/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/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 18:48:55,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 18:48:55,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 18:48:55,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 18:48:56,046 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 [2022-03-03 18:48:56,078 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 18:48:56,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 18:48:56,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 18:48:56,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 18:48:56,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 18:48:56,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 18:48:56,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 18:48:56,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 18:48:56,083 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 18:48:56,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 18:48:56,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 18:48:56,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 18:48:56,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 18:48:56,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 18:48:56,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 18:48:56,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 18:48:56,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 18:48:56,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:48:56,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 18:48:56,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 18:48:56,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 18:48:56,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 18:48:56,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 18:48:56,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 18:48:56,329 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 18:48:56,330 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 18:48:56,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2022-03-03 18:48:56,331 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2022-03-03 18:48:56,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 18:48:56,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 18:48:56,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 18:48:56,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 18:48:56,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 18:48:56,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,375 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 18:48:56,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 18:48:56,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 18:48:56,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 18:48:56,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 18:48:56,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 18:48:56,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 18:48:56,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 18:48:56,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 18:48:56,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/1) ... [2022-03-03 18:48:56,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:48:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:56,417 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) [2022-03-03 18:48:56,435 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 [2022-03-03 18:48:56,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 18:48:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 18:48:56,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 18:48:56,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 18:48:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 18:48:56,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 18:48:56,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 18:48:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 18:48:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 18:48:56,455 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 18:48:56,498 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 18:48:56,499 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 18:48:56,589 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 18:48:56,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 18:48:56,652 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-03 18:48:56,653 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-03 18:48:56,660 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:48:56 BoogieIcfgContainer [2022-03-03 18:48:56,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 18:48:56,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 18:48:56,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 18:48:56,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 18:48:56,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:48:56" (1/2) ... [2022-03-03 18:48:56,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22805367 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 06:48:56, skipping insertion in model container [2022-03-03 18:48:56,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:48:56" (2/2) ... [2022-03-03 18:48:56,674 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2022-03-03 18:48:56,678 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 18:48:56,678 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 18:48:56,678 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 18:48:56,679 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 18:48:56,713 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 18:48:56,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 18:48:56,754 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 [2022-03-03 18:48:56,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 18:48:56,763 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-03-03 18:48:56,777 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-03 18:48:56,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:56,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:56,787 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1075696567, now seen corresponding path program 1 times [2022-03-03 18:48:56,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:56,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511285344] [2022-03-03 18:48:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:56,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:56,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:56,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511285344] [2022-03-03 18:48:56,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511285344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:48:56,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:48:56,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:48:56,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526923910] [2022-03-03 18:48:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:48:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:48:56,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:48:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:48:57,031 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:57,125 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2022-03-03 18:48:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:48:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-03 18:48:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:57,135 INFO L225 Difference]: With dead ends: 26 [2022-03-03 18:48:57,135 INFO L226 Difference]: Without dead ends: 18 [2022-03-03 18:48:57,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-03 18:48:57,149 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:57,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:48:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-03 18:48:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-03 18:48:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2022-03-03 18:48:57,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2022-03-03 18:48:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:57,204 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2022-03-03 18:48:57,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2022-03-03 18:48:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-03 18:48:57,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:57,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:57,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 18:48:57,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1105428867, now seen corresponding path program 2 times [2022-03-03 18:48:57,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:57,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723042590] [2022-03-03 18:48:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:57,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:57,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723042590] [2022-03-03 18:48:57,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723042590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:48:57,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:48:57,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 18:48:57,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979860465] [2022-03-03 18:48:57,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:48:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 18:48:57,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:48:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 18:48:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:48:57,289 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:48:57,322 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2022-03-03 18:48:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 18:48:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-03 18:48:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:48:57,324 INFO L225 Difference]: With dead ends: 28 [2022-03-03 18:48:57,324 INFO L226 Difference]: Without dead ends: 23 [2022-03-03 18:48:57,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 18:48:57,326 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:48:57,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:48:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-03 18:48:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-03 18:48:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-03-03 18:48:57,331 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-03-03 18:48:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:48:57,332 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-03-03 18:48:57,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:48:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-03-03 18:48:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-03 18:48:57,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:48:57,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:48:57,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 18:48:57,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:48:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:48:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -883720444, now seen corresponding path program 1 times [2022-03-03 18:48:57,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:48:57,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964244983] [2022-03-03 18:48:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:48:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:48:57,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:48:57,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964244983] [2022-03-03 18:48:57,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964244983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:48:57,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573743342] [2022-03-03 18:48:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:48:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:48:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:48:57,715 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) [2022-03-03 18:48:57,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 18:48:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:48:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:48:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:01,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 18:49:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:01,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:02,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:02,521 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 107 [2022-03-03 18:49:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:03,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573743342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:03,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:03,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-03-03 18:49:03,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833130112] [2022-03-03 18:49:03,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:03,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 18:49:03,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 18:49:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-03 18:49:03,223 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:03,376 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2022-03-03 18:49:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:49:03,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-03 18:49:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:03,378 INFO L225 Difference]: With dead ends: 42 [2022-03-03 18:49:03,378 INFO L226 Difference]: Without dead ends: 34 [2022-03-03 18:49:03,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:49:03,382 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:03,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:49:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-03 18:49:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-03-03 18:49:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 47 transitions. [2022-03-03 18:49:03,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 47 transitions. Word has length 11 [2022-03-03 18:49:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:03,397 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 47 transitions. [2022-03-03 18:49:03,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 47 transitions. [2022-03-03 18:49:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-03 18:49:03,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:03,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:03,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 18:49:03,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:03,623 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash -913452744, now seen corresponding path program 2 times [2022-03-03 18:49:03,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:03,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895844625] [2022-03-03 18:49:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:03,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:03,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895844625] [2022-03-03 18:49:03,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895844625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:03,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336001470] [2022-03-03 18:49:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:49:03,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:03,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:03,799 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) [2022-03-03 18:49:03,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 18:49:03,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:49:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:10,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:10,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2022-03-03 18:49:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:10,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:10,949 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 107 [2022-03-03 18:49:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:11,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336001470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:11,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:11,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 18:49:11,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139823964] [2022-03-03 18:49:11,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:11,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 18:49:11,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 18:49:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:49:11,630 INFO L87 Difference]: Start difference. First operand 25 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:11,935 INFO L93 Difference]: Finished difference Result 42 states and 74 transitions. [2022-03-03 18:49:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:49:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-03 18:49:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:11,936 INFO L225 Difference]: With dead ends: 42 [2022-03-03 18:49:11,936 INFO L226 Difference]: Without dead ends: 32 [2022-03-03 18:49:11,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:49:11,937 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:11,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:49:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-03 18:49:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-03-03 18:49:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 47 transitions. [2022-03-03 18:49:11,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 47 transitions. Word has length 11 [2022-03-03 18:49:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:11,941 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 47 transitions. [2022-03-03 18:49:11,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 47 transitions. [2022-03-03 18:49:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-03 18:49:11,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:11,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:11,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:12,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-03 18:49:12,143 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 859804100, now seen corresponding path program 3 times [2022-03-03 18:49:12,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:12,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752917706] [2022-03-03 18:49:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:12,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:12,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752917706] [2022-03-03 18:49:12,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752917706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:12,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940309116] [2022-03-03 18:49:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:49:12,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:12,212 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) [2022-03-03 18:49:12,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 18:49:12,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 18:49:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 18:49:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:12,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:12,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2022-03-03 18:49:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:12,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:13,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:13,001 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 114 [2022-03-03 18:49:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:13,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940309116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:13,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:13,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-03 18:49:13,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585168778] [2022-03-03 18:49:13,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:13,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:49:13,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:49:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:49:13,820 INFO L87 Difference]: Start difference. First operand 25 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:13,936 INFO L93 Difference]: Finished difference Result 56 states and 98 transitions. [2022-03-03 18:49:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:49:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-03 18:49:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:13,938 INFO L225 Difference]: With dead ends: 56 [2022-03-03 18:49:13,938 INFO L226 Difference]: Without dead ends: 46 [2022-03-03 18:49:13,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:49:13,939 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:13,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:49:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-03 18:49:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-03-03 18:49:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 53 transitions. [2022-03-03 18:49:13,943 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 53 transitions. Word has length 11 [2022-03-03 18:49:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:13,944 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 53 transitions. [2022-03-03 18:49:13,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 53 transitions. [2022-03-03 18:49:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 18:49:13,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:13,945 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:13,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:14,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:14,160 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 772572073, now seen corresponding path program 4 times [2022-03-03 18:49:14,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:14,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903794099] [2022-03-03 18:49:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:14,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:14,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903794099] [2022-03-03 18:49:14,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903794099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:14,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174623679] [2022-03-03 18:49:14,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:49:14,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:14,303 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) [2022-03-03 18:49:14,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 18:49:14,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:49:14,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 18:49:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:14,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:14,443 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2022-03-03 18:49:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:14,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:15,111 INFO L353 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2022-03-03 18:49:15,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 13 treesize of output 86 [2022-03-03 18:49:15,266 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-03-03 18:49:15,266 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-03-03 18:49:15,327 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-03-03 18:49:15,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 9 treesize of output 27 [2022-03-03 18:49:15,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:15,352 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 16 [2022-03-03 18:49:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:15,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174623679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:15,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:15,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-03 18:49:15,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311851883] [2022-03-03 18:49:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 18:49:15,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:15,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 18:49:15,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 18:49:15,367 INFO L87 Difference]: Start difference. First operand 29 states and 53 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:15,626 INFO L93 Difference]: Finished difference Result 55 states and 97 transitions. [2022-03-03 18:49:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:49:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 18:49:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:15,627 INFO L225 Difference]: With dead ends: 55 [2022-03-03 18:49:15,627 INFO L226 Difference]: Without dead ends: 47 [2022-03-03 18:49:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-03 18:49:15,628 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:15,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:49:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-03 18:49:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2022-03-03 18:49:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 33 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) [2022-03-03 18:49:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 66 transitions. [2022-03-03 18:49:15,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 66 transitions. Word has length 12 [2022-03-03 18:49:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 66 transitions. [2022-03-03 18:49:15,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 66 transitions. [2022-03-03 18:49:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 18:49:15,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:15,633 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:15,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 18:49:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:15,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 742839773, now seen corresponding path program 5 times [2022-03-03 18:49:15,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:15,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859804405] [2022-03-03 18:49:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:15,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:15,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859804405] [2022-03-03 18:49:15,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859804405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:15,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752299982] [2022-03-03 18:49:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:49:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:15,981 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) [2022-03-03 18:49:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 18:49:16,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:49:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 18:49:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:31,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:31,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-03-03 18:49:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:31,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:49:32,411 INFO L353 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2022-03-03 18:49:32,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 13 treesize of output 86 [2022-03-03 18:49:32,654 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-03-03 18:49:32,655 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-03-03 18:49:32,727 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-03-03 18:49:32,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 9 treesize of output 27 [2022-03-03 18:49:32,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:49:32,756 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 16 [2022-03-03 18:49:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:32,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752299982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:49:32,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:49:32,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-03 18:49:32,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620988453] [2022-03-03 18:49:32,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:49:32,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 18:49:32,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:49:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 18:49:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:49:32,774 INFO L87 Difference]: Start difference. First operand 34 states and 66 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:49:33,149 INFO L93 Difference]: Finished difference Result 53 states and 96 transitions. [2022-03-03 18:49:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 18:49:33,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 18:49:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:49:33,150 INFO L225 Difference]: With dead ends: 53 [2022-03-03 18:49:33,150 INFO L226 Difference]: Without dead ends: 43 [2022-03-03 18:49:33,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:49:33,151 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:49:33,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 26 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:49:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-03 18:49:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-03-03 18:49:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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) [2022-03-03 18:49:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-03 18:49:33,156 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-03 18:49:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:49:33,156 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-03 18:49:33,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:49:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-03 18:49:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 18:49:33,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:49:33,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:49:33,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-03 18:49:33,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:33,375 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:49:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:49:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1778870679, now seen corresponding path program 6 times [2022-03-03 18:49:33,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:49:33,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851903012] [2022-03-03 18:49:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:49:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:49:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:49:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:49:33,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:49:33,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851903012] [2022-03-03 18:49:33,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851903012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:49:33,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097266253] [2022-03-03 18:49:33,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:49:33,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:49:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:49:33,514 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) [2022-03-03 18:49:33,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 18:49:33,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 18:49:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:49:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 18:49:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:49:45,612 WARN L228 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 2188 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-03 18:50:16,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:16,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-03-03 18:50:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:17,259 INFO L353 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2022-03-03 18:50:17,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 13 treesize of output 86 [2022-03-03 18:50:17,569 INFO L353 Elim1Store]: treesize reduction 10, result has 79.6 percent of original size [2022-03-03 18:50:17,570 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 11 treesize of output 50 [2022-03-03 18:50:17,627 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-03-03 18:50:17,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 9 treesize of output 27 [2022-03-03 18:50:17,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:17,658 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 16 [2022-03-03 18:50:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:17,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097266253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:17,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:17,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:50:17,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81919474] [2022-03-03 18:50:17,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:17,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:50:17,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:50:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:50:17,679 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:17,831 INFO L93 Difference]: Finished difference Result 66 states and 116 transitions. [2022-03-03 18:50:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:50:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 18:50:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:17,832 INFO L225 Difference]: With dead ends: 66 [2022-03-03 18:50:17,833 INFO L226 Difference]: Without dead ends: 56 [2022-03-03 18:50:17,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:50:17,833 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:17,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 40 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-03 18:50:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-03-03 18:50:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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) [2022-03-03 18:50:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-03 18:50:17,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-03 18:50:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-03 18:50:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-03 18:50:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 18:50:17,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:17,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:17,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:18,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:18,041 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:18,042 INFO L85 PathProgramCache]: Analyzing trace with hash -65515201, now seen corresponding path program 1 times [2022-03-03 18:50:18,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:18,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240134192] [2022-03-03 18:50:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 18:50:18,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:18,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240134192] [2022-03-03 18:50:18,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240134192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:50:18,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:50:18,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 18:50:18,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597603403] [2022-03-03 18:50:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:50:18,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 18:50:18,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 18:50:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 18:50:18,063 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:18,081 INFO L93 Difference]: Finished difference Result 39 states and 74 transitions. [2022-03-03 18:50:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 18:50:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 18:50:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:18,082 INFO L225 Difference]: With dead ends: 39 [2022-03-03 18:50:18,082 INFO L226 Difference]: Without dead ends: 39 [2022-03-03 18:50:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 18:50:18,083 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:18,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-03 18:50:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-03-03 18:50:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 65 transitions. [2022-03-03 18:50:18,091 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 65 transitions. Word has length 12 [2022-03-03 18:50:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:18,091 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 65 transitions. [2022-03-03 18:50:18,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 65 transitions. [2022-03-03 18:50:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 18:50:18,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:18,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:18,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-03 18:50:18,092 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -985215909, now seen corresponding path program 1 times [2022-03-03 18:50:18,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:18,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116413917] [2022-03-03 18:50:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:18,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116413917] [2022-03-03 18:50:18,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116413917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863046752] [2022-03-03 18:50:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:18,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:18,131 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) [2022-03-03 18:50:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 18:50:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 18:50:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:18,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863046752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:18,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:18,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-03-03 18:50:18,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629994321] [2022-03-03 18:50:18,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:18,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 18:50:18,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 18:50:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:50:18,223 INFO L87 Difference]: Start difference. First operand 34 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:18,339 INFO L93 Difference]: Finished difference Result 78 states and 143 transitions. [2022-03-03 18:50:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:50:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 18:50:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:18,341 INFO L225 Difference]: With dead ends: 78 [2022-03-03 18:50:18,341 INFO L226 Difference]: Without dead ends: 78 [2022-03-03 18:50:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:50:18,342 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-03 18:50:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-03-03 18:50:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 89 transitions. [2022-03-03 18:50:18,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 89 transitions. Word has length 12 [2022-03-03 18:50:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:18,346 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 89 transitions. [2022-03-03 18:50:18,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 89 transitions. [2022-03-03 18:50:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 18:50:18,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:18,347 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:18,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:18,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:18,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 455754980, now seen corresponding path program 7 times [2022-03-03 18:50:18,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:18,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518074791] [2022-03-03 18:50:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:18,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:18,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518074791] [2022-03-03 18:50:18,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518074791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:18,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523589415] [2022-03-03 18:50:18,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:18,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:18,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:18,632 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) [2022-03-03 18:50:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 18:50:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 18:50:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:19,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:19,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-03-03 18:50:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:19,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:19,675 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 194 [2022-03-03 18:50:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:24,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523589415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:24,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:24,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 18:50:24,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574654603] [2022-03-03 18:50:24,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:24,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 18:50:24,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 18:50:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:50:24,285 INFO L87 Difference]: Start difference. First operand 43 states and 89 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:24,451 INFO L93 Difference]: Finished difference Result 83 states and 144 transitions. [2022-03-03 18:50:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:50:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 18:50:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:24,452 INFO L225 Difference]: With dead ends: 83 [2022-03-03 18:50:24,452 INFO L226 Difference]: Without dead ends: 78 [2022-03-03 18:50:24,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-03 18:50:24,453 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:24,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-03 18:50:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-03-03 18:50:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 89 transitions. [2022-03-03 18:50:24,456 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 89 transitions. Word has length 13 [2022-03-03 18:50:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:24,456 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 89 transitions. [2022-03-03 18:50:24,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 89 transitions. [2022-03-03 18:50:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:24,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:24,457 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:24,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:24,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 18:50:24,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1564758715, now seen corresponding path program 2 times [2022-03-03 18:50:24,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:24,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698756295] [2022-03-03 18:50:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:24,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:24,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698756295] [2022-03-03 18:50:24,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698756295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:24,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374117043] [2022-03-03 18:50:24,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:50:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:24,729 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) [2022-03-03 18:50:24,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 18:50:24,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:50:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:24,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:24,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374117043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:24,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:24,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:24,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538149730] [2022-03-03 18:50:24,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:24,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:24,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:24,820 INFO L87 Difference]: Start difference. First operand 43 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:24,914 INFO L93 Difference]: Finished difference Result 110 states and 198 transitions. [2022-03-03 18:50:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 18:50:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:24,915 INFO L225 Difference]: With dead ends: 110 [2022-03-03 18:50:24,915 INFO L226 Difference]: Without dead ends: 105 [2022-03-03 18:50:24,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-03 18:50:24,916 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:24,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-03 18:50:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2022-03-03 18:50:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.34) internal successors, (117), 50 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 117 transitions. [2022-03-03 18:50:24,920 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 117 transitions. Word has length 14 [2022-03-03 18:50:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:24,920 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 117 transitions. [2022-03-03 18:50:24,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 117 transitions. [2022-03-03 18:50:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:24,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:24,921 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:24,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:25,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:25,144 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1157725431, now seen corresponding path program 8 times [2022-03-03 18:50:25,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:25,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633573317] [2022-03-03 18:50:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:25,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:25,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633573317] [2022-03-03 18:50:25,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633573317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:25,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607534810] [2022-03-03 18:50:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:50:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:25,189 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) [2022-03-03 18:50:25,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 18:50:25,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:50:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607534810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:25,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:25,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:25,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905999859] [2022-03-03 18:50:25,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:25,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:25,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:25,269 INFO L87 Difference]: Start difference. First operand 51 states and 117 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:25,336 INFO L93 Difference]: Finished difference Result 92 states and 174 transitions. [2022-03-03 18:50:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:50:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:25,337 INFO L225 Difference]: With dead ends: 92 [2022-03-03 18:50:25,337 INFO L226 Difference]: Without dead ends: 92 [2022-03-03 18:50:25,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:50:25,338 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:25,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-03 18:50:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2022-03-03 18:50:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3207547169811322) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 123 transitions. [2022-03-03 18:50:25,346 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 123 transitions. Word has length 14 [2022-03-03 18:50:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:25,346 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 123 transitions. [2022-03-03 18:50:25,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 123 transitions. [2022-03-03 18:50:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:25,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:25,347 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:25,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-03 18:50:25,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 18:50:25,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 585799113, now seen corresponding path program 9 times [2022-03-03 18:50:25,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:25,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059841786] [2022-03-03 18:50:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:25,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059841786] [2022-03-03 18:50:25,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059841786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:25,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402739648] [2022-03-03 18:50:25,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:50:25,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:25,601 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) [2022-03-03 18:50:25,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 18:50:25,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:50:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:25,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402739648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:25,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:25,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:25,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472073123] [2022-03-03 18:50:25,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:25,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:25,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:25,678 INFO L87 Difference]: Start difference. First operand 54 states and 123 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:25,735 INFO L93 Difference]: Finished difference Result 65 states and 136 transitions. [2022-03-03 18:50:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:50:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:25,736 INFO L225 Difference]: With dead ends: 65 [2022-03-03 18:50:25,736 INFO L226 Difference]: Without dead ends: 63 [2022-03-03 18:50:25,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:50:25,737 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:25,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-03 18:50:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2022-03-03 18:50:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.30188679245283) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 122 transitions. [2022-03-03 18:50:25,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 122 transitions. Word has length 14 [2022-03-03 18:50:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:25,743 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 122 transitions. [2022-03-03 18:50:25,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 122 transitions. [2022-03-03 18:50:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:25,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:25,744 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:25,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 18:50:25,960 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1498364069, now seen corresponding path program 3 times [2022-03-03 18:50:25,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:25,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876947123] [2022-03-03 18:50:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:26,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876947123] [2022-03-03 18:50:26,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876947123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:26,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012085685] [2022-03-03 18:50:26,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:50:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:26,044 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) [2022-03-03 18:50:26,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 18:50:26,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:50:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012085685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:26,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:26,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:26,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719297831] [2022-03-03 18:50:26,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:26,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:26,141 INFO L87 Difference]: Start difference. First operand 54 states and 122 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:26,200 INFO L93 Difference]: Finished difference Result 101 states and 187 transitions. [2022-03-03 18:50:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 18:50:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:26,201 INFO L225 Difference]: With dead ends: 101 [2022-03-03 18:50:26,201 INFO L226 Difference]: Without dead ends: 101 [2022-03-03 18:50:26,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-03 18:50:26,202 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:26,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:50:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-03 18:50:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2022-03-03 18:50:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 115 transitions. [2022-03-03 18:50:26,206 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 115 transitions. Word has length 14 [2022-03-03 18:50:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:26,206 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 115 transitions. [2022-03-03 18:50:26,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 115 transitions. [2022-03-03 18:50:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:26,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:26,207 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:26,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 18:50:26,408 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -277813571, now seen corresponding path program 10 times [2022-03-03 18:50:26,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:26,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261853826] [2022-03-03 18:50:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261853826] [2022-03-03 18:50:26,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261853826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:26,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714134161] [2022-03-03 18:50:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:26,441 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) [2022-03-03 18:50:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 18:50:26,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714134161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:26,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:26,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:26,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5605238] [2022-03-03 18:50:26,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:26,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:26,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:26,512 INFO L87 Difference]: Start difference. First operand 52 states and 115 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:26,560 INFO L93 Difference]: Finished difference Result 65 states and 131 transitions. [2022-03-03 18:50:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:50:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:26,561 INFO L225 Difference]: With dead ends: 65 [2022-03-03 18:50:26,561 INFO L226 Difference]: Without dead ends: 61 [2022-03-03 18:50:26,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:50:26,562 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:26,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-03 18:50:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2022-03-03 18:50:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2022-03-03 18:50:26,565 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 14 [2022-03-03 18:50:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:26,565 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2022-03-03 18:50:26,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2022-03-03 18:50:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:26,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:26,566 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:26,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 18:50:26,776 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1379453883, now seen corresponding path program 4 times [2022-03-03 18:50:26,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:26,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498267396] [2022-03-03 18:50:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:26,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498267396] [2022-03-03 18:50:26,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498267396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:26,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912981897] [2022-03-03 18:50:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:50:26,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:26,814 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) [2022-03-03 18:50:26,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 18:50:26,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:50:26,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:26,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912981897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:26,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:26,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:26,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921926674] [2022-03-03 18:50:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:26,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:26,919 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:26,982 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2022-03-03 18:50:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:50:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:26,983 INFO L225 Difference]: With dead ends: 105 [2022-03-03 18:50:26,983 INFO L226 Difference]: Without dead ends: 105 [2022-03-03 18:50:26,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-03 18:50:26,984 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:26,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-03 18:50:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 53. [2022-03-03 18:50:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 118 transitions. [2022-03-03 18:50:26,987 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 118 transitions. Word has length 14 [2022-03-03 18:50:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:26,988 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 118 transitions. [2022-03-03 18:50:26,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 118 transitions. [2022-03-03 18:50:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:26,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:26,988 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:27,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:27,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:27,195 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1280002999, now seen corresponding path program 11 times [2022-03-03 18:50:27,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:27,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452479570] [2022-03-03 18:50:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:27,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452479570] [2022-03-03 18:50:27,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452479570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:27,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983133490] [2022-03-03 18:50:27,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:27,238 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) [2022-03-03 18:50:27,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 18:50:27,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:50:27,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983133490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:27,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:27,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:27,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066106703] [2022-03-03 18:50:27,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:27,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:27,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:27,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:27,324 INFO L87 Difference]: Start difference. First operand 53 states and 118 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:27,387 INFO L93 Difference]: Finished difference Result 68 states and 137 transitions. [2022-03-03 18:50:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 18:50:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:27,388 INFO L225 Difference]: With dead ends: 68 [2022-03-03 18:50:27,388 INFO L226 Difference]: Without dead ends: 62 [2022-03-03 18:50:27,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-03 18:50:27,389 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:27,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-03 18:50:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-03-03 18:50:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 117 transitions. [2022-03-03 18:50:27,392 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 117 transitions. Word has length 14 [2022-03-03 18:50:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 117 transitions. [2022-03-03 18:50:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 117 transitions. [2022-03-03 18:50:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:27,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:27,393 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:27,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-03 18:50:27,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 18:50:27,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1988205413, now seen corresponding path program 5 times [2022-03-03 18:50:27,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:27,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118336442] [2022-03-03 18:50:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:27,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118336442] [2022-03-03 18:50:27,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118336442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:27,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766678272] [2022-03-03 18:50:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:50:27,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:27,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:27,649 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) [2022-03-03 18:50:27,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 18:50:27,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:50:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 18:50:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:27,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766678272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:27,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:27,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-03 18:50:27,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602934410] [2022-03-03 18:50:27,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:27,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 18:50:27,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 18:50:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 18:50:27,744 INFO L87 Difference]: Start difference. First operand 53 states and 117 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:27,822 INFO L93 Difference]: Finished difference Result 102 states and 192 transitions. [2022-03-03 18:50:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 18:50:27,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-03 18:50:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:27,823 INFO L225 Difference]: With dead ends: 102 [2022-03-03 18:50:27,823 INFO L226 Difference]: Without dead ends: 102 [2022-03-03 18:50:27,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-03 18:50:27,824 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:27,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-03 18:50:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2022-03-03 18:50:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2022-03-03 18:50:27,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 14 [2022-03-03 18:50:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:27,827 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2022-03-03 18:50:27,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2022-03-03 18:50:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 18:50:27,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:27,827 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:27,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:28,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:28,044 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2011863101, now seen corresponding path program 12 times [2022-03-03 18:50:28,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:28,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328341672] [2022-03-03 18:50:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:28,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:28,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328341672] [2022-03-03 18:50:28,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328341672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:50:28,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:50:28,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 18:50:28,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986757671] [2022-03-03 18:50:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:50:28,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 18:50:28,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 18:50:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:50:28,088 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2022-03-03 18:50:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:28,111 INFO L93 Difference]: Finished difference Result 59 states and 121 transitions. [2022-03-03 18:50:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 18:50:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 [2022-03-03 18:50:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:28,111 INFO L225 Difference]: With dead ends: 59 [2022-03-03 18:50:28,111 INFO L226 Difference]: Without dead ends: 51 [2022-03-03 18:50:28,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 18:50:28,112 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:28,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:50:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-03 18:50:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-03 18:50:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 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) [2022-03-03 18:50:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2022-03-03 18:50:28,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2022-03-03 18:50:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:28,115 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2022-03-03 18:50:28,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2022-03-03 18:50:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2022-03-03 18:50:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:50:28,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:28,116 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-03 18:50:28,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -704131082, now seen corresponding path program 6 times [2022-03-03 18:50:28,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:28,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8327983] [2022-03-03 18:50:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:28,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:28,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:28,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8327983] [2022-03-03 18:50:28,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8327983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:28,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559484826] [2022-03-03 18:50:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:50:28,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:28,203 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) [2022-03-03 18:50:28,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 18:50:28,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:50:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:50:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:50:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:28,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:28,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:50:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:30,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:30,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:50:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:39,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559484826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:50:39,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:50:39,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-03 18:50:39,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746411476] [2022-03-03 18:50:39,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:50:39,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 18:50:39,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:50:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 18:50:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:50:39,642 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:50:39,990 INFO L93 Difference]: Finished difference Result 83 states and 176 transitions. [2022-03-03 18:50:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:50:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:50:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:50:39,991 INFO L225 Difference]: With dead ends: 83 [2022-03-03 18:50:39,992 INFO L226 Difference]: Without dead ends: 66 [2022-03-03 18:50:39,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:50:39,992 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:50:39,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 44 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:50:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-03 18:50:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2022-03-03 18:50:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2022-03-03 18:50:39,996 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2022-03-03 18:50:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:50:39,996 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2022-03-03 18:50:39,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:50:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2022-03-03 18:50:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:50:39,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:50:39,997 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:50:40,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 18:50:40,197 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 [2022-03-03 18:50:40,197 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:50:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:50:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash 947223332, now seen corresponding path program 7 times [2022-03-03 18:50:40,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:50:40,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406113609] [2022-03-03 18:50:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:50:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:50:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:40,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:50:40,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406113609] [2022-03-03 18:50:40,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406113609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:50:40,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138450602] [2022-03-03 18:50:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:50:40,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:50:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:50:40,315 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) [2022-03-03 18:50:40,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 18:50:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:50:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:50:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:50:40,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:40,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:50:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:50:43,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:50:44,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:50:44,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:51:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:11,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138450602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:11,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:11,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:51:11,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873981369] [2022-03-03 18:51:11,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:51:11,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:51:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:51:11,965 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:12,248 INFO L93 Difference]: Finished difference Result 93 states and 209 transitions. [2022-03-03 18:51:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:51:12,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:51:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:12,249 INFO L225 Difference]: With dead ends: 93 [2022-03-03 18:51:12,249 INFO L226 Difference]: Without dead ends: 83 [2022-03-03 18:51:12,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-03 18:51:12,250 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:12,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:51:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-03 18:51:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2022-03-03 18:51:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2022-03-03 18:51:12,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2022-03-03 18:51:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:12,253 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2022-03-03 18:51:12,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2022-03-03 18:51:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:51:12,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:12,254 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:12,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:12,454 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 [2022-03-03 18:51:12,455 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash -889435914, now seen corresponding path program 8 times [2022-03-03 18:51:12,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:12,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688307498] [2022-03-03 18:51:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:12,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:12,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:12,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688307498] [2022-03-03 18:51:12,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688307498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:12,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874162394] [2022-03-03 18:51:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:51:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:12,562 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) [2022-03-03 18:51:12,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 18:51:12,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:51:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:12,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:51:12,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:13,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:13,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:51:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:14,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:14,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:14,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:51:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:37,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874162394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:37,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:37,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-03 18:51:37,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362503858] [2022-03-03 18:51:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:37,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:51:37,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:51:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:51:37,213 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:37,417 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2022-03-03 18:51:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:51:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:51:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:37,417 INFO L225 Difference]: With dead ends: 93 [2022-03-03 18:51:37,417 INFO L226 Difference]: Without dead ends: 79 [2022-03-03 18:51:37,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:51:37,418 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:37,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:51:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-03 18:51:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-03-03 18:51:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2022-03-03 18:51:37,421 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2022-03-03 18:51:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2022-03-03 18:51:37,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2022-03-03 18:51:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:51:37,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:37,422 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:37,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 18:51:37,635 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 [2022-03-03 18:51:37,635 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 828313146, now seen corresponding path program 9 times [2022-03-03 18:51:37,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:37,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160956221] [2022-03-03 18:51:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:37,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:37,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160956221] [2022-03-03 18:51:37,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160956221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:37,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782040986] [2022-03-03 18:51:37,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:51:37,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:37,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:37,728 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) [2022-03-03 18:51:37,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 18:51:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:51:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:37,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 18:51:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:39,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:39,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:51:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:46,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:47,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:47,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:51:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:50,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782040986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:51:50,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:51:50,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:51:50,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169368260] [2022-03-03 18:51:50,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:51:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:51:50,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:51:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:51:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:51:50,323 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:51:50,604 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2022-03-03 18:51:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:51:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:51:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:51:50,608 INFO L225 Difference]: With dead ends: 119 [2022-03-03 18:51:50,608 INFO L226 Difference]: Without dead ends: 102 [2022-03-03 18:51:50,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:51:50,609 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:51:50,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:51:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-03 18:51:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2022-03-03 18:51:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2022-03-03 18:51:50,613 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2022-03-03 18:51:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:51:50,613 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2022-03-03 18:51:50,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:51:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2022-03-03 18:51:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:51:50,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:51:50,613 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:51:50,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 18:51:50,836 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 [2022-03-03 18:51:50,836 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:51:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:51:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1683619800, now seen corresponding path program 10 times [2022-03-03 18:51:50,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:51:50,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67585350] [2022-03-03 18:51:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:51:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:51:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:51:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:50,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:51:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67585350] [2022-03-03 18:51:50,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67585350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:51:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985810466] [2022-03-03 18:51:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:51:50,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:51:50,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:51:50,923 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) [2022-03-03 18:51:50,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 18:51:50,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:51:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:51:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:51:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:51:51,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:51,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:51:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:51:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:51:56,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:51:56,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:52:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:16,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985810466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:16,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:16,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:52:16,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289732571] [2022-03-03 18:52:16,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:16,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:52:16,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:52:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:52:16,211 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:16,651 INFO L93 Difference]: Finished difference Result 148 states and 316 transitions. [2022-03-03 18:52:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 18:52:16,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:52:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:16,652 INFO L225 Difference]: With dead ends: 148 [2022-03-03 18:52:16,652 INFO L226 Difference]: Without dead ends: 131 [2022-03-03 18:52:16,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:52:16,653 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:16,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 99 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:52:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-03 18:52:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 68. [2022-03-03 18:52:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 67 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2022-03-03 18:52:16,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 15 [2022-03-03 18:52:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2022-03-03 18:52:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2022-03-03 18:52:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:52:16,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:16,658 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:16,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:16,873 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 [2022-03-03 18:52:16,874 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash -280684384, now seen corresponding path program 11 times [2022-03-03 18:52:16,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:16,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688225884] [2022-03-03 18:52:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:16,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:16,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688225884] [2022-03-03 18:52:16,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688225884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:16,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750656661] [2022-03-03 18:52:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:52:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:16,972 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) [2022-03-03 18:52:16,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 18:52:17,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:52:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:52:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:17,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:52:17,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:52:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:18,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:19,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:52:19,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:52:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:25,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750656661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:52:25,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:52:25,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-03 18:52:25,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473353239] [2022-03-03 18:52:25,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:52:25,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:52:25,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:52:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:52:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:52:25,599 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:52:25,840 INFO L93 Difference]: Finished difference Result 101 states and 241 transitions. [2022-03-03 18:52:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:52:25,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:52:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:52:25,841 INFO L225 Difference]: With dead ends: 101 [2022-03-03 18:52:25,841 INFO L226 Difference]: Without dead ends: 87 [2022-03-03 18:52:25,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:52:25,842 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:52:25,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 36 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:52:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-03 18:52:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2022-03-03 18:52:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6315789473684212) internal successors, (200), 76 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 200 transitions. [2022-03-03 18:52:25,845 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 200 transitions. Word has length 15 [2022-03-03 18:52:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:52:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 200 transitions. [2022-03-03 18:52:25,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:52:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 200 transitions. [2022-03-03 18:52:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:52:25,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:52:25,846 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:52:25,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 18:52:26,051 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 [2022-03-03 18:52:26,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:52:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:52:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1437064676, now seen corresponding path program 12 times [2022-03-03 18:52:26,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:52:26,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86469740] [2022-03-03 18:52:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:52:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:52:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:52:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:26,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:52:26,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86469740] [2022-03-03 18:52:26,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86469740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:52:26,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295559718] [2022-03-03 18:52:26,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:52:26,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:52:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:52:26,163 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) [2022-03-03 18:52:26,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 18:52:26,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:52:26,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:52:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:52:26,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:52:26,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:52:26,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:52:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:52:37,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:52:38,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:52:38,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:53:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:06,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295559718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:06,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:06,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:53:06,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166683871] [2022-03-03 18:53:06,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:06,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:53:06,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:53:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:53:06,691 INFO L87 Difference]: Start difference. First operand 77 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:06,977 INFO L93 Difference]: Finished difference Result 121 states and 284 transitions. [2022-03-03 18:53:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 18:53:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:53:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:06,978 INFO L225 Difference]: With dead ends: 121 [2022-03-03 18:53:06,978 INFO L226 Difference]: Without dead ends: 111 [2022-03-03 18:53:06,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-03-03 18:53:06,979 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:06,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 67 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:53:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-03 18:53:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2022-03-03 18:53:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6315789473684212) internal successors, (200), 76 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 200 transitions. [2022-03-03 18:53:06,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 200 transitions. Word has length 15 [2022-03-03 18:53:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:06,983 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 200 transitions. [2022-03-03 18:53:06,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 200 transitions. [2022-03-03 18:53:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:53:06,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:06,983 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:07,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:07,184 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 [2022-03-03 18:53:07,184 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2002595966, now seen corresponding path program 13 times [2022-03-03 18:53:07,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:07,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654950331] [2022-03-03 18:53:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:07,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:07,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654950331] [2022-03-03 18:53:07,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654950331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:07,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978932422] [2022-03-03 18:53:07,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:53:07,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:07,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:07,293 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) [2022-03-03 18:53:07,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 18:53:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:53:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:22,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:53:22,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:53:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:24,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:25,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:53:25,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:53:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:36,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978932422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:53:36,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:53:36,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:53:36,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171402920] [2022-03-03 18:53:36,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:53:36,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:53:36,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:53:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:53:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:53:36,004 INFO L87 Difference]: Start difference. First operand 77 states and 200 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:53:36,518 INFO L93 Difference]: Finished difference Result 172 states and 371 transitions. [2022-03-03 18:53:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 18:53:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:53:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:53:36,520 INFO L225 Difference]: With dead ends: 172 [2022-03-03 18:53:36,520 INFO L226 Difference]: Without dead ends: 141 [2022-03-03 18:53:36,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 18:53:36,521 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:53:36,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 103 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:53:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-03 18:53:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 77. [2022-03-03 18:53:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2022-03-03 18:53:36,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 15 [2022-03-03 18:53:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:53:36,525 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2022-03-03 18:53:36,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:53:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2022-03-03 18:53:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:53:36,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:53:36,526 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:53:36,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 18:53:36,744 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 [2022-03-03 18:53:36,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:53:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:53:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1257893468, now seen corresponding path program 14 times [2022-03-03 18:53:36,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:53:36,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865316200] [2022-03-03 18:53:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:53:36,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:53:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:53:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:36,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:53:36,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865316200] [2022-03-03 18:53:36,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865316200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:53:36,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755495829] [2022-03-03 18:53:36,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:53:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:53:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:53:36,824 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) [2022-03-03 18:53:36,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 18:53:36,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:53:36,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:53:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:53:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:53:38,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:53:38,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:53:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:53:43,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:53:44,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:53:44,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:54:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:04,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755495829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:54:04,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:54:04,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 18:54:04,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385937210] [2022-03-03 18:54:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:54:04,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:54:04,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:54:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:54:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:54:04,367 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:54:04,635 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2022-03-03 18:54:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:54:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:54:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:54:04,636 INFO L225 Difference]: With dead ends: 120 [2022-03-03 18:54:04,636 INFO L226 Difference]: Without dead ends: 115 [2022-03-03 18:54:04,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:54:04,637 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:54:04,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:54:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-03 18:54:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-03-03 18:54:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2022-03-03 18:54:04,640 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 15 [2022-03-03 18:54:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:54:04,641 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2022-03-03 18:54:04,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2022-03-03 18:54:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:54:04,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:54:04,641 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:54:04,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 18:54:04,855 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 [2022-03-03 18:54:04,855 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:54:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:54:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1410743862, now seen corresponding path program 15 times [2022-03-03 18:54:04,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:54:04,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234124158] [2022-03-03 18:54:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:54:04,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:54:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:54:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:04,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:54:04,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234124158] [2022-03-03 18:54:04,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234124158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:54:04,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854887491] [2022-03-03 18:54:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:54:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:54:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:54:04,954 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) [2022-03-03 18:54:04,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 18:54:04,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 18:54:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:54:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:54:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:54:05,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:54:05,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:54:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:05,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:54:06,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:54:06,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:54:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:21,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854887491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:54:21,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:54:21,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-03 18:54:21,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873985363] [2022-03-03 18:54:21,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:54:21,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:54:21,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:54:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:54:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:54:21,931 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:54:22,205 INFO L93 Difference]: Finished difference Result 108 states and 267 transitions. [2022-03-03 18:54:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:54:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:54:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:54:22,208 INFO L225 Difference]: With dead ends: 108 [2022-03-03 18:54:22,208 INFO L226 Difference]: Without dead ends: 94 [2022-03-03 18:54:22,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:54:22,209 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:54:22,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:54:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-03 18:54:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-03-03 18:54:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.6941176470588237) internal successors, (229), 85 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 229 transitions. [2022-03-03 18:54:22,213 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 229 transitions. Word has length 15 [2022-03-03 18:54:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:54:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 229 transitions. [2022-03-03 18:54:22,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:54:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 229 transitions. [2022-03-03 18:54:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:54:22,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:54:22,214 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:54:22,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 18:54:22,423 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 [2022-03-03 18:54:22,423 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:54:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:54:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1166474374, now seen corresponding path program 16 times [2022-03-03 18:54:22,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:54:22,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948671327] [2022-03-03 18:54:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:54:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:54:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:54:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:22,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:54:22,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948671327] [2022-03-03 18:54:22,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948671327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:54:22,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716359429] [2022-03-03 18:54:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:54:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:54:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:54:22,502 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) [2022-03-03 18:54:22,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 18:54:22,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:54:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:54:22,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:54:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:54:22,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:54:22,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:54:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:54:32,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:54:32,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:54:32,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:55:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:05,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716359429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:55:05,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:55:05,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:55:05,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824816751] [2022-03-03 18:55:05,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:55:05,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:55:05,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:55:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:55:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:55:05,829 INFO L87 Difference]: Start difference. First operand 86 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:55:06,182 INFO L93 Difference]: Finished difference Result 131 states and 318 transitions. [2022-03-03 18:55:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 18:55:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:55:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:55:06,183 INFO L225 Difference]: With dead ends: 131 [2022-03-03 18:55:06,183 INFO L226 Difference]: Without dead ends: 121 [2022-03-03 18:55:06,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-03 18:55:06,184 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:55:06,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 92 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:55:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-03 18:55:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2022-03-03 18:55:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.6941176470588237) internal successors, (229), 85 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 229 transitions. [2022-03-03 18:55:06,187 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 229 transitions. Word has length 15 [2022-03-03 18:55:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:55:06,187 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 229 transitions. [2022-03-03 18:55:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 229 transitions. [2022-03-03 18:55:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:55:06,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:55:06,188 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:55:06,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 18:55:06,395 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 [2022-03-03 18:55:06,396 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:55:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:55:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash -311167720, now seen corresponding path program 17 times [2022-03-03 18:55:06,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:55:06,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375283565] [2022-03-03 18:55:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:55:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:55:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:55:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:06,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:55:06,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375283565] [2022-03-03 18:55:06,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375283565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:55:06,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13033159] [2022-03-03 18:55:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:55:06,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:55:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:55:06,496 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) [2022-03-03 18:55:06,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 18:55:06,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 18:55:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:55:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:55:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:55:14,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:14,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:55:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:17,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:55:17,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:17,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:55:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:23,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13033159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:55:23,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:55:23,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:55:23,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874602985] [2022-03-03 18:55:23,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:55:23,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:55:23,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:55:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:55:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:55:23,023 INFO L87 Difference]: Start difference. First operand 86 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:55:23,559 INFO L93 Difference]: Finished difference Result 183 states and 404 transitions. [2022-03-03 18:55:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 18:55:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:55:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:55:23,560 INFO L225 Difference]: With dead ends: 183 [2022-03-03 18:55:23,560 INFO L226 Difference]: Without dead ends: 159 [2022-03-03 18:55:23,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 18:55:23,561 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:55:23,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 130 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:55:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-03 18:55:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 88. [2022-03-03 18:55:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.67816091954023) internal successors, (233), 87 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 233 transitions. [2022-03-03 18:55:23,565 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 233 transitions. Word has length 15 [2022-03-03 18:55:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:55:23,565 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 233 transitions. [2022-03-03 18:55:23,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 233 transitions. [2022-03-03 18:55:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:55:23,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:55:23,566 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:55:23,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 18:55:23,771 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 [2022-03-03 18:55:23,771 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:55:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:55:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 433534778, now seen corresponding path program 18 times [2022-03-03 18:55:23,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:55:23,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052380849] [2022-03-03 18:55:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:55:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:55:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:55:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:23,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:55:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052380849] [2022-03-03 18:55:23,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052380849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:55:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746434513] [2022-03-03 18:55:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:55:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:55:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:55:23,862 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) [2022-03-03 18:55:23,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 18:55:23,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:55:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:55:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:55:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:55:24,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:24,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:55:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:55:27,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:27,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:55:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:49,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746434513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:55:49,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:55:49,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 18:55:49,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325488213] [2022-03-03 18:55:49,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:55:49,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:55:49,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:55:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:55:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:55:49,343 INFO L87 Difference]: Start difference. First operand 88 states and 233 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:55:49,645 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2022-03-03 18:55:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 18:55:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:55:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:55:49,646 INFO L225 Difference]: With dead ends: 127 [2022-03-03 18:55:49,646 INFO L226 Difference]: Without dead ends: 122 [2022-03-03 18:55:49,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:55:49,647 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:55:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:55:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-03 18:55:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2022-03-03 18:55:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.67816091954023) internal successors, (233), 87 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 233 transitions. [2022-03-03 18:55:49,651 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 233 transitions. Word has length 15 [2022-03-03 18:55:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:55:49,651 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 233 transitions. [2022-03-03 18:55:49,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 233 transitions. [2022-03-03 18:55:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:55:49,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:55:49,651 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:55:49,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 18:55:49,866 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 [2022-03-03 18:55:49,866 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:55:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:55:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2044475736, now seen corresponding path program 19 times [2022-03-03 18:55:49,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:55:49,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378041151] [2022-03-03 18:55:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:55:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:55:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:55:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:49,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:55:49,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378041151] [2022-03-03 18:55:49,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378041151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:55:49,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641533541] [2022-03-03 18:55:49,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:55:49,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:55:49,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:55:49,952 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) [2022-03-03 18:55:49,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 18:55:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:55:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:55:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:55:50,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:50,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:55:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:52,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:55:53,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:53,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:55:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:57,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641533541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:55:57,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:55:57,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-03 18:55:57,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402542156] [2022-03-03 18:55:57,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:55:57,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:55:57,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:55:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:55:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:55:57,496 INFO L87 Difference]: Start difference. First operand 88 states and 233 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:55:57,822 INFO L93 Difference]: Finished difference Result 128 states and 315 transitions. [2022-03-03 18:55:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:55:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:55:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:55:57,823 INFO L225 Difference]: With dead ends: 128 [2022-03-03 18:55:57,823 INFO L226 Difference]: Without dead ends: 123 [2022-03-03 18:55:57,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:55:57,824 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:55:57,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 77 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:55:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-03 18:55:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2022-03-03 18:55:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.67816091954023) internal successors, (233), 87 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 233 transitions. [2022-03-03 18:55:57,828 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 233 transitions. Word has length 15 [2022-03-03 18:55:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:55:57,828 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 233 transitions. [2022-03-03 18:55:57,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:55:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 233 transitions. [2022-03-03 18:55:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:55:57,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:55:57,829 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:55:57,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 18:55:58,047 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 [2022-03-03 18:55:58,048 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:55:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:55:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1989555360, now seen corresponding path program 20 times [2022-03-03 18:55:58,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:55:58,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319383159] [2022-03-03 18:55:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:55:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:55:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:55:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:55:58,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:55:58,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319383159] [2022-03-03 18:55:58,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319383159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:55:58,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53496356] [2022-03-03 18:55:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:55:58,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:55:58,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:55:58,156 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) [2022-03-03 18:55:58,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 18:55:58,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:55:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:55:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:55:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:55:58,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:55:58,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:56:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:56:00,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:56:00,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:56:00,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:56:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:56:36,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53496356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:56:36,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:56:36,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-03 18:56:36,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407246716] [2022-03-03 18:56:36,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:56:36,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 18:56:36,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:56:36,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 18:56:36,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 18:56:36,992 INFO L87 Difference]: Start difference. First operand 88 states and 233 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:56:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:56:37,201 INFO L93 Difference]: Finished difference Result 120 states and 305 transitions. [2022-03-03 18:56:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:56:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:56:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:56:37,202 INFO L225 Difference]: With dead ends: 120 [2022-03-03 18:56:37,202 INFO L226 Difference]: Without dead ends: 106 [2022-03-03 18:56:37,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 18:56:37,203 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:56:37,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:56:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-03 18:56:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2022-03-03 18:56:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.75) internal successors, (264), 96 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:56:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 264 transitions. [2022-03-03 18:56:37,206 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 264 transitions. Word has length 15 [2022-03-03 18:56:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:56:37,206 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 264 transitions. [2022-03-03 18:56:37,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:56:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 264 transitions. [2022-03-03 18:56:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:56:37,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:56:37,207 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:56:37,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 18:56:37,415 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 [2022-03-03 18:56:37,416 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:56:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:56:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -271806300, now seen corresponding path program 21 times [2022-03-03 18:56:37,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:56:37,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838503825] [2022-03-03 18:56:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:56:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:56:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:56:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:56:37,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:56:37,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838503825] [2022-03-03 18:56:37,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838503825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:56:37,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479546198] [2022-03-03 18:56:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 18:56:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:56:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:56:37,496 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) [2022-03-03 18:56:37,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 18:56:37,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 18:56:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:56:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:56:37,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:56:39,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:56:39,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 240 [2022-03-03 18:56:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:56:44,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:56:45,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:56:45,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:57:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:57:17,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479546198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:57:17,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:57:17,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:57:17,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346377478] [2022-03-03 18:57:17,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:57:17,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:57:17,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:57:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:57:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:57:17,238 INFO L87 Difference]: Start difference. First operand 97 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:57:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:57:17,501 INFO L93 Difference]: Finished difference Result 144 states and 361 transitions. [2022-03-03 18:57:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 18:57:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:57:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:57:17,502 INFO L225 Difference]: With dead ends: 144 [2022-03-03 18:57:17,502 INFO L226 Difference]: Without dead ends: 134 [2022-03-03 18:57:17,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-03 18:57:17,502 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:57:17,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 52 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:57:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-03 18:57:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2022-03-03 18:57:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.75) internal successors, (264), 96 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:57:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 264 transitions. [2022-03-03 18:57:17,506 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 264 transitions. Word has length 15 [2022-03-03 18:57:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:57:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 264 transitions. [2022-03-03 18:57:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:57:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 264 transitions. [2022-03-03 18:57:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:57:17,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:57:17,507 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:57:17,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 18:57:17,723 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 [2022-03-03 18:57:17,723 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:57:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:57:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 583500354, now seen corresponding path program 22 times [2022-03-03 18:57:17,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:57:17,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584357985] [2022-03-03 18:57:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:57:17,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:57:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:57:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:57:17,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:57:17,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584357985] [2022-03-03 18:57:17,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584357985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:57:17,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484237706] [2022-03-03 18:57:17,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 18:57:17,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:57:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:57:17,830 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) [2022-03-03 18:57:17,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 18:57:17,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 18:57:17,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:57:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:57:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:57:35,731 WARN L228 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 1582 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-03 18:58:12,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:12,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:58:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:14,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:14,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:14,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:58:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:26,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484237706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:58:26,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:58:26,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 18:58:26,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418045614] [2022-03-03 18:58:26,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:58:26,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 18:58:26,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:58:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 18:58:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 18:58:26,107 INFO L87 Difference]: Start difference. First operand 97 states and 264 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:58:26,692 INFO L93 Difference]: Finished difference Result 194 states and 439 transitions. [2022-03-03 18:58:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 18:58:26,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:58:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:58:26,693 INFO L225 Difference]: With dead ends: 194 [2022-03-03 18:58:26,693 INFO L226 Difference]: Without dead ends: 170 [2022-03-03 18:58:26,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 18:58:26,694 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 18:58:26,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 108 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 18:58:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-03 18:58:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 97. [2022-03-03 18:58:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.7395833333333335) internal successors, (263), 96 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 263 transitions. [2022-03-03 18:58:26,697 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 263 transitions. Word has length 15 [2022-03-03 18:58:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:58:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 263 transitions. [2022-03-03 18:58:26,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:58:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 263 transitions. [2022-03-03 18:58:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:58:26,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:58:26,698 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:58:26,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 18:58:26,922 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 [2022-03-03 18:58:26,922 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:58:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:58:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1328202852, now seen corresponding path program 23 times [2022-03-03 18:58:26,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:58:26,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828361091] [2022-03-03 18:58:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:58:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:58:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:58:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:27,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:58:27,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828361091] [2022-03-03 18:58:27,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828361091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:58:27,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998612307] [2022-03-03 18:58:27,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 18:58:27,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:58:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:58:27,004 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) [2022-03-03 18:58:27,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 18:58:27,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 18:58:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:58:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:58:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:58:29,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:29,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:58:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:58:34,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:58:35,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:58:35,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:59:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:06,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998612307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:06,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:06,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 18:59:06,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527769729] [2022-03-03 18:59:06,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 18:59:06,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 18:59:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 18:59:06,924 INFO L87 Difference]: Start difference. First operand 97 states and 263 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:07,226 INFO L93 Difference]: Finished difference Result 143 states and 358 transitions. [2022-03-03 18:59:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 18:59:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:59:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:07,228 INFO L225 Difference]: With dead ends: 143 [2022-03-03 18:59:07,228 INFO L226 Difference]: Without dead ends: 138 [2022-03-03 18:59:07,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:59:07,229 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:07,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:59:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-03 18:59:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2022-03-03 18:59:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.7395833333333335) internal successors, (263), 96 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 263 transitions. [2022-03-03 18:59:07,232 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 263 transitions. Word has length 15 [2022-03-03 18:59:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:07,232 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 263 transitions. [2022-03-03 18:59:07,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 263 transitions. [2022-03-03 18:59:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:59:07,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:07,233 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:07,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:07,447 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 [2022-03-03 18:59:07,447 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:59:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1355823486, now seen corresponding path program 24 times [2022-03-03 18:59:07,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:07,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505138386] [2022-03-03 18:59:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:07,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:07,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505138386] [2022-03-03 18:59:07,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505138386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:07,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712436085] [2022-03-03 18:59:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 18:59:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:07,528 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) [2022-03-03 18:59:07,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 18:59:07,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 18:59:07,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:59:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:07,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:07,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:59:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:09,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:10,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:10,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:59:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:17,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712436085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:17,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:17,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-03 18:59:17,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337852351] [2022-03-03 18:59:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:17,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 18:59:17,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 18:59:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-03 18:59:17,252 INFO L87 Difference]: Start difference. First operand 97 states and 263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:17,577 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2022-03-03 18:59:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 18:59:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:59:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:17,578 INFO L225 Difference]: With dead ends: 154 [2022-03-03 18:59:17,578 INFO L226 Difference]: Without dead ends: 149 [2022-03-03 18:59:17,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-03 18:59:17,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:17,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 18:59:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-03 18:59:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 97. [2022-03-03 18:59:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.7395833333333335) internal successors, (263), 96 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 263 transitions. [2022-03-03 18:59:17,582 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 263 transitions. Word has length 15 [2022-03-03 18:59:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:17,582 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 263 transitions. [2022-03-03 18:59:17,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 263 transitions. [2022-03-03 18:59:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 18:59:17,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:17,582 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:17,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 18:59:17,787 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 [2022-03-03 18:59:17,787 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:59:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1338705956, now seen corresponding path program 25 times [2022-03-03 18:59:17,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:17,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162270230] [2022-03-03 18:59:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:17,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:17,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162270230] [2022-03-03 18:59:17,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162270230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:17,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445528816] [2022-03-03 18:59:17,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 18:59:17,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:17,897 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) [2022-03-03 18:59:17,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 18:59:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 18:59:17,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:18,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:18,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 215 [2022-03-03 18:59:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:21,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:21,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:21,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-03-03 18:59:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:38,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445528816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 18:59:38,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 18:59:38,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-03 18:59:38,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061508675] [2022-03-03 18:59:38,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 18:59:38,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 18:59:38,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:59:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 18:59:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-03 18:59:38,848 INFO L87 Difference]: Start difference. First operand 97 states and 263 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:59:39,217 INFO L93 Difference]: Finished difference Result 162 states and 404 transitions. [2022-03-03 18:59:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 18:59:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 18:59:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:59:39,218 INFO L225 Difference]: With dead ends: 162 [2022-03-03 18:59:39,218 INFO L226 Difference]: Without dead ends: 157 [2022-03-03 18:59:39,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-03-03 18:59:39,219 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 18:59:39,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 18:59:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-03 18:59:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 99. [2022-03-03 18:59:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7142857142857144) internal successors, (266), 98 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 266 transitions. [2022-03-03 18:59:39,222 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 266 transitions. Word has length 15 [2022-03-03 18:59:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:59:39,222 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 266 transitions. [2022-03-03 18:59:39,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 18:59:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 266 transitions. [2022-03-03 18:59:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 18:59:39,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:59:39,223 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:59:39,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 18:59:39,423 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 [2022-03-03 18:59:39,424 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:59:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:59:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1974729243, now seen corresponding path program 26 times [2022-03-03 18:59:39,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:59:39,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790529271] [2022-03-03 18:59:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:59:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:59:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:59:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:39,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:59:39,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790529271] [2022-03-03 18:59:39,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790529271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 18:59:39,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207745356] [2022-03-03 18:59:39,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 18:59:39,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 18:59:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:59:39,541 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) [2022-03-03 18:59:39,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 18:59:39,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 18:59:39,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 18:59:39,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 18:59:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 18:59:39,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 18:59:39,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-03-03 18:59:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:59:40,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 18:59:41,102 INFO L353 Elim1Store]: treesize reduction 25, result has 93.1 percent of original size [2022-03-03 18:59:41,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 23 treesize of output 371 [2022-03-03 19:00:23,678 INFO L353 Elim1Store]: treesize reduction 25, result has 94.3 percent of original size [2022-03-03 19:00:23,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 20 new quantified variables, introduced 55 case distinctions, treesize of input 25 treesize of output 455 [2022-03-03 19:01:23,644 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-03-03 19:01:23,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-03-03 19:01:45,276 INFO L353 Elim1Store]: treesize reduction 25, result has 95.3 percent of original size [2022-03-03 19:01:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 22 new quantified variables, introduced 66 case distinctions, treesize of input 27 treesize of output 547 Received shutdown request... [2022-03-03 19:02:17,497 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 19:02:17,499 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 19:02:17,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:02:17,522 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:02:17,522 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 [2022-03-03 19:02:17,699 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 [2022-03-03 19:02:17,700 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. [2022-03-03 19:02:17,701 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 19:02:17,701 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 19:02:17,704 INFO L732 BasicCegarLoop]: Path program histogram: [26, 12, 2, 1] [2022-03-03 19:02:17,706 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:02:17,706 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:02:17,708 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:02:17 BasicIcfg [2022-03-03 19:02:17,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:02:17,708 INFO L158 Benchmark]: Toolchain (without parser) took 801355.86ms. Allocated memory was 183.5MB in the beginning and 950.0MB in the end (delta: 766.5MB). Free memory was 147.7MB in the beginning and 428.9MB in the end (delta: -281.1MB). Peak memory consumption was 584.4MB. Max. memory is 8.0GB. [2022-03-03 19:02:17,708 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 183.5MB. Free memory is still 149.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:02:17,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.38ms. Allocated memory is still 183.5MB. Free memory was 147.7MB in the beginning and 146.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:02:17,709 INFO L158 Benchmark]: Boogie Preprocessor took 14.16ms. Allocated memory is still 183.5MB. Free memory was 146.2MB in the beginning and 145.3MB in the end (delta: 880.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:02:17,709 INFO L158 Benchmark]: RCFGBuilder took 268.86ms. Allocated memory is still 183.5MB. Free memory was 145.0MB in the beginning and 133.3MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-03 19:02:17,709 INFO L158 Benchmark]: TraceAbstraction took 801045.71ms. Allocated memory was 183.5MB in the beginning and 950.0MB in the end (delta: 766.5MB). Free memory was 132.9MB in the beginning and 428.9MB in the end (delta: -296.0MB). Peak memory consumption was 569.7MB. Max. memory is 8.0GB. [2022-03-03 19:02:17,709 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 0.12ms. Allocated memory is still 183.5MB. Free memory is still 149.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.38ms. Allocated memory is still 183.5MB. Free memory was 147.7MB in the beginning and 146.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.16ms. Allocated memory is still 183.5MB. Free memory was 146.2MB in the beginning and 145.3MB in the end (delta: 880.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 268.86ms. Allocated memory is still 183.5MB. Free memory was 145.0MB in the beginning and 133.3MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 801045.71ms. Allocated memory was 183.5MB in the beginning and 950.0MB in the end (delta: 766.5MB). Free memory was 132.9MB in the beginning and 428.9MB in the end (delta: -296.0MB). Peak memory consumption was 569.7MB. 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 17 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 20ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 801.0s, OverallIterations: 41, TraceHistogramMax: 5, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1329 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1329 mSDsluCounter, 2026 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4355 mSDsCounter, 929 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10816 IncrementalHoareTripleChecker+Invalid, 11745 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 929 mSolverCounterUnsat, 299 mSDtfsCounter, 10816 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1436 GetRequests, 656 SyntacticMatches, 41 SemanticMatches, 739 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=40, InterpolantAutomatonStates: 532, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 40 MinimizatonAttempts, 1170 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 623.9s InterpolantComputationTime, 1058 NumberOfCodeBlocks, 1058 NumberOfCodeBlocksAsserted, 115 NumberOfCheckSat, 1452 ConstructedInterpolants, 0 QuantifiedInterpolants, 15628 SizeOfPredicates, 145 NumberOfNonLiveVariables, 1846 ConjunctsInSsa, 701 ConjunctsInUnsatCore, 112 InterpolantComputations, 4 PerfectInterpolantSequences, 100/937 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