/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:57:36,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:57:36,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:57:37,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:57:37,054 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 [2022-03-15 16:57:37,090 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:57:37,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:57:37,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:57:37,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:57:37,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:57:37,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:57:37,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:57:37,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:57:37,093 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:57:37,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:57:37,094 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:57:37,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:57:37,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:57:37,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:57:37,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:57:37,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:57:37,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:57:37,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:57:37,097 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:57:37,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:57:37,098 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:57:37,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:57:37,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:57:37,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:57:37,377 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:57:37,378 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:57:37,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2022-03-15 16:57:37,380 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2022-03-15 16:57:37,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:57:37,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:57:37,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:57:37,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:57:37,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:57:37,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,433 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:57:37,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:57:37,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:57:37,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:57:37,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:57:37,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:57:37,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:57:37,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:57:37,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:57:37,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/1) ... [2022-03-15 16:57:37,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:57:37,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:37,493 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) [2022-03-15 16:57:37,503 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 [2022-03-15 16:57:37,533 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:57:37,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:57:37,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:57:37,534 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:57:37,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:57:37,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:57:37,534 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:57:37,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:57:37,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:57:37,535 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:57:37,583 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:57:37,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:57:37,670 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:57:37,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:57:37,684 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:57:37,686 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:57:37 BoogieIcfgContainer [2022-03-15 16:57:37,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:57:37,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:57:37,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:57:37,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:57:37,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:37" (1/2) ... [2022-03-15 16:57:37,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57da1ed3 and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:57:37, skipping insertion in model container [2022-03-15 16:57:37,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:57:37" (2/2) ... [2022-03-15 16:57:37,715 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2022-03-15 16:57:37,719 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:57:37,720 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:57:37,720 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:57:37,720 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:57:37,759 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:57:37,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:57:37,837 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 [2022-03-15 16:57:37,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:57:37,860 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2022-03-15 16:57:37,906 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:57:37,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:37,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:37,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1778097953, now seen corresponding path program 1 times [2022-03-15 16:57:37,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:37,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381186310] [2022-03-15 16:57:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:38,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:38,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381186310] [2022-03-15 16:57:38,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381186310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:57:38,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:57:38,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:57:38,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736418585] [2022-03-15 16:57:38,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:57:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:57:38,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:57:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:57:38,178 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:38,246 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2022-03-15 16:57:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:57:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:57:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:38,257 INFO L225 Difference]: With dead ends: 114 [2022-03-15 16:57:38,257 INFO L226 Difference]: Without dead ends: 114 [2022-03-15 16:57:38,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:57:38,262 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:38,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:57:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-15 16:57:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-03-15 16:57:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2022-03-15 16:57:38,347 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2022-03-15 16:57:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:38,348 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2022-03-15 16:57:38,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2022-03-15 16:57:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:38,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:38,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:38,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:57:38,354 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash -327311045, now seen corresponding path program 1 times [2022-03-15 16:57:38,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:38,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162646312] [2022-03-15 16:57:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:38,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:38,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162646312] [2022-03-15 16:57:38,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162646312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:38,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252466390] [2022-03-15 16:57:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:38,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:38,837 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) [2022-03-15 16:57:38,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:57:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:39,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:39,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252466390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:39,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:39,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:57:39,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227563440] [2022-03-15 16:57:39,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:39,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:57:39,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:57:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:57:39,750 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:40,536 INFO L93 Difference]: Finished difference Result 299 states and 565 transitions. [2022-03-15 16:57:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:57:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:40,540 INFO L225 Difference]: With dead ends: 299 [2022-03-15 16:57:40,540 INFO L226 Difference]: Without dead ends: 292 [2022-03-15 16:57:40,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:57:40,542 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:40,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-15 16:57:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 153. [2022-03-15 16:57:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2022-03-15 16:57:40,559 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2022-03-15 16:57:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:40,559 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2022-03-15 16:57:40,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2022-03-15 16:57:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:40,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:40,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:40,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:40,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:40,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -411096687, now seen corresponding path program 2 times [2022-03-15 16:57:40,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:40,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764467122] [2022-03-15 16:57:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:40,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:41,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:41,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764467122] [2022-03-15 16:57:41,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764467122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:41,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397600769] [2022-03-15 16:57:41,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:41,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:41,006 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) [2022-03-15 