01 18:17:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 3449. [2022-03-01 18:17:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 2.5336426914153134) internal successors, (8736), 3448 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 8736 transitions. [2022-03-01 18:17:36,534 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 8736 transitions. Word has length 30 [2022-03-01 18:17:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:36,534 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 8736 transitions. [2022-03-01 18:17:36,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 8736 transitions. [2022-03-01 18:17:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:17:36,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:36,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:36,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 18:17:36,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 18:17:36,738 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -822693660, now seen corresponding path program 75 times [2022-03-01 18:17:36,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:36,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271682642] [2022-03-01 18:17:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:36,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:37,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271682642] [2022-03-01 18:17:37,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271682642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:37,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625396164] [2022-03-01 18:17:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:37,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:37,094 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:37,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:17:37,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:17:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:37,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:17:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:38,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:38,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:17:38,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:38,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:38,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-01 18:17:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:40,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:17:40,544 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-01 18:17:40,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-01 18:18:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625396164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:14,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:14,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 18:18:14,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105239560] [2022-03-01 18:18:14,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:14,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:18:14,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:18:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:18:14,306 INFO L87 Difference]: Start difference. First operand 3449 states and 8736 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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) [2022-03-01 18:18:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:16,551 INFO L93 Difference]: Finished difference Result 4822 states and 11870 transitions. [2022-03-01 18:18:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:18:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 30 [2022-03-01 18:18:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:16,557 INFO L225 Difference]: With dead ends: 4822 [2022-03-01 18:18:16,557 INFO L226 Difference]: Without dead ends: 4808 [2022-03-01 18:18:16,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=689, Invalid=5631, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 18:18:16,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:16,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 248 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 330 Invalid, 0 Unknown, 1203 Unchecked, 0.2s Time] [2022-03-01 18:18:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2022-03-01 18:18:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 3627. [2022-03-01 18:18:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.532542746828461) internal successors, (9183), 3626 states have internal predecessors, (9183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9183 transitions. [2022-03-01 18:18:16,605 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9183 transitions. Word has length 30 [2022-03-01 18:18:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:16,606 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 9183 transitions. [2022-03-01 18:18:16,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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) [2022-03-01 18:18:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9183 transitions. [2022-03-01 18:18:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:16,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:16,609 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:16,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 18:18:16,810 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1881646240, now seen corresponding path program 76 times [2022-03-01 18:18:16,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:16,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644787805] [2022-03-01 18:18:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:17,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:17,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644787805] [2022-03-01 18:18:17,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644787805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:17,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946354939] [2022-03-01 18:18:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:17,132 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:17,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:18:17,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:17,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:18:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:17,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:17,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:17,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:18:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:18,026 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:18:18,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:18:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:18,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:18,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:18:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946354939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:18,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:18,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:18:18,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434572904] [2022-03-01 18:18:18,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:18,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:18,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:18,616 INFO L87 Difference]: Start difference. First operand 3627 states and 9183 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:20,769 INFO L93 Difference]: Finished difference Result 5062 states and 12550 transitions. [2022-03-01 18:18:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:18:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:18:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:20,775 INFO L225 Difference]: With dead ends: 5062 [2022-03-01 18:18:20,775 INFO L226 Difference]: Without dead ends: 5055 [2022-03-01 18:18:20,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=640, Invalid=4910, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:18:20,776 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 184 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 662 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-03-01 18:18:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2022-03-01 18:18:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3754. [2022-03-01 18:18:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 2.5329070077271516) internal successors, (9506), 3753 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 9506 transitions. [2022-03-01 18:18:20,819 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 9506 transitions. Word has length 30 [2022-03-01 18:18:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 9506 transitions. [2022-03-01 18:18:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 9506 transitions. [2022-03-01 18:18:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:20,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:20,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:20,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 18:18:21,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:21,023 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1784027364, now seen corresponding path program 77 times [2022-03-01 18:18:21,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:21,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368298098] [2022-03-01 18:18:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:21,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:21,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368298098] [2022-03-01 18:18:21,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368298098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:21,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201677120] [2022-03-01 18:18:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:21,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:21,355 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:21,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:18:21,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:18:21,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:21,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:18:21,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:21,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:21,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:18:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:22,230 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:18:22,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:18:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:22,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:18:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:22,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201677120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:22,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:22,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:18:22,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505972084] [2022-03-01 18:18:22,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:22,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:22,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:22,599 INFO L87 Difference]: Start difference. First operand 3754 states and 9506 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:24,748 INFO L93 Difference]: Finished difference Result 4972 states and 12378 transitions. [2022-03-01 18:18:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:18:24,748 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:18:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:24,754 INFO L225 Difference]: With dead ends: 4972 [2022-03-01 18:18:24,754 INFO L226 Difference]: Without dead ends: 4965 [2022-03-01 18:18:24,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=633, Invalid=4769, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:18:24,755 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:24,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 161 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 772 Invalid, 0 Unknown, 455 Unchecked, 0.4s Time] [2022-03-01 18:18:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-03-01 18:18:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3846. [2022-03-01 18:18:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.5362808842652798) internal successors, (9752), 3845 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 9752 transitions. [2022-03-01 18:18:24,825 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 9752 transitions. Word has length 30 [2022-03-01 18:18:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 9752 transitions. [2022-03-01 18:18:24,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 9752 transitions. [2022-03-01 18:18:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:24,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:24,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:24,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:25,047 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1502641948, now seen corresponding path program 78 times [2022-03-01 18:18:25,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:25,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965034393] [2022-03-01 18:18:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:25,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965034393] [2022-03-01 18:18:25,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965034393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:25,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161029036] [2022-03-01 18:18:25,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:25,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:25,416 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:25,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 18:18:25,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:18:25,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:25,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:18:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:25,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:18:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:26,376 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:18:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:18:26,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:26,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:18:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161029036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:26,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:26,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:18:26,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142452322] [2022-03-01 18:18:26,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:26,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:26,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:26,971 INFO L87 Difference]: Start difference. First operand 3846 states and 9752 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:29,106 INFO L93 Difference]: Finished difference Result 5284 states and 13165 transitions. [2022-03-01 18:18:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:18:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:18:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:29,113 INFO L225 Difference]: With dead ends: 5284 [2022-03-01 18:18:29,113 INFO L226 Difference]: Without dead ends: 5277 [2022-03-01 18:18:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=614, Invalid=4642, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:18:29,113 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:29,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 199 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 802 Invalid, 0 Unknown, 510 Unchecked, 0.4s Time] [2022-03-01 18:18:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-01 18:18:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 4055. [2022-03-01 18:18:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4055 states, 4054 states have (on average 2.5444005920078934) internal successors, (10315), 4054 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 10315 transitions. [2022-03-01 18:18:29,161 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 10315 transitions. Word has length 30 [2022-03-01 18:18:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 10315 transitions. [2022-03-01 18:18:29,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 10315 transitions. [2022-03-01 18:18:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:29,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:29,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:29,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-01 18:18:29,366 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1774381284, now seen corresponding path program 79 times [2022-03-01 18:18:29,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:29,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934640698] [2022-03-01 18:18:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:29,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934640698] [2022-03-01 18:18:29,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934640698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:29,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703212806] [2022-03-01 18:18:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:29,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:29,690 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:29,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 18:18:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:29,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:18:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:30,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:18:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:30,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:30,636 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:18:30,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:18:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:31,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:18:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:31,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703212806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:31,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:31,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:18:31,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408778472] [2022-03-01 18:18:31,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:31,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:31,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:31,166 INFO L87 Difference]: Start difference. First operand 4055 states and 10315 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2022-03-01 18:18:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:32,916 INFO L93 Difference]: Finished difference Result 5287 states and 13244 transitions. [2022-03-01 18:18:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:18:32,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 30 [2022-03-01 18:18:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:32,924 INFO L225 Difference]: With dead ends: 5287 [2022-03-01 18:18:32,924 INFO L226 Difference]: Without dead ends: 5280 [2022-03-01 18:18:32,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=509, Invalid=4047, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:18:32,925 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:32,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 118 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 490 Invalid, 0 Unknown, 283 Unchecked, 0.3s Time] [2022-03-01 18:18:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-03-01 18:18:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4097. [2022-03-01 18:18:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 2.5498046875) internal successors, (10444), 4096 states have internal predecessors, (10444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 10444 transitions. [2022-03-01 18:18:32,977 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 10444 transitions. Word has length 30 [2022-03-01 18:18:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:32,977 INFO L470 AbstractCegarLoop]: Abstraction has 4097 states and 10444 transitions. [2022-03-01 18:18:32,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2022-03-01 18:18:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 10444 transitions. [2022-03-01 18:18:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:32,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:32,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:32,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 18:18:33,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:33,182 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash -550984530, now seen corresponding path program 80 times [2022-03-01 18:18:33,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:33,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585337944] [2022-03-01 18:18:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:33,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585337944] [2022-03-01 18:18:33,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585337944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:33,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500035959] [2022-03-01 18:18:33,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:33,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:33,554 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:33,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 18:18:33,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:33,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:18:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:33,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:33,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:33,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:18:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:34,428 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:18:34,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:18:34,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:34,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:18:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:34,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500035959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:34,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:34,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:18:34,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701434918] [2022-03-01 18:18:34,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:34,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:18:34,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:18:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:34,887 INFO L87 Difference]: Start difference. First operand 4097 states and 10444 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:37,352 INFO L93 Difference]: Finished difference Result 5489 states and 13623 transitions. [2022-03-01 18:18:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:18:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:18:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:37,359 INFO L225 Difference]: With dead ends: 5489 [2022-03-01 18:18:37,359 INFO L226 Difference]: Without dead ends: 5400 [2022-03-01 18:18:37,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=685, Invalid=5321, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:18:37,359 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 374 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1062 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2022-03-01 18:18:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-03-01 18:18:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4287. [2022-03-01 18:18:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 2.536164255716286) internal successors, (10870), 4286 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 10870 transitions. [2022-03-01 18:18:37,408 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 10870 transitions. Word has length 30 [2022-03-01 18:18:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:37,408 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 10870 transitions. [2022-03-01 18:18:37,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:18:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 10870 transitions. [2022-03-01 18:18:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:18:37,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:37,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:37,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 18:18:37,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:37,613 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1068530254, now seen corresponding path program 81 times [2022-03-01 18:18:37,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:37,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960263837] [2022-03-01 18:18:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:37,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960263837] [2022-03-01 18:18:37,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960263837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:37,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953679320] [2022-03-01 18:18:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:37,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:37,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:37,913 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:37,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 18:18:37,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:18:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:37,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:18:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:38,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:18:38,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:38,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-01 18:18:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:39,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:40,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:40,835 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-01 18:18:40,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-01 18:19:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953679320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:13,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:13,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 18:19:13,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275120920] [2022-03-01 18:19:13,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:13,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:19:13,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:19:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:19:13,265 INFO L87 Difference]: Start difference. First operand 4287 states and 10870 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:19:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:15,337 INFO L93 Difference]: Finished difference Result 5896 states and 14560 transitions. [2022-03-01 18:19:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:19:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-01 18:19:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:15,344 INFO L225 Difference]: With dead ends: 5896 [2022-03-01 18:19:15,344 INFO L226 Difference]: Without dead ends: 5880 [2022-03-01 18:19:15,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=566, Invalid=4690, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:19:15,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:15,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 168 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 314 Invalid, 0 Unknown, 485 Unchecked, 0.2s Time] [2022-03-01 18:19:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2022-03-01 18:19:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4291. [2022-03-01 18:19:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 2.5356643356643356) internal successors, (10878), 4290 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10878 transitions. [2022-03-01 18:19:15,402 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10878 transitions. Word has length 30 [2022-03-01 18:19:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:15,402 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 10878 transitions. [2022-03-01 18:19:15,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:19:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10878 transitions. [2022-03-01 18:19:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:15,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:15,407 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:15,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:15,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-01 18:19:15,607 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2127482834, now seen corresponding path program 82 times [2022-03-01 18:19:15,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:15,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384915339] [2022-03-01 18:19:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:15,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:15,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384915339] [2022-03-01 18:19:15,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384915339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:15,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261734916] [2022-03-01 18:19:15,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:15,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:15,920 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:15,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 18:19:15,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:15,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:15,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:19:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:16,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:19:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:16,828 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:19:16,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:19:17,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:17,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:17,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:19:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:17,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261734916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:17,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:17,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:19:17,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374515150] [2022-03-01 18:19:17,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:17,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:17,220 INFO L87 Difference]: Start difference. First operand 4291 states and 10878 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:19,953 INFO L93 Difference]: Finished difference Result 5552 states and 13751 transitions. [2022-03-01 18:19:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:19:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:19,961 INFO L225 Difference]: With dead ends: 5552 [2022-03-01 18:19:19,961 INFO L226 Difference]: Without dead ends: 5453 [2022-03-01 18:19:19,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:19:19,962 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:19,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 378 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1213 Invalid, 0 Unknown, 550 Unchecked, 0.6s Time] [2022-03-01 18:19:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-03-01 18:19:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4263. [2022-03-01 18:19:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.538479587048334) internal successors, (10819), 4262 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 10819 transitions. [2022-03-01 18:19:20,021 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 10819 transitions. Word has length 30 [2022-03-01 18:19:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:20,021 INFO L470 AbstractCegarLoop]: Abstraction has 4263 states and 10819 transitions. [2022-03-01 18:19:20,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 10819 transitions. [2022-03-01 18:19:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:20,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:20,027 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:20,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:20,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:20,241 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 938367594, now seen corresponding path program 83 times [2022-03-01 18:19:20,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:20,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287174134] [2022-03-01 18:19:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:20,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287174134] [2022-03-01 18:19:20,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287174134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:20,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357688483] [2022-03-01 18:19:20,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:20,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:20,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:20,570 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:20,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 18:19:20,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:19:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:20,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:19:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:19:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:21,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:21,489 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:19:21,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:19:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:19:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:21,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357688483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:21,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:21,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:19:21,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276780839] [2022-03-01 18:19:21,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:21,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:21,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:21,984 INFO L87 Difference]: Start difference. First operand 4263 states and 10819 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:19:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:24,619 INFO L93 Difference]: Finished difference Result 5582 states and 13851 transitions. [2022-03-01 18:19:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:19:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:19:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:24,628 INFO L225 Difference]: With dead ends: 5582 [2022-03-01 18:19:24,628 INFO L226 Difference]: Without dead ends: 5513 [2022-03-01 18:19:24,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:19:24,629 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 301 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1168 Invalid, 0 Unknown, 314 Unchecked, 0.6s Time] [2022-03-01 18:19:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2022-03-01 18:19:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 4407. [2022-03-01 18:19:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.5304130730821606) internal successors, (11149), 4406 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11149 transitions. [2022-03-01 18:19:24,684 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11149 transitions. Word has length 30 [2022-03-01 18:19:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:24,684 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 11149 transitions. [2022-03-01 18:19:24,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:19:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11149 transitions. [2022-03-01 18:19:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:24,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:24,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:24,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 18:19:24,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:24,889 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 420821870, now seen corresponding path program 84 times [2022-03-01 18:19:24,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:24,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980075422] [2022-03-01 18:19:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:25,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:25,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980075422] [2022-03-01 18:19:25,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980075422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:25,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588768954] [2022-03-01 18:19:25,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:25,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:25,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:25,228 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:25,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 18:19:25,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:19:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:25,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:19:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:25,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:25,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:25,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:19:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:25,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:26,133 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:19:26,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:19:26,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:26,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:26,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:19:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:26,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588768954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:26,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:26,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:19:26,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408891834] [2022-03-01 18:19:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:26,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:26,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:26,546 INFO L87 Difference]: Start difference. First operand 4407 states and 11149 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:29,070 INFO L93 Difference]: Finished difference Result 5498 states and 13608 transitions. [2022-03-01 18:19:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:19:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:29,077 INFO L225 Difference]: With dead ends: 5498 [2022-03-01 18:19:29,077 INFO L226 Difference]: Without dead ends: 5475 [2022-03-01 18:19:29,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=727, Invalid=4823, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:19:29,077 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 199 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:29,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 195 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1171 Invalid, 0 Unknown, 281 Unchecked, 0.6s Time] [2022-03-01 18:19:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-03-01 18:19:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 4391. [2022-03-01 18:19:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 2.5300683371298405) internal successors, (11107), 4390 states have internal predecessors, (11107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 11107 transitions. [2022-03-01 18:19:29,126 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 11107 transitions. Word has length 30 [2022-03-01 18:19:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:29,126 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 11107 transitions. [2022-03-01 18:19:29,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 11107 transitions. [2022-03-01 18:19:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:29,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:29,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:29,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:29,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 18:19:29,354 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1854127390, now seen corresponding path program 85 times [2022-03-01 18:19:29,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:29,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501392818] [2022-03-01 18:19:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:29,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:29,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501392818] [2022-03-01 18:19:29,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501392818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:29,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199653166] [2022-03-01 18:19:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:29,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:29,705 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:29,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 18:19:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:29,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:19:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:30,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:19:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:30,566 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:19:30,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:19:31,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:31,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:31,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:31,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:19:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:31,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199653166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:31,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:31,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:19:31,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345624803] [2022-03-01 18:19:31,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:31,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:31,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:31,218 INFO L87 Difference]: Start difference. First operand 4391 states and 11107 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2022-03-01 18:19:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:34,381 INFO L93 Difference]: Finished difference Result 5992 states and 14766 transitions. [2022-03-01 18:19:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:19:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 30 [2022-03-01 18:19:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:34,389 INFO L225 Difference]: With dead ends: 5992 [2022-03-01 18:19:34,389 INFO L226 Difference]: Without dead ends: 5976 [2022-03-01 18:19:34,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=829, Invalid=6481, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 18:19:34,390 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:34,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 302 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:19:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-03-01 18:19:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4474. [2022-03-01 18:19:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.5309635591325734) internal successors, (11321), 4473 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 11321 transitions. [2022-03-01 18:19:34,442 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 11321 transitions. Word has length 30 [2022-03-01 18:19:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:34,442 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 11321 transitions. [2022-03-01 18:19:34,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2022-03-01 18:19:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 11321 transitions. [2022-03-01 18:19:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:34,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:34,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:34,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:34,647 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1499462230, now seen corresponding path program 86 times [2022-03-01 18:19:34,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:34,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920270736] [2022-03-01 18:19:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:34,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:34,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920270736] [2022-03-01 18:19:34,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920270736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939420979] [2022-03-01 18:19:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:34,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:34,996 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:35,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 18:19:35,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:35,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:19:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:35,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:35,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:19:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:35,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:35,870 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:19:35,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:19:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:36,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:19:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:36,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939420979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:36,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:36,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:19:36,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627529061] [2022-03-01 18:19:36,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:36,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:19:36,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:19:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:19:36,265 INFO L87 Difference]: Start difference. First operand 4474 states and 11321 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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) [2022-03-01 18:19:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:38,724 INFO L93 Difference]: Finished difference Result 6009 states and 14790 transitions. [2022-03-01 18:19:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:19:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 30 [2022-03-01 18:19:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:38,733 INFO L225 Difference]: With dead ends: 6009 [2022-03-01 18:19:38,733 INFO L226 Difference]: Without dead ends: 5943 [2022-03-01 18:19:38,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=761, Invalid=4641, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:19:38,734 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:38,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 233 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 966 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2022-03-01 18:19:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2022-03-01 18:19:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 4546. [2022-03-01 18:19:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.5256325632563255) internal successors, (11479), 4545 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11479 transitions. [2022-03-01 18:19:38,794 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11479 transitions. Word has length 30 [2022-03-01 18:19:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:38,795 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 11479 transitions. [2022-03-01 18:19:38,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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) [2022-03-01 18:19:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11479 transitions. [2022-03-01 18:19:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:38,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:38,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:38,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 18:19:38,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:39,000 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:39,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2043738198, now seen corresponding path program 87 times [2022-03-01 18:19:39,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:39,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406526795] [2022-03-01 18:19:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:39,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:39,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406526795] [2022-03-01 18:19:39,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406526795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:39,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595567268] [2022-03-01 18:19:39,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:39,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:39,249 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:39,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 18:19:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:19:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:39,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:19:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:39,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:39,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 77 treesize of output 119 [2022-03-01 18:19:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:40,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:40,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:40,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-01 18:19:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:52,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595567268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:52,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:52,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-01 18:19:52,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448499601] [2022-03-01 18:19:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:52,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:52,755 INFO L87 Difference]: Start difference. First operand 4546 states and 11479 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:20:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:01,423 INFO L93 Difference]: Finished difference Result 6617 states and 15855 transitions. [2022-03-01 18:20:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-01 18:20:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-01 18:20:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:01,432 INFO L225 Difference]: With dead ends: 6617 [2022-03-01 18:20:01,432 INFO L226 Difference]: Without dead ends: 6583 [2022-03-01 18:20:01,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6498 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2782, Invalid=16678, Unknown=0, NotChecked=0, Total=19460 [2022-03-01 18:20:01,434 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 574 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:01,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 502 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1378 Invalid, 0 Unknown, 872 Unchecked, 0.9s Time] [2022-03-01 18:20:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-03-01 18:20:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 4542. [2022-03-01 18:20:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 2.522131689055274) internal successors, (11453), 4541 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11453 transitions. [2022-03-01 18:20:01,525 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11453 transitions. Word has length 30 [2022-03-01 18:20:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:01,525 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 11453 transitions. [2022-03-01 18:20:01,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:20:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11453 transitions. [2022-03-01 18:20:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:01,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:01,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:01,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 18:20:01,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:01,730 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -761180122, now seen corresponding path program 88 times [2022-03-01 18:20:01,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:01,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608994085] [2022-03-01 18:20:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:01,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:01,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608994085] [2022-03-01 18:20:01,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608994085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:01,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998979323] [2022-03-01 18:20:01,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:01,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:01,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:01,975 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:01,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 18:20:01,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:02,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:20:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:02,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:20:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:02,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:02,802 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:20:02,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-01 18:20:03,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:03,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:20:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:03,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998979323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:03,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:03,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-01 18:20:03,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112404966] [2022-03-01 18:20:03,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:03,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:20:03,418 INFO L87 Difference]: Start difference. First operand 4542 states and 11453 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-01 18:20:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:05,672 INFO L93 Difference]: Finished difference Result 5404 states and 13338 transitions. [2022-03-01 18:20:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:20:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 30 [2022-03-01 18:20:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:05,680 INFO L225 Difference]: With dead ends: 5404 [2022-03-01 18:20:05,681 INFO L226 Difference]: Without dead ends: 5348 [2022-03-01 18:20:05,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=732, Invalid=4670, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:20:05,681 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 278 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:05,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 408 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1221 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-03-01 18:20:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-01 18:20:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4711. [2022-03-01 18:20:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 2.5067940552016985) internal successors, (11807), 4710 states have internal predecessors, (11807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 11807 transitions. [2022-03-01 18:20:05,761 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 11807 transitions. Word has length 30 [2022-03-01 18:20:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:05,761 INFO L470 AbstractCegarLoop]: Abstraction has 4711 states and 11807 transitions. [2022-03-01 18:20:05,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-01 18:20:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 11807 transitions. [2022-03-01 18:20:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:05,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:05,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:05,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:05,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-01 18:20:05,967 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash 295507822, now seen corresponding path program 89 times [2022-03-01 18:20:05,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:05,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539166071] [2022-03-01 18:20:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:06,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:06,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539166071] [2022-03-01 18:20:06,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539166071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:06,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266514437] [2022-03-01 18:20:06,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:06,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:06,240 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:06,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 18:20:06,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:20:06,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:06,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:20:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:06,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:06,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:06,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:20:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:06,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:07,081 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:20:07,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-01 18:20:07,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:07,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:20:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:07,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266514437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:07,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:07,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-01 18:20:07,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815534142] [2022-03-01 18:20:07,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:07,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:07,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:20:07,503 INFO L87 Difference]: Start difference. First operand 4711 states and 11807 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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) [2022-03-01 18:20:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:09,489 INFO L93 Difference]: Finished difference Result 5352 states and 13141 transitions. [2022-03-01 18:20:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:20:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-03-01 18:20:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:09,498 INFO L225 Difference]: With dead ends: 5352 [2022-03-01 18:20:09,498 INFO L226 Difference]: Without dead ends: 5345 [2022-03-01 18:20:09,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=642, Invalid=3914, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:20:09,499 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 241 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:09,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1154 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-03-01 18:20:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-03-01 18:20:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4709. [2022-03-01 18:20:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 2.5072217502124046) internal successors, (11804), 4708 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 11804 transitions. [2022-03-01 18:20:09,570 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 11804 transitions. Word has length 30 [2022-03-01 18:20:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:09,571 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 11804 transitions. [2022-03-01 18:20:09,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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) [2022-03-01 18:20:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 11804 transitions. [2022-03-01 18:20:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:09,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:09,576 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:09,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 18:20:09,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:09,776 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 181205862, now seen corresponding path program 90 times [2022-03-01 18:20:09,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:09,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391305130] [2022-03-01 18:20:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:10,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:10,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391305130] [2022-03-01 18:20:10,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391305130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:10,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407031604] [2022-03-01 18:20:10,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:10,119 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:10,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 18:20:10,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 18:20:10,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:10,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:20:10,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:10,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:10,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-01 18:20:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:10,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:12,751 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-01 18:20:12,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-01 18:20:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:58,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407031604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:58,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:58,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-01 18:20:58,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25365675] [2022-03-01 18:20:58,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:58,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:20:58,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:20:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:20:58,659 INFO L87 Difference]: Start difference. First operand 4709 states and 11804 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:21:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:06,965 INFO L93 Difference]: Finished difference Result 9227 states and 22664 transitions. [2022-03-01 18:21:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 18:21:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-01 18:21:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:06,976 INFO L225 Difference]: With dead ends: 9227 [2022-03-01 18:21:06,976 INFO L226 Difference]: Without dead ends: 9183 [2022-03-01 18:21:06,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7482 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2589, Invalid=15771, Unknown=0, NotChecked=0, Total=18360 [2022-03-01 18:21:06,977 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 400 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1804 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:06,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 352 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 922 Invalid, 0 Unknown, 1804 Unchecked, 0.5s Time] [2022-03-01 18:21:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2022-03-01 18:21:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 6044. [2022-03-01 18:21:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6044 states, 6043 states have (on average 2.513983120966407) internal successors, (15192), 6043 states have internal predecessors, (15192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 15192 transitions. [2022-03-01 18:21:07,059 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 15192 transitions. Word has length 30 [2022-03-01 18:21:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:07,059 INFO L470 AbstractCegarLoop]: Abstraction has 6044 states and 15192 transitions. [2022-03-01 18:21:07,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:21:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 15192 transitions. [2022-03-01 18:21:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:07,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:07,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:07,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 18:21:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:07,265 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1549563870, now seen corresponding path program 91 times [2022-03-01 18:21:07,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:07,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309801645] [2022-03-01 18:21:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:07,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:07,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:07,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309801645] [2022-03-01 18:21:07,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309801645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:07,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622149829] [2022-03-01 18:21:07,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:07,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:07,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:07,557 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:07,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 18:21:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:07,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:21:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:07,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:21:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:07,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:08,369 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:21:08,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:21:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:08,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:21:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:08,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622149829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:08,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:08,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:21:08,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293739141] [2022-03-01 18:21:08,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:08,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:21:08,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:21:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:08,971 INFO L87 Difference]: Start difference. First operand 6044 states and 15192 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:12,019 INFO L93 Difference]: Finished difference Result 7098 states and 17655 transitions. [2022-03-01 18:21:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:21:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:12,028 INFO L225 Difference]: With dead ends: 7098 [2022-03-01 18:21:12,029 INFO L226 Difference]: Without dead ends: 7052 [2022-03-01 18:21:12,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=931, Invalid=6209, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:21:12,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 277 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:12,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 340 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:21:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2022-03-01 18:21:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 5783. [2022-03-01 18:21:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 2.5051885160844) internal successors, (14485), 5782 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 14485 transitions. [2022-03-01 18:21:12,127 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 14485 transitions. Word has length 30 [2022-03-01 18:21:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:12,127 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 14485 transitions. [2022-03-01 18:21:12,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 14485 transitions. [2022-03-01 18:21:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:12,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:12,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:12,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:12,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:12,333 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash 846912614, now seen corresponding path program 92 times [2022-03-01 18:21:12,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:12,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217029324] [2022-03-01 18:21:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:12,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:12,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:12,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217029324] [2022-03-01 18:21:12,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217029324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:12,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042649915] [2022-03-01 18:21:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:12,648 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:12,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 18:21:12,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:12,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:12,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:21:12,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:21:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:13,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:13,535 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:21:13,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:21:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:13,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:21:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:13,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042649915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:13,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:13,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:21:13,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094679375] [2022-03-01 18:21:13,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:13,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:21:13,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:21:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:13,937 INFO L87 Difference]: Start difference. First operand 5783 states and 14485 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:16,914 INFO L93 Difference]: Finished difference Result 7282 states and 18026 transitions. [2022-03-01 18:21:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:21:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:16,924 INFO L225 Difference]: With dead ends: 7282 [2022-03-01 18:21:16,924 INFO L226 Difference]: Without dead ends: 7252 [2022-03-01 18:21:16,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=806, Invalid=5674, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:21:16,925 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 246 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:16,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:21:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-03-01 18:21:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 5867. [2022-03-01 18:21:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5866 states have (on average 2.5124445959768154) internal successors, (14738), 5866 states have internal predecessors, (14738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 14738 transitions. [2022-03-01 18:21:17,000 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 14738 transitions. Word has length 30 [2022-03-01 18:21:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 14738 transitions. [2022-03-01 18:21:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 14738 transitions. [2022-03-01 18:21:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:17,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:17,005 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:17,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 18:21:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:17,206 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash 968145010, now seen corresponding path program 93 times [2022-03-01 18:21:17,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:17,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309465671] [2022-03-01 18:21:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:17,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:17,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309465671] [2022-03-01 18:21:17,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309465671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:17,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930991955] [2022-03-01 18:21:17,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:17,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:17,515 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:17,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 18:21:17,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:21:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:17,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:21:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:18,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:18,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:18,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-01 18:21:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:20,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:20,577 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-01 18:21:20,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-01 18:21:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:53,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930991955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:53,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:53,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 18:21:53,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470507391] [2022-03-01 18:21:53,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:53,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:21:53,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:21:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:21:53,229 INFO L87 Difference]: Start difference. First operand 5867 states and 14738 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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) [2022-03-01 18:21:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:56,148 INFO L93 Difference]: Finished difference Result 8982 states and 21661 transitions. [2022-03-01 18:21:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:21:56,148 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 30 [2022-03-01 18:21:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:56,159 INFO L225 Difference]: With dead ends: 8982 [2022-03-01 18:21:56,159 INFO L226 Difference]: Without dead ends: 8935 [2022-03-01 18:21:56,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=581, Invalid=4249, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:21:56,160 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 178 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:56,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 272 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 591 Invalid, 0 Unknown, 660 Unchecked, 0.3s Time] [2022-03-01 18:21:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-03-01 18:21:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5939. [2022-03-01 18:21:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 2.506567867969013) internal successors, (14884), 5938 states have internal predecessors, (14884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 14884 transitions. [2022-03-01 18:21:56,238 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 14884 transitions. Word has length 30 [2022-03-01 18:21:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:56,238 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 14884 transitions. [2022-03-01 18:21:56,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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) [2022-03-01 18:21:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 14884 transitions. [2022-03-01 18:21:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:56,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:56,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:56,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 18:21:56,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-01 18:21:56,444 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1672644370, now seen corresponding path program 94 times [2022-03-01 18:21:56,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:56,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803821741] [2022-03-01 18:21:56,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:56,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:56,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:56,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803821741] [2022-03-01 18:21:56,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803821741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:56,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539956043] [2022-03-01 18:21:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:56,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:56,723 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:56,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 18:21:56,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:56,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:21:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:21:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:57,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:57,546 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:21:57,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:21:57,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:57,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:21:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:57,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539956043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:57,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:57,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:21:57,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804271154] [2022-03-01 18:21:57,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:57,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:21:57,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:21:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:21:57,920 INFO L87 Difference]: Start difference. First operand 5939 states and 14884 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:22:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:00,008 INFO L93 Difference]: Finished difference Result 7445 states and 18245 transitions. [2022-03-01 18:22:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:22:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:22:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:00,020 INFO L225 Difference]: With dead ends: 7445 [2022-03-01 18:22:00,020 INFO L226 Difference]: Without dead ends: 7397 [2022-03-01 18:22:00,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=778, Invalid=4772, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:22:00,021 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:00,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 167 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-03-01 18:22:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-03-01 18:22:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 5905. [2022-03-01 18:22:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5905 states, 5904 states have (on average 2.504742547425474) internal successors, (14788), 5904 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 14788 transitions. [2022-03-01 18:22:00,094 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 14788 transitions. Word has length 30 [2022-03-01 18:22:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:00,094 INFO L470 AbstractCegarLoop]: Abstraction has 5905 states and 14788 transitions. [2022-03-01 18:22:00,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:22:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 14788 transitions. [2022-03-01 18:22:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:00,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:00,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:00,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 18:22:00,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 18:22:00,300 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:22:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -298602706, now seen corresponding path program 95 times [2022-03-01 18:22:00,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:00,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058205627] [2022-03-01 18:22:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:00,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:00,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058205627] [2022-03-01 18:22:00,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058205627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:00,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361854496] [2022-03-01 18:22:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:22:00,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:00,571 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:00,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 18:22:00,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:22:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:00,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:22:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:00,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:22:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:01,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:01,402 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:22:01,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-01 18:22:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:01,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:22:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:01,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361854496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:01,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:01,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 18:22:01,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587138021] [2022-03-01 18:22:01,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:22:01,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:22:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:22:01,937 INFO L87 Difference]: Start difference. First operand 5905 states and 14788 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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) [2022-03-01 18:22:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:03,725 INFO L93 Difference]: Finished difference Result 6938 states and 17086 transitions. [2022-03-01 18:22:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:22:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 30 [2022-03-01 18:22:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:03,735 INFO L225 Difference]: With dead ends: 6938 [2022-03-01 18:22:03,735 INFO L226 Difference]: Without dead ends: 6880 [2022-03-01 18:22:03,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:22:03,735 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:03,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 345 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1443 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-03-01 18:22:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-03-01 18:22:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6284. [2022-03-01 18:22:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 6283 states have (on average 2.5102657965939836) internal successors, (15772), 6283 states have internal predecessors, (15772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 15772 transitions. [2022-03-01 18:22:03,830 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 15772 transitions. Word has length 30 [2022-03-01 18:22:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 6284 states and 15772 transitions. [2022-03-01 18:22:03,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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) [2022-03-01 18:22:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 15772 transitions. [2022-03-01 18:22:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:03,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:03,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:03,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 18:22:04,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 18:22:04,036 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:22:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1926341354, now seen corresponding path program 96 times [2022-03-01 18:22:04,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:04,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472307788] [2022-03-01 18:22:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:04,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:04,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472307788] [2022-03-01 18:22:04,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472307788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:04,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088163503] [2022-03-01 18:22:04,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:22:04,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:04,319 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:04,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 18:22:04,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 18:22:04,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:04,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:22:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:04,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-01 18:22:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:05,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:07,158 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-01 18:22:07,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-01 18:23:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:16,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088163503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:16,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:16,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 18:23:16,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099914064] [2022-03-01 18:23:16,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:16,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:23:16,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:23:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:23:16,451 INFO L87 Difference]: Start difference. First operand 6284 states and 15772 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:23:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:23,373 INFO L93 Difference]: Finished difference Result 10837 states and 26549 transitions. [2022-03-01 18:23:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:23:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-01 18:23:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:23,387 INFO L225 Difference]: With dead ends: 10837 [2022-03-01 18:23:23,388 INFO L226 Difference]: Without dead ends: 10791 [2022-03-01 18:23:23,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 36 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1554, Invalid=10218, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:23:23,389 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 215 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:23,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 298 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 735 Invalid, 0 Unknown, 1178 Unchecked, 0.4s Time] [2022-03-01 18:23:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2022-03-01 18:23:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 6996. [2022-03-01 18:23:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.5122230164403145) internal successors, (17573), 6995 states have internal predecessors, (17573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 17573 transitions. [2022-03-01 18:23:23,491 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 17573 transitions. Word has length 30 [2022-03-01 18:23:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:23,491 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 17573 transitions. [2022-03-01 18:23:23,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:23:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 17573 transitions. [2022-03-01 18:23:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:23,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:23,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:23,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 18:23:23,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:23,699 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:23:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 871858922, now seen corresponding path program 97 times [2022-03-01 18:23:23,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:23,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604956973] [2022-03-01 18:23:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:23,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:23,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604956973] [2022-03-01 18:23:23,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604956973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:23,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721642681] [2022-03-01 18:23:23,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:23,986 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:23,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 18:23:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:24,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:23:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:24,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:23:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:24,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:24,861 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:23:24,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:23:25,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:25,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:23:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721642681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:25,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:25,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:23:25,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104669939] [2022-03-01 18:23:25,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:25,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:23:25,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:23:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:23:25,336 INFO L87 Difference]: Start difference. First operand 6996 states and 17573 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-01 18:23:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:29,169 INFO L93 Difference]: Finished difference Result 10236 states and 25134 transitions. [2022-03-01 18:23:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:23:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-03-01 18:23:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:29,184 INFO L225 Difference]: With dead ends: 10236 [2022-03-01 18:23:29,184 INFO L226 Difference]: Without dead ends: 10148 [2022-03-01 18:23:29,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1148, Invalid=7972, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:23:29,185 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 354 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:29,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 364 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:23:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-03-01 18:23:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 6838. [2022-03-01 18:23:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.5066549656281993) internal successors, (17138), 6837 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 17138 transitions. [2022-03-01 18:23:29,292 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 17138 transitions. Word has length 30 [2022-03-01 18:23:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:29,292 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 17138 transitions. [2022-03-01 18:23:29,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-01 18:23:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 17138 transitions. [2022-03-01 18:23:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:29,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:29,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:29,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-01 18:23:29,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 18:23:29,500 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:23:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1702919190, now seen corresponding path program 98 times [2022-03-01 18:23:29,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:29,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918636783] [2022-03-01 18:23:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:29,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:23:29,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:29,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918636783] [2022-03-01 18:23:29,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918636783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:29,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436314771] [2022-03-01 18:23:29,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:23:29,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:29,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:29,791 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:29,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 18:23:29,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:23:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:29,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:23:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:30,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:23:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:30,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:30,642 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:23:30,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:23:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:31,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:23:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:31,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436314771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:31,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:31,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-01 18:23:31,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748333827] [2022-03-01 18:23:31,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:31,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:23:31,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:23:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:23:31,177 INFO L87 Difference]: Start difference. First operand 6838 states and 17138 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:34,640 INFO L93 Difference]: Finished difference Result 8248 states and 20512 transitions. [2022-03-01 18:23:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:23:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:34,651 INFO L225 Difference]: With dead ends: 8248 [2022-03-01 18:23:34,651 INFO L226 Difference]: Without dead ends: 8172 [2022-03-01 18:23:34,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=862, Invalid=6448, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 18:23:34,652 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:34,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 296 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:23:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2022-03-01 18:23:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6987. [2022-03-01 18:23:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6987 states, 6986 states have (on average 2.5052963068995133) internal successors, (17502), 6986 states have internal predecessors, (17502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 17502 transitions. [2022-03-01 18:23:34,736 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 17502 transitions. Word has length 30 [2022-03-01 18:23:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:34,736 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 17502 transitions. [2022-03-01 18:23:34,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 17502 transitions. [2022-03-01 18:23:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:34,743 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:34,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:34,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 18:23:34,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:34,944 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:23:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1908857622, now seen corresponding path program 99 times [2022-03-01 18:23:34,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:34,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032904219] [2022-03-01 18:23:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:35,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:35,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032904219] [2022-03-01 18:23:35,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032904219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:35,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012295098] [2022-03-01 18:23:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:35,255 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:35,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 18:23:35,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 18:23:35,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:35,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:23:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:36,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:36,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2022-03-01 18:23:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:42,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:43,961 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-01 18:23:43,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 74 treesize of output 243 [2022-03-01 18:24:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:34,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012295098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:34,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:34,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-01 18:24:34,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042568083] [2022-03-01 18:24:34,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:34,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:24:34,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:24:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:24:34,542 INFO L87 Difference]: Start difference. First operand 6987 states and 17502 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:24:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:40,826 INFO L93 Difference]: Finished difference Result 9822 states and 24035 transitions. [2022-03-01 18:24:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:24:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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 30 [2022-03-01 18:24:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:40,838 INFO L225 Difference]: With dead ends: 9822 [2022-03-01 18:24:40,838 INFO L226 Difference]: Without dead ends: 9757 [2022-03-01 18:24:40,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 44 SyntacticMatches, 18 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1648, Invalid=12158, Unknown=0, NotChecked=0, Total=13806 [2022-03-01 18:24:40,839 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:40,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 452 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1132 Invalid, 0 Unknown, 1254 Unchecked, 0.6s Time] [2022-03-01 18:24:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-03-01 18:24:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 7259. [2022-03-01 18:24:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 7258 states have (on average 2.4977955359603197) internal successors, (18129), 7258 states have internal predecessors, (18129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 18129 transitions. [2022-03-01 18:24:40,937 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 18129 transitions. Word has length 30 [2022-03-01 18:24:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:40,937 INFO L470 AbstractCegarLoop]: Abstraction has 7259 states and 18129 transitions. [2022-03-01 18:24:40,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 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) [2022-03-01 18:24:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 18129 transitions. [2022-03-01 18:24:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:40,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:40,945 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:40,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 18:24:41,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 18:24:41,145 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:24:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1519015272, now seen corresponding path program 100 times [2022-03-01 18:24:41,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:41,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271834996] [2022-03-01 18:24:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:41,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271834996] [2022-03-01 18:24:41,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271834996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:41,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088935690] [2022-03-01 18:24:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:41,463 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:41,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 18:24:41,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:41,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:24:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:41,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:24:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:41,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:42,329 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:24:42,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:24:42,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:42,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:24:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:42,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088935690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:42,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:42,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:24:42,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130429984] [2022-03-01 18:24:42,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:42,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:24:42,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:24:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:42,818 INFO L87 Difference]: Start difference. First operand 7259 states and 18129 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:46,352 INFO L93 Difference]: Finished difference Result 8399 states and 20728 transitions. [2022-03-01 18:24:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:24:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:46,364 INFO L225 Difference]: With dead ends: 8399 [2022-03-01 18:24:46,364 INFO L226 Difference]: Without dead ends: 8322 [2022-03-01 18:24:46,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=798, Invalid=6684, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 18:24:46,364 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 223 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:46,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 350 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:24:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2022-03-01 18:24:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7589. [2022-03-01 18:24:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 2.4965735371639433) internal successors, (18944), 7588 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 18944 transitions. [2022-03-01 18:24:46,456 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 18944 transitions. Word has length 30 [2022-03-01 18:24:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:46,457 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 18944 transitions. [2022-03-01 18:24:46,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 18944 transitions. [2022-03-01 18:24:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:46,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:46,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:46,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:46,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:46,665 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:24:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2041359046, now seen corresponding path program 101 times [2022-03-01 18:24:46,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:46,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138144556] [2022-03-01 18:24:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:46,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:46,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138144556] [2022-03-01 18:24:46,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138144556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:46,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278300075] [2022-03-01 18:24:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:46,990 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:46,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 18:24:47,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:24:47,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:47,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:24:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:47,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:47,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:24:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:47,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:47,877 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:24:47,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:24:48,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:48,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:24:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:48,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278300075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:48,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:48,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:24:48,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972095210] [2022-03-01 18:24:48,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:48,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:24:48,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:24:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:24:48,450 INFO L87 Difference]: Start difference. First operand 7589 states and 18944 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:24:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:50,674 INFO L93 Difference]: Finished difference Result 9687 states and 23583 transitions. [2022-03-01 18:24:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:24:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:24:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:50,688 INFO L225 Difference]: With dead ends: 9687 [2022-03-01 18:24:50,688 INFO L226 Difference]: Without dead ends: 9645 [2022-03-01 18:24:50,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=561, Invalid=4551, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:24:50,689 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:50,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 240 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1138 Invalid, 0 Unknown, 408 Unchecked, 0.6s Time] [2022-03-01 18:24:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2022-03-01 18:24:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 7716. [2022-03-01 18:24:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7716 states, 7715 states have (on average 2.4952689565780948) internal successors, (19251), 7715 states have internal predecessors, (19251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 19251 transitions. [2022-03-01 18:24:50,819 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 19251 transitions. Word has length 30 [2022-03-01 18:24:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:50,819 INFO L470 AbstractCegarLoop]: Abstraction has 7716 states and 19251 transitions. [2022-03-01 18:24:50,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:24:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 19251 transitions. [2022-03-01 18:24:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:50,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:50,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:50,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-01 18:24:51,028 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:24:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash -552006922, now seen corresponding path program 102 times [2022-03-01 18:24:51,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:51,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921008194] [2022-03-01 18:24:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:51,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:51,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921008194] [2022-03-01 18:24:51,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921008194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:51,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049760045] [2022-03-01 18:24:51,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:51,363 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 18:24:51,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:24:51,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:51,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:24:51,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:24:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:51,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:52,248 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:24:52,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:24:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:52,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:24:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049760045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:52,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:52,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:24:52,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225882520] [2022-03-01 18:24:52,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:24:52,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:24:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:24:52,765 INFO L87 Difference]: Start difference. First operand 7716 states and 19251 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:24:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:55,659 INFO L93 Difference]: Finished difference Result 9343 states and 22828 transitions. [2022-03-01 18:24:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:24:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:24:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:55,671 INFO L225 Difference]: With dead ends: 9343 [2022-03-01 18:24:55,671 INFO L226 Difference]: Without dead ends: 9253 [2022-03-01 18:24:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=756, Invalid=5564, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 18:24:55,672 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:55,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 184 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1191 Invalid, 0 Unknown, 256 Unchecked, 0.7s Time] [2022-03-01 18:24:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9253 states. [2022-03-01 18:24:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9253 to 7775. [2022-03-01 18:24:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7774 states have (on average 2.491381528170826) internal successors, (19368), 7774 states have internal predecessors, (19368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 19368 transitions. [2022-03-01 18:24:55,771 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 19368 transitions. Word has length 30 [2022-03-01 18:24:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:55,771 INFO L470 AbstractCegarLoop]: Abstraction has 7775 states and 19368 transitions. [2022-03-01 18:24:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:24:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 19368 transitions. [2022-03-01 18:24:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:55,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:55,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:55,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:55,979 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:24:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash -387775446, now seen corresponding path program 103 times [2022-03-01 18:24:55,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:55,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270177455] [2022-03-01 18:24:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:24:56,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:56,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270177455] [2022-03-01 18:24:56,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270177455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:56,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319983188] [2022-03-01 18:24:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:56,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:56,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:56,296 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:56,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 18:24:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:56,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:24:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:56,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:24:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:56,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:57,123 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:24:57,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:24:57,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:57,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:57,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:24:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:57,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319983188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:57,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:57,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-01 18:24:57,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182430230] [2022-03-01 18:24:57,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:57,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:57,806 INFO L87 Difference]: Start difference. First operand 7775 states and 19368 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:00,958 INFO L93 Difference]: Finished difference Result 9271 states and 22798 transitions. [2022-03-01 18:25:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:25:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:00,971 INFO L225 Difference]: With dead ends: 9271 [2022-03-01 18:25:00,972 INFO L226 Difference]: Without dead ends: 9179 [2022-03-01 18:25:00,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1012, Invalid=6128, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:25:00,973 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 296 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:00,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 346 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:25:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2022-03-01 18:25:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8147. [2022-03-01 18:25:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8147 states, 8146 states have (on average 2.480726737048858) internal successors, (20208), 8146 states have internal predecessors, (20208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 20208 transitions. [2022-03-01 18:25:01,081 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 20208 transitions. Word has length 30 [2022-03-01 18:25:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:01,081 INFO L470 AbstractCegarLoop]: Abstraction has 8147 states and 20208 transitions. [2022-03-01 18:25:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 20208 transitions. [2022-03-01 18:25:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:01,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:01,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:01,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 18:25:01,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:01,291 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:25:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1730964982, now seen corresponding path program 104 times [2022-03-01 18:25:01,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:01,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749423718] [2022-03-01 18:25:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:01,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:01,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749423718] [2022-03-01 18:25:01,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749423718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:01,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699062891] [2022-03-01 18:25:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:25:01,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:01,617 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:01,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 18:25:01,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:25:01,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:01,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:25:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:25:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:02,484 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:25:02,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:25:02,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:02,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:25:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:02,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699062891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:02,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:02,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-01 18:25:02,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403647323] [2022-03-01 18:25:02,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:25:02,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:25:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:25:02,889 INFO L87 Difference]: Start difference. First operand 8147 states and 20208 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:25:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:05,224 INFO L93 Difference]: Finished difference Result 9839 states and 23846 transitions. [2022-03-01 18:25:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:25:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-03-01 18:25:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:05,237 INFO L225 Difference]: With dead ends: 9839 [2022-03-01 18:25:05,237 INFO L226 Difference]: Without dead ends: 9794 [2022-03-01 18:25:05,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=658, Invalid=4744, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:25:05,237 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:05,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 363 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 410 Unchecked, 0.8s Time] [2022-03-01 18:25:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2022-03-01 18:25:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8058. [2022-03-01 18:25:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8058 states, 8057 states have (on average 2.4876504902569194) internal successors, (20043), 8057 states have internal predecessors, (20043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 20043 transitions. [2022-03-01 18:25:05,340 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 20043 transitions. Word has length 30 [2022-03-01 18:25:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:05,341 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 20043 transitions. [2022-03-01 18:25:05,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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) [2022-03-01 18:25:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 20043 transitions. [2022-03-01 18:25:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:05,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:05,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:05,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 18:25:05,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-03-01 18:25:05,550 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:25:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash -158977306, now seen corresponding path program 105 times [2022-03-01 18:25:05,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:05,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125577914] [2022-03-01 18:25:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:05,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:05,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125577914] [2022-03-01 18:25:05,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125577914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:05,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022769246] [2022-03-01 18:25:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:05,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:05,864 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:05,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 18:25:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:25:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:05,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:25:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:06,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:06,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2022-03-01 18:25:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:06,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:07,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:07,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-01 18:25:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:31,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022769246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:31,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:31,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 18:25:31,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694462675] [2022-03-01 18:25:31,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:31,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:25:31,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:25:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:25:31,021 INFO L87 Difference]: Start difference. First operand 8058 states and 20043 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:25:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:36,629 INFO L93 Difference]: Finished difference Result 11602 states and 28388 transitions. [2022-03-01 18:25:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:25:36,629 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-01 18:25:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:36,644 INFO L225 Difference]: With dead ends: 11602 [2022-03-01 18:25:36,644 INFO L226 Difference]: Without dead ends: 11545 [2022-03-01 18:25:36,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4469 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1996, Invalid=13010, Unknown=0, NotChecked=0, Total=15006 [2022-03-01 18:25:36,645 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 295 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:36,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 420 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 971 Invalid, 0 Unknown, 1024 Unchecked, 0.5s Time] [2022-03-01 18:25:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11545 states. [2022-03-01 18:25:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11545 to 8002. [2022-03-01 18:25:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8002 states, 8001 states have (on average 2.4905636795400574) internal successors, (19927), 8001 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 19927 transitions. [2022-03-01 18:25:36,759 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 19927 transitions. Word has length 30 [2022-03-01 18:25:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:36,759 INFO L470 AbstractCegarLoop]: Abstraction has 8002 states and 19927 transitions. [2022-03-01 18:25:36,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:25:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 19927 transitions. [2022-03-01 18:25:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:36,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:36,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:36,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-01 18:25:36,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:36,968 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:25:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1739359666, now seen corresponding path program 106 times [2022-03-01 18:25:36,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:36,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059080681] [2022-03-01 18:25:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:37,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:37,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059080681] [2022-03-01 18:25:37,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059080681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:37,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394912026] [2022-03-01 18:25:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:25:37,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:37,235 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:37,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 18:25:37,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:25:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:37,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:25:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:37,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:37,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:25:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:37,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:38,067 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:25:38,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-01 18:25:38,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:38,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:25:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:38,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394912026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:38,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:38,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-01 18:25:38,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786832370] [2022-03-01 18:25:38,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:38,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:25:38,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:25:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:25:38,442 INFO L87 Difference]: Start difference. First operand 8002 states and 19927 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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) [2022-03-01 18:25:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:40,469 INFO L93 Difference]: Finished difference Result 8930 states and 22016 transitions. [2022-03-01 18:25:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:25:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 30 [2022-03-01 18:25:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:40,481 INFO L225 Difference]: With dead ends: 8930 [2022-03-01 18:25:40,482 INFO L226 Difference]: Without dead ends: 8896 [2022-03-01 18:25:40,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=494, Invalid=3666, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:25:40,482 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 255 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:40,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 390 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1689 Invalid, 0 Unknown, 107 Unchecked, 0.8s Time] [2022-03-01 18:25:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-03-01 18:25:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8392. [2022-03-01 18:25:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8391 states have (on average 2.505780002383506) internal successors, (21026), 8391 states have internal predecessors, (21026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 21026 transitions. [2022-03-01 18:25:40,586 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 21026 transitions. Word has length 30 [2022-03-01 18:25:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:40,586 INFO L470 AbstractCegarLoop]: Abstraction has 8392 states and 21026 transitions. [2022-03-01 18:25:40,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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) [2022-03-01 18:25:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 21026 transitions. [2022-03-01 18:25:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:40,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:40,594 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:40,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 18:25:40,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:40,795 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:25:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash 335043182, now seen corresponding path program 107 times [2022-03-01 18:25:40,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:40,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180037651] [2022-03-01 18:25:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:40,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:41,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:41,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180037651] [2022-03-01 18:25:41,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180037651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:41,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767000137] [2022-03-01 18:25:41,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:25:41,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:41,056 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:41,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 18:25:41,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:25:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:41,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:25:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:41,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:25:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:41,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:41,915 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:25:41,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:25:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:42,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:25:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:42,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767000137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:42,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:42,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-01 18:25:42,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590193816] [2022-03-01 18:25:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:25:42,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:25:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:25:42,467 INFO L87 Difference]: Start difference. First operand 8392 states and 21026 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:45,675 INFO L93 Difference]: Finished difference Result 9626 states and 23879 transitions. [2022-03-01 18:25:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:25:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:45,689 INFO L225 Difference]: With dead ends: 9626 [2022-03-01 18:25:45,689 INFO L226 Difference]: Without dead ends: 9520 [2022-03-01 18:25:45,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=912, Invalid=6228, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 18:25:45,690 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 355 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:45,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 419 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:25:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-03-01 18:25:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 8462. [2022-03-01 18:25:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8461 states have (on average 2.5004136626876257) internal successors, (21156), 8461 states have internal predecessors, (21156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 21156 transitions. [2022-03-01 18:25:45,799 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 21156 transitions. Word has length 30 [2022-03-01 18:25:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:45,799 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 21156 transitions. [2022-03-01 18:25:45,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 21156 transitions. [2022-03-01 18:25:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:45,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:45,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:45,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 18:25:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:46,009 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:25:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash 129104750, now seen corresponding path program 108 times [2022-03-01 18:25:46,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:46,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273092843] [2022-03-01 18:25:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:25:46,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:46,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273092843] [2022-03-01 18:25:46,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273092843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:46,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291308523] [2022-03-01 18:25:46,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:25:46,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:46,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:46,281 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:46,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 18:25:46,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:25:46,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:46,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 18:25:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:48,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:48,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 173 [2022-03-01 18:25:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:48,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:49,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:49,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:49,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 74 treesize of output 243 [2022-03-01 18:27:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:09,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291308523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:09,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:09,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 18:27:09,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754219942] [2022-03-01 18:27:09,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:09,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:27:09,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:27:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:27:09,196 INFO L87 Difference]: Start difference. First operand 8462 states and 21156 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:27:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:14,015 INFO L93 Difference]: Finished difference Result 12357 states and 30466 transitions. [2022-03-01 18:27:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:27:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-03-01 18:27:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:14,032 INFO L225 Difference]: With dead ends: 12357 [2022-03-01 18:27:14,032 INFO L226 Difference]: Without dead ends: 12313 [2022-03-01 18:27:14,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1283, Invalid=7089, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:27:14,033 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:14,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 280 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 726 Invalid, 0 Unknown, 963 Unchecked, 0.4s Time] [2022-03-01 18:27:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2022-03-01 18:27:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 8580. [2022-03-01 18:27:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8580 states, 8579 states have (on average 2.4991257722345264) internal successors, (21440), 8579 states have internal predecessors, (21440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8580 states to 8580 states and 21440 transitions. [2022-03-01 18:27:14,163 INFO L78 Accepts]: Start accepts. Automaton has 8580 states and 21440 transitions. Word has length 30 [2022-03-01 18:27:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:14,163 INFO L470 AbstractCegarLoop]: Abstraction has 8580 states and 21440 transitions. [2022-03-01 18:27:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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) [2022-03-01 18:27:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8580 states and 21440 transitions. [2022-03-01 18:27:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:27:14,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:14,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:14,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 18:27:14,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-01 18:27:14,372 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1938423176, now seen corresponding path program 109 times [2022-03-01 18:27:14,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:14,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364202748] [2022-03-01 18:27:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:27:14,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:14,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364202748] [2022-03-01 18:27:14,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364202748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:14,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575379938] [2022-03-01 18:27:14,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:27:14,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:14,670 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:14,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 18:27:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:14,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:27:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:27:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:15,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:15,519 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:27:15,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:27:15,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:15,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:27:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:15,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575379938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:15,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:15,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:27:15,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704740587] [2022-03-01 18:27:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:15,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:27:15,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:27:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:27:15,981 INFO L87 Difference]: Start difference. First operand 8580 states and 21440 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2022-03-01 18:27:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:18,555 INFO L93 Difference]: Finished difference Result 11014 states and 27023 transitions. [2022-03-01 18:27:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:27:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 30 [2022-03-01 18:27:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:18,570 INFO L225 Difference]: With dead ends: 11014 [2022-03-01 18:27:18,570 INFO L226 Difference]: Without dead ends: 10936 [2022-03-01 18:27:18,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=668, Invalid=4588, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:27:18,571 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:18,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 334 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:27:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2022-03-01 18:27:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 8750. [2022-03-01 18:27:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 2.4878271802491714) internal successors, (21766), 8749 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 21766 transitions. [2022-03-01 18:27:18,686 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 21766 transitions. Word has length 30 [2022-03-01 18:27:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:18,686 INFO L470 AbstractCegarLoop]: Abstraction has 8750 states and 21766 transitions. [2022-03-01 18:27:18,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2022-03-01 18:27:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 21766 transitions. [2022-03-01 18:27:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:27:18,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:18,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:18,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:18,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 18:27:18,922 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash -209232786, now seen corresponding path program 110 times [2022-03-01 18:27:18,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:18,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778816089] [2022-03-01 18:27:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:19,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:19,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778816089] [2022-03-01 18:27:19,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778816089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:19,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909565842] [2022-03-01 18:27:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:27:19,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:19,217 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:19,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 18:27:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:27:19,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:19,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:27:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:19,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-01 18:27:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:19,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:20,049 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-01 18:27:20,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-01 18:27:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:20,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:27:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:27:20,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-01 18:27:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:20,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909565842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:20,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:20,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-01 18:27:20,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320023836] [2022-03-01 18:27:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:20,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:27:20,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:27:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:27:20,654 INFO L87 Difference]: Start difference. First operand 8750 states and 21766 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:23,453 INFO L93 Difference]: Finished difference Result 9575 states and 23667 transitions. [2022-03-01 18:27:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:27:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:27:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:23,466 INFO L225 Difference]: With dead ends: 9575 [2022-03-01 18:27:23,466 INFO L226 Difference]: Without dead ends: 9555 [2022-03-01 18:27:23,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=740, Invalid=5422, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:27:23,467 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 252 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:23,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 246 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:27:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2022-03-01 18:27:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 8976. [2022-03-01 18:27:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8975 states have (on average 2.4892479108635097) internal successors, (22341), 8975 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 22341 transitions. [2022-03-01 18:27:23,571 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 22341 transitions. Word has length 30 [2022-03-01 18:27:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:23,571 INFO L470 AbstractCegarLoop]: Abstraction has 8976 states and 22341 transitions. [2022-03-01 18:27:23,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 22341 transitions. [2022-03-01 18:27:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:23,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:23,580 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:23,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 18:27:23,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 18:27:23,781 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash -300802278, now seen corresponding path program 111 times [2022-03-01 18:27:23,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:23,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030891065] [2022-03-01 18:27:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:23,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:23,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:23,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030891065] [2022-03-01 18:27:23,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030891065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:23,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325686645] [2022-03-01 18:27:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:27:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:23,889 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:23,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 18:27:23,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 18:27:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:24,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:24,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325686645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:24,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:24,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:27:24,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168025554] [2022-03-01 18:27:24,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:24,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:27:24,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:27:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:27:24,310 INFO L87 Difference]: Start difference. First operand 8976 states and 22341 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-01 18:27:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:25,750 INFO L93 Difference]: Finished difference Result 10585 states and 25843 transitions. [2022-03-01 18:27:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 18:27:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 [2022-03-01 18:27:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:25,764 INFO L225 Difference]: With dead ends: 10585 [2022-03-01 18:27:25,765 INFO L226 Difference]: Without dead ends: 10585 [2022-03-01 18:27:25,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:27:25,766 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 284 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:25,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 178 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:27:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2022-03-01 18:27:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 7908. [2022-03-01 18:27:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7908 states, 7907 states have (on average 2.48197799418237) internal successors, (19625), 7907 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 19625 transitions. [2022-03-01 18:27:25,867 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 19625 transitions. Word has length 32 [2022-03-01 18:27:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 7908 states and 19625 transitions. [2022-03-01 18:27:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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) [2022-03-01 18:27:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 19625 transitions. [2022-03-01 18:27:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:25,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:25,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:25,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 18:27:26,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-01 18:27:26,091 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1150918110, now seen corresponding path program 112 times [2022-03-01 18:27:26,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:26,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839984269] [2022-03-01 18:27:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:26,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:26,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839984269] [2022-03-01 18:27:26,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839984269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:26,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381752968] [2022-03-01 18:27:26,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:27:26,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:26,184 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:26,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 18:27:26,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:27:26,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:26,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:26,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:26,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381752968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:26,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:26,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 18:27:26,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903193722] [2022-03-01 18:27:26,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:26,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:26,594 INFO L87 Difference]: Start difference. First operand 7908 states and 19625 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) [2022-03-01 18:27:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:28,085 INFO L93 Difference]: Finished difference Result 11962 states and 29058 transitions. [2022-03-01 18:27:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:27:28,085 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 [2022-03-01 18:27:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:28,102 INFO L225 Difference]: With dead ends: 11962 [2022-03-01 18:27:28,103 INFO L226 Difference]: Without dead ends: 11858 [2022-03-01 18:27:28,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2122, Invalid=6434, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:27:28,104 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 617 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:28,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 189 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:27:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11858 states. [2022-03-01 18:27:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11858 to 8382. [2022-03-01 18:27:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 8381 states have (on average 2.4921847034960027) internal successors, (20887), 8381 states have internal predecessors, (20887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 20887 transitions. [2022-03-01 18:27:28,276 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 20887 transitions. Word has length 32 [2022-03-01 18:27:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:28,276 INFO L470 AbstractCegarLoop]: Abstraction has 8382 states and 20887 transitions. [2022-03-01 18:27:28,276 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) [2022-03-01 18:27:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 20887 transitions. [2022-03-01 18:27:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:28,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:28,284 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:28,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-01 18:27:28,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:28,485 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1474861086, now seen corresponding path program 113 times [2022-03-01 18:27:28,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:28,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105173649] [2022-03-01 18:27:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:28,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:28,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105173649] [2022-03-01 18:27:28,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105173649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:28,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975748123] [2022-03-01 18:27:28,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:27:28,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:28,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:28,563 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:28,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 18:27:28,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 18:27:28,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:28,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:29,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975748123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:29,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:29,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-01 18:27:29,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836559318] [2022-03-01 18:27:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:29,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:27:29,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:27:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:27:29,060 INFO L87 Difference]: Start difference. First operand 8382 states and 20887 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-01 18:27:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:31,079 INFO L93 Difference]: Finished difference Result 14128 states and 34642 transitions. [2022-03-01 18:27:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:27:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 [2022-03-01 18:27:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:31,096 INFO L225 Difference]: With dead ends: 14128 [2022-03-01 18:27:31,097 INFO L226 Difference]: Without dead ends: 14116 [2022-03-01 18:27:31,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5451 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:27:31,097 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 498 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:31,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 244 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:27:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14116 states. [2022-03-01 18:27:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14116 to 10452. [2022-03-01 18:27:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.5024399578987655) internal successors, (26153), 10451 states have internal predecessors, (26153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 26153 transitions. [2022-03-01 18:27:31,256 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 26153 transitions. Word has length 32 [2022-03-01 18:27:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:31,256 INFO L470 AbstractCegarLoop]: Abstraction has 10452 states and 26153 transitions. [2022-03-01 18:27:31,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-01 18:27:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 26153 transitions. [2022-03-01 18:27:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:31,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:31,266 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:31,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:31,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:31,466 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1806539874, now seen corresponding path program 114 times [2022-03-01 18:27:31,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:31,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490449392] [2022-03-01 18:27:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:31,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:31,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490449392] [2022-03-01 18:27:31,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490449392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:31,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484446695] [2022-03-01 18:27:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:27:31,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:31,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:31,558 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:31,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 18:27:31,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 18:27:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:31,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:32,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484446695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:32,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:32,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-01 18:27:32,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764868334] [2022-03-01 18:27:32,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:32,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:32,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:32,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:32,015 INFO L87 Difference]: Start difference. First operand 10452 states and 26153 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-03-01 18:27:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:33,058 INFO L93 Difference]: Finished difference Result 10899 states and 27011 transitions. [2022-03-01 18:27:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:27:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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 [2022-03-01 18:27:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:33,072 INFO L225 Difference]: With dead ends: 10899 [2022-03-01 18:27:33,073 INFO L226 Difference]: Without dead ends: 10895 [2022-03-01 18:27:33,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:27:33,073 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 256 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:33,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 90 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:27:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2022-03-01 18:27:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10388. [2022-03-01 18:27:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10388 states, 10387 states have (on average 2.502743814383364) internal successors, (25996), 10387 states have internal predecessors, (25996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10388 states to 10388 states and 25996 transitions. [2022-03-01 18:27:33,198 INFO L78 Accepts]: Start accepts. Automaton has 10388 states and 25996 transitions. Word has length 32 [2022-03-01 18:27:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:33,198 INFO L470 AbstractCegarLoop]: Abstraction has 10388 states and 25996 transitions. [2022-03-01 18:27:33,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 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) [2022-03-01 18:27:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 10388 states and 25996 transitions. [2022-03-01 18:27:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:33,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:33,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:33,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 18:27:33,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-01 18:27:33,408 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2054156772, now seen corresponding path program 115 times [2022-03-01 18:27:33,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:33,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98175414] [2022-03-01 18:27:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:27:33,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98175414] [2022-03-01 18:27:33,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98175414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784358187] [2022-03-01 18:27:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:27:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:33,479 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:33,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 18:27:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:33,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:33,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784358187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:33,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:33,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-01 18:27:33,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442312947] [2022-03-01 18:27:33,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:33,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:33,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:33,953 INFO L87 Difference]: Start difference. First operand 10388 states and 25996 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-03-01 18:27:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:35,101 INFO L93 Difference]: Finished difference Result 13056 states and 32403 transitions. [2022-03-01 18:27:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:27:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 [2022-03-01 18:27:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:35,119 INFO L225 Difference]: With dead ends: 13056 [2022-03-01 18:27:35,119 INFO L226 Difference]: Without dead ends: 13041 [2022-03-01 18:27:35,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:27:35,120 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 441 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:35,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 132 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:27:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13041 states. [2022-03-01 18:27:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13041 to 10636. [2022-03-01 18:27:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 2.510766337564645) internal successors, (26702), 10635 states have internal predecessors, (26702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 26702 transitions. [2022-03-01 18:27:35,294 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 26702 transitions. Word has length 32 [2022-03-01 18:27:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:35,294 INFO L470 AbstractCegarLoop]: Abstraction has 10636 states and 26702 transitions. [2022-03-01 18:27:35,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-03-01 18:27:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 26702 transitions. [2022-03-01 18:27:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:35,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:35,305 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:35,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 18:27:35,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:35,505 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1796277502, now seen corresponding path program 116 times [2022-03-01 18:27:35,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:35,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028300206] [2022-03-01 18:27:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:35,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:35,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028300206] [2022-03-01 18:27:35,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028300206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:35,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307970324] [2022-03-01 18:27:35,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:27:35,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:35,582 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:35,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 18:27:35,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:27:35,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:35,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:36,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307970324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:36,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:36,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-01 18:27:36,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076056071] [2022-03-01 18:27:36,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:36,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:36,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:36,057 INFO L87 Difference]: Start difference. First operand 10636 states and 26702 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 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) [2022-03-01 18:27:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:37,145 INFO L93 Difference]: Finished difference Result 11860 states and 29329 transitions. [2022-03-01 18:27:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:27:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 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 [2022-03-01 18:27:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:37,162 INFO L225 Difference]: With dead ends: 11860 [2022-03-01 18:27:37,162 INFO L226 Difference]: Without dead ends: 11844 [2022-03-01 18:27:37,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:27:37,164 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 249 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:37,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 151 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:27:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-03-01 18:27:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 10828. [2022-03-01 18:27:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10828 states, 10827 states have (on average 2.5161171146208554) internal successors, (27242), 10827 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10828 states to 10828 states and 27242 transitions. [2022-03-01 18:27:37,300 INFO L78 Accepts]: Start accepts. Automaton has 10828 states and 27242 transitions. Word has length 32 [2022-03-01 18:27:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:37,300 INFO L470 AbstractCegarLoop]: Abstraction has 10828 states and 27242 transitions. [2022-03-01 18:27:37,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 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) [2022-03-01 18:27:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10828 states and 27242 transitions. [2022-03-01 18:27:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:37,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:37,310 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:37,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 18:27:37,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:37,510 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash -484301822, now seen corresponding path program 117 times [2022-03-01 18:27:37,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:37,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467352679] [2022-03-01 18:27:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:37,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:37,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467352679] [2022-03-01 18:27:37,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467352679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:37,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110033865] [2022-03-01 18:27:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:27:37,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:37,589 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:37,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 18:27:37,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 18:27:37,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:37,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:38,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110033865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:38,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:38,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-01 18:27:38,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288922659] [2022-03-01 18:27:38,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:38,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:38,005 INFO L87 Difference]: Start difference. First operand 10828 states and 27242 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-01 18:27:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:39,076 INFO L93 Difference]: Finished difference Result 12409 states and 30669 transitions. [2022-03-01 18:27:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:27:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 [2022-03-01 18:27:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:39,094 INFO L225 Difference]: With dead ends: 12409 [2022-03-01 18:27:39,094 INFO L226 Difference]: Without dead ends: 12383 [2022-03-01 18:27:39,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:27:39,096 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:39,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:27:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2022-03-01 18:27:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 10973. [2022-03-01 18:27:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10973 states, 10972 states have (on average 2.5203244622675904) internal successors, (27653), 10972 states have internal predecessors, (27653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10973 states to 10973 states and 27653 transitions. [2022-03-01 18:27:39,245 INFO L78 Accepts]: Start accepts. Automaton has 10973 states and 27653 transitions. Word has length 32 [2022-03-01 18:27:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:39,245 INFO L470 AbstractCegarLoop]: Abstraction has 10973 states and 27653 transitions. [2022-03-01 18:27:39,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-01 18:27:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 10973 states and 27653 transitions. [2022-03-01 18:27:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:39,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:39,255 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:39,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-01 18:27:39,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-01 18:27:39,455 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:39,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1898908930, now seen corresponding path program 118 times [2022-03-01 18:27:39,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:39,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47648605] [2022-03-01 18:27:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:39,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:39,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:39,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47648605] [2022-03-01 18:27:39,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47648605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:39,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817952328] [2022-03-01 18:27:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:27:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:39,542 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 18:27:39,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:27:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:27:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:39,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:27:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:27:39,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817952328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:27:39,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:27:39,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-01 18:27:39,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129046022] [2022-03-01 18:27:39,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:27:39,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:27:39,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:27:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:27:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:27:39,956 INFO L87 Difference]: Start difference. First operand 10973 states and 27653 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-03-01 18:27:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:27:41,023 INFO L93 Difference]: Finished difference Result 12772 states and 31586 transitions. [2022-03-01 18:27:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:27:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 [2022-03-01 18:27:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:27:41,041 INFO L225 Difference]: With dead ends: 12772 [2022-03-01 18:27:41,041 INFO L226 Difference]: Without dead ends: 12742 [2022-03-01 18:27:41,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 18:27:41,041 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 364 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:27:41,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 136 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:27:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2022-03-01 18:27:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 9625. [2022-03-01 18:27:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 2.511118038237739) internal successors, (24167), 9624 states have internal predecessors, (24167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:27:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 24167 transitions. [2022-03-01 18:27:41,191 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 24167 transitions. Word has length 32 [2022-03-01 18:27:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:27:41,191 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 24167 transitions. [2022-03-01 18:27:41,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-03-01 18:27:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 24167 transitions. [2022-03-01 18:27:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 18:27:41,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:27:41,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:27:41,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 18:27:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 18:27:41,400 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:27:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:27:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 384942132, now seen corresponding path program 119 times [2022-03-01 18:27:41,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:27:41,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552859845] [2022-03-01 18:27:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:27:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:27:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:27:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:27:41,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:27:41,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552859845] [2022-03-01 18:27:41,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552859845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:27:41,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970233947] [2022-03-01 18:27:41,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:27:41,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:27:41,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:27:41,507 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:27:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 18:27:41,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 18:27:41,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:27:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:27:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-03-01 18:27:41,627 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-01 18:27:41,632 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 18:27:41,635 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 [2022-03-01 18:27:41,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 18:27:41,658 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:27:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 18:27:41,839 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. [2022-03-01 18:27:41,841 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 18:27:41,841 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 18:27:41,844 INFO L732 BasicCegarLoop]: Path program histogram: [119, 2, 2, 1] [2022-03-01 18:27:41,846 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:27:41,846 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:27:41,848 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:27:41 BasicIcfg [2022-03-01 18:27:41,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:27:41,848 INFO L158 Benchmark]: Toolchain (without parser) took 774215.52ms. Allocated memory was 186.6MB in the beginning and 716.2MB in the end (delta: 529.5MB). Free memory was 144.2MB in the beginning and 292.0MB in the end (delta: -147.9MB). Peak memory consumption was 382.2MB. Max. memory is 8.0GB. [2022-03-01 18:27:41,848 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 186.6MB. Free memory is still 145.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:27:41,848 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.78ms. Allocated memory is still 186.6MB. Free memory was 144.2MB in the beginning and 142.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:27:41,848 INFO L158 Benchmark]: Boogie Preprocessor took 17.76ms. Allocated memory is still 186.6MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 928.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:27:41,848 INFO L158 Benchmark]: RCFGBuilder took 250.66ms. Allocated memory is still 186.6MB. Free memory was 141.6MB in the beginning and 132.9MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:27:41,848 INFO L158 Benchmark]: TraceAbstraction took 773913.79ms. Allocated memory was 186.6MB in the beginning and 716.2MB in the end (delta: 529.5MB). Free memory was 132.4MB in the beginning and 292.0MB in the end (delta: -159.7MB). Peak memory consumption was 370.6MB. Max. memory is 8.0GB. [2022-03-01 18:27:41,849 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 0.13ms. Allocated memory is still 186.6MB. Free memory is still 145.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.78ms. Allocated memory is still 186.6MB. Free memory was 144.2MB in the beginning and 142.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.76ms. Allocated memory is still 186.6MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 928.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 250.66ms. Allocated memory is still 186.6MB. Free memory was 141.6MB in the beginning and 132.9MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 773913.79ms. Allocated memory was 186.6MB in the beginning and 716.2MB in the end (delta: 529.5MB). Free memory was 132.4MB in the beginning and 292.0MB in the end (delta: -159.7MB). Peak memory consumption was 370.6MB. 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: 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 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 45]: 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 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 773.8s, OverallIterations: 124, TraceHistogramMax: 5, PathProgramHistogramMax: 119, EmptinessCheckTime: 0.5s, AutomataDifference: 204.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25483 SdHoareTripleChecker+Valid, 44.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25483 mSDsluCounter, 23573 SdHoareTripleChecker+Invalid, 37.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 20779 IncrementalHoareTripleChecker+Unchecked, 39417 mSDsCounter, 7739 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 82640 IncrementalHoareTripleChecker+Invalid, 111158 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7739 mSolverCounterUnsat, 2133 mSDtfsCounter, 82640 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12421 GetRequests, 4486 SyntacticMatches, 560 SemanticMatches, 7375 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 162584 ImplicationChecksByTransitivity, 203.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10973occurred in iteration=122, InterpolantAutomatonStates: 5677, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 123 MinimizatonAttempts, 106782 StatesRemovedByMinimization, 123 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 533.7s InterpolantComputationTime, 6470 NumberOfCodeBlocks, 6470 NumberOfCodeBlocksAsserted, 491 NumberOfCheckSat, 9313 ConstructedInterpolants, 583 QuantifiedInterpolants, 181423 SizeOfPredicates, 798 NumberOfNonLiveVariables, 7177 ConjunctsInSsa, 2739 ConjunctsInUnsatCore, 361 InterpolantComputations, 5 PerfectInterpolantSequences, 1520/8142 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