16:57:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:57:41,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:57:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:41,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:41,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397600769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:41,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:41,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 16:57:41,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520373806] [2022-03-15 16:57:41,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:41,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:57:41,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:57:41,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:57:41,647 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:42,459 INFO L93 Difference]: Finished difference Result 275 states and 526 transitions. [2022-03-15 16:57:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:57:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:42,462 INFO L225 Difference]: With dead ends: 275 [2022-03-15 16:57:42,462 INFO L226 Difference]: Without dead ends: 264 [2022-03-15 16:57:42,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:57:42,464 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:42,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 229 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-15 16:57:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 157. [2022-03-15 16:57:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2022-03-15 16:57:42,476 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2022-03-15 16:57:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:42,476 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2022-03-15 16:57:42,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2022-03-15 16:57:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:42,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:42,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:42,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:42,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 16:57:42,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash 470969037, now seen corresponding path program 3 times [2022-03-15 16:57:42,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:42,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715294886] [2022-03-15 16:57:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:42,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:42,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715294886] [2022-03-15 16:57:42,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715294886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:42,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134826820] [2022-03-15 16:57:42,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:42,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:42,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:42,920 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) [2022-03-15 16:57:42,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:57:42,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:57:42,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:43,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:43,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134826820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:43,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:43,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-15 16:57:43,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315809642] [2022-03-15 16:57:43,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:43,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:57:43,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:57:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:57:43,519 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:44,283 INFO L93 Difference]: Finished difference Result 232 states and 449 transitions. [2022-03-15 16:57:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:57:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:44,285 INFO L225 Difference]: With dead ends: 232 [2022-03-15 16:57:44,285 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 16:57:44,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:57:44,286 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:44,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 146 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 16:57:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 155. [2022-03-15 16:57:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2022-03-15 16:57:44,295 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2022-03-15 16:57:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2022-03-15 16:57:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2022-03-15 16:57:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:44,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:44,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:44,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:44,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:44,516 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1099615469, now seen corresponding path program 4 times [2022-03-15 16:57:44,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:44,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317089917] [2022-03-15 16:57:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:44,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317089917] [2022-03-15 16:57:44,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317089917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:57:44,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:57:44,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:57:44,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176210998] [2022-03-15 16:57:44,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:57:44,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:57:44,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:57:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:57:44,541 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-15 16:57:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:44,550 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2022-03-15 16:57:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:57:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:44,551 INFO L225 Difference]: With dead ends: 157 [2022-03-15 16:57:44,551 INFO L226 Difference]: Without dead ends: 157 [2022-03-15 16:57:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:57:44,552 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:57:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-15 16:57:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-15 16:57:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2022-03-15 16:57:44,561 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2022-03-15 16:57:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:44,562 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2022-03-15 16:57:44,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 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) [2022-03-15 16:57:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2022-03-15 16:57:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:44,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:44,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:44,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:57:44,563 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 925568723, now seen corresponding path program 5 times [2022-03-15 16:57:44,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:44,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952401319] [2022-03-15 16:57:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952401319] [2022-03-15 16:57:44,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952401319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:44,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893176099] [2022-03-15 16:57:44,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:44,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:44,748 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) [2022-03-15 16:57:44,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:57:44,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:44,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:57:44,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:44,976 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 [2022-03-15 16:57:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:45,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:45,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:45,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-15 16:57:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:45,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893176099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:45,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:45,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-15 16:57:45,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125425029] [2022-03-15 16:57:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:45,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:45,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:45,516 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:46,559 INFO L93 Difference]: Finished difference Result 278 states and 524 transitions. [2022-03-15 16:57:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:57:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:46,561 INFO L225 Difference]: With dead ends: 278 [2022-03-15 16:57:46,561 INFO L226 Difference]: Without dead ends: 269 [2022-03-15 16:57:46,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:57:46,562 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 118 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:46,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 397 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:57:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-15 16:57:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 168. [2022-03-15 16:57:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2022-03-15 16:57:46,570 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2022-03-15 16:57:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:46,570 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2022-03-15 16:57:46,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2022-03-15 16:57:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:46,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:46,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:46,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:46,791 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 [2022-03-15 16:57:46,791 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1018666131, now seen corresponding path program 6 times [2022-03-15 16:57:46,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:46,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882419488] [2022-03-15 16:57:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:46,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:46,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882419488] [2022-03-15 16:57:46,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882419488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245196747] [2022-03-15 16:57:46,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:47,004 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) [2022-03-15 16:57:47,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:57:47,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:57:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245196747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:47,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:47,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-15 16:57:47,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446559773] [2022-03-15 16:57:47,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:47,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:57:47,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:57:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:57:47,585 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:48,251 INFO L93 Difference]: Finished difference Result 301 states and 564 transitions. [2022-03-15 16:57:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:57:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:48,256 INFO L225 Difference]: With dead ends: 301 [2022-03-15 16:57:48,256 INFO L226 Difference]: Without dead ends: 287 [2022-03-15 16:57:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:57:48,259 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-15 16:57:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 166. [2022-03-15 16:57:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9393939393939394) internal successors, (320), 165 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 320 transitions. [2022-03-15 16:57:48,265 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 320 transitions. Word has length 21 [2022-03-15 16:57:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 320 transitions. [2022-03-15 16:57:48,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 320 transitions. [2022-03-15 16:57:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:48,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:48,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:48,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:48,483 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 [2022-03-15 16:57:48,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash -96963991, now seen corresponding path program 7 times [2022-03-15 16:57:48,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:48,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91629562] [2022-03-15 16:57:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:48,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:48,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91629562] [2022-03-15 16:57:48,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91629562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:48,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551204534] [2022-03-15 16:57:48,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:57:48,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:48,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:48,699 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) [2022-03-15 16:57:48,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:57:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:48,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:49,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551204534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:49,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:49,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-15 16:57:49,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964609585] [2022-03-15 16:57:49,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:49,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:49,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:49,251 INFO L87 Difference]: Start difference. First operand 166 states and 320 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:49,865 INFO L93 Difference]: Finished difference Result 297 states and 558 transitions. [2022-03-15 16:57:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:57:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:49,867 INFO L225 Difference]: With dead ends: 297 [2022-03-15 16:57:49,867 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 16:57:49,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:57:49,868 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:49,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 214 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 16:57:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 160. [2022-03-15 16:57:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2022-03-15 16:57:49,874 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2022-03-15 16:57:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2022-03-15 16:57:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2022-03-15 16:57:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:49,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:49,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:49,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:50,091 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 [2022-03-15 16:57:50,092 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash 585868805, now seen corresponding path program 8 times [2022-03-15 16:57:50,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:50,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171297746] [2022-03-15 16:57:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:50,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:50,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171297746] [2022-03-15 16:57:50,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171297746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:50,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186145369] [2022-03-15 16:57:50,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:50,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:50,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:50,276 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) [2022-03-15 16:57:50,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:57:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:50,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:50,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:50,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186145369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:50,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:50,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 16:57:50,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255594556] [2022-03-15 16:57:50,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:50,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:57:50,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:57:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:57:50,791 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:51,452 INFO L93 Difference]: Finished difference Result 274 states and 517 transitions. [2022-03-15 16:57:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:57:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:51,454 INFO L225 Difference]: With dead ends: 274 [2022-03-15 16:57:51,454 INFO L226 Difference]: Without dead ends: 265 [2022-03-15 16:57:51,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:57:51,455 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:51,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 210 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-15 16:57:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2022-03-15 16:57:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2022-03-15 16:57:51,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2022-03-15 16:57:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:51,461 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2022-03-15 16:57:51,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2022-03-15 16:57:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:51,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:51,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:51,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:51,675 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1467934529, now seen corresponding path program 9 times [2022-03-15 16:57:51,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:51,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037569556] [2022-03-15 16:57:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:51,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:51,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037569556] [2022-03-15 16:57:51,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037569556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:51,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945117235] [2022-03-15 16:57:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:51,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:51,856 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) [2022-03-15 16:57:51,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:57:51,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:57:51,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:52,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:52,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945117235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:52,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:52,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 16:57:52,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212126795] [2022-03-15 16:57:52,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:57:52,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:57:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:57:52,364 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:53,150 INFO L93 Difference]: Finished difference Result 234 states and 446 transitions. [2022-03-15 16:57:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:57:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:53,151 INFO L225 Difference]: With dead ends: 234 [2022-03-15 16:57:53,151 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 16:57:53,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:57:53,152 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:53,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 165 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 16:57:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2022-03-15 16:57:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2022-03-15 16:57:53,157 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2022-03-15 16:57:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:53,157 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2022-03-15 16:57:53,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2022-03-15 16:57:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:53,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:53,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:53,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:53,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:57:53,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1358366049, now seen corresponding path program 10 times [2022-03-15 16:57:53,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:53,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810070905] [2022-03-15 16:57:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:53,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:53,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810070905] [2022-03-15 16:57:53,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810070905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:53,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964452350] [2022-03-15 16:57:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:53,564 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) [2022-03-15 16:57:53,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:57:53,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:53,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:54,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964452350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:54,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:54,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-15 16:57:54,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394758352] [2022-03-15 16:57:54,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:54,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:57:54,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:57:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:57:54,021 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:54,721 INFO L93 Difference]: Finished difference Result 302 states and 566 transitions. [2022-03-15 16:57:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:57:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:54,722 INFO L225 Difference]: With dead ends: 302 [2022-03-15 16:57:54,722 INFO L226 Difference]: Without dead ends: 288 [2022-03-15 16:57:54,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:57:54,723 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:54,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 271 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:57:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-15 16:57:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 163. [2022-03-15 16:57:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.9444444444444444) internal successors, (315), 162 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 315 transitions. [2022-03-15 16:57:54,729 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 315 transitions. Word has length 21 [2022-03-15 16:57:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:54,730 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 315 transitions. [2022-03-15 16:57:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 315 transitions. [2022-03-15 16:57:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:57:54,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:54,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:54,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:54,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:54,935 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -436663909, now seen corresponding path program 11 times [2022-03-15 16:57:54,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:54,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14080278] [2022-03-15 16:57:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:55,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14080278] [2022-03-15 16:57:55,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14080278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:55,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954753916] [2022-03-15 16:57:55,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:55,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:55,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:55,153 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) [2022-03-15 16:57:55,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:57:55,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954753916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:55,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:55,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-15 16:57:55,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641086236] [2022-03-15 16:57:55,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:55,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:55,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:55,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:55,732 INFO L87 Difference]: Start difference. First operand 163 states and 315 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:56,464 INFO L93 Difference]: Finished difference Result 312 states and 580 transitions. [2022-03-15 16:57:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:57:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:57:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:56,466 INFO L225 Difference]: With dead ends: 312 [2022-03-15 16:57:56,466 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 16:57:56,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:57:56,467 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:56,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 228 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 624 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-15 16:57:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 16:57:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 154. [2022-03-15 16:57:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2022-03-15 16:57:56,472 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2022-03-15 16:57:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:56,472 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2022-03-15 16:57:56,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2022-03-15 16:57:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:57:56,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:56,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:56,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:56,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 16:57:56,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -457303751, now seen corresponding path program 1 times [2022-03-15 16:57:56,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:56,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255863212] [2022-03-15 16:57:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:56,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255863212] [2022-03-15 16:57:56,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255863212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:56,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678644010] [2022-03-15 16:57:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:56,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:56,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:56,736 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) [2022-03-15 16:57:56,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:57:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:57:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:56,821 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 [2022-03-15 16:57:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:56,887 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:56,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 16:57:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678644010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:56,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:56,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 16:57:56,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212260026] [2022-03-15 16:57:56,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 16:57:56,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 16:57:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:57:56,895 INFO L87 Difference]: Start difference. First operand 154 states and 296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:56,961 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2022-03-15 16:57:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:57:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:57:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:56,962 INFO L225 Difference]: With dead ends: 212 [2022-03-15 16:57:56,962 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 16:57:56,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:57:56,963 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:56,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 162 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:57:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 16:57:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2022-03-15 16:57:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2022-03-15 16:57:56,968 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2022-03-15 16:57:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:56,968 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2022-03-15 16:57:56,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2022-03-15 16:57:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:56,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:56,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:56,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:57:57,183 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1932903841, now seen corresponding path program 12 times [2022-03-15 16:57:57,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:57,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681003852] [2022-03-15 16:57:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:57,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:57,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681003852] [2022-03-15 16:57:57,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681003852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:57:57,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:57:57,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:57:57,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205238252] [2022-03-15 16:57:57,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:57:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:57:57,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:57:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:57:57,219 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:57,239 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2022-03-15 16:57:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:57:57,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:57,241 INFO L225 Difference]: With dead ends: 416 [2022-03-15 16:57:57,241 INFO L226 Difference]: Without dead ends: 372 [2022-03-15 16:57:57,242 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 [2022-03-15 16:57:57,242 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:57,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:57:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-03-15 16:57:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2022-03-15 16:57:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2022-03-15 16:57:57,254 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2022-03-15 16:57:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:57,254 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2022-03-15 16:57:57,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2022-03-15 16:57:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:57:57,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:57,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:57,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-15 16:57:57,256 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2125140257, now seen corresponding path program 2 times [2022-03-15 16:57:57,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:57,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531498947] [2022-03-15 16:57:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:57,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:57,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531498947] [2022-03-15 16:57:57,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531498947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:57,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128850971] [2022-03-15 16:57:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:57,700 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) [2022-03-15 16:57:57,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:57:57,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:57:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:57,959 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 15 treesize of output 7 [2022-03-15 16:57:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:58,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:57:58,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:57:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:58,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128850971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:58,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:58,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2022-03-15 16:57:58,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003195099] [2022-03-15 16:57:58,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:58,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:57:58,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:58,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:57:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:57:58,895 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:00,535 INFO L93 Difference]: Finished difference Result 670 states and 1321 transitions. [2022-03-15 16:58:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:58:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:00,538 INFO L225 Difference]: With dead ends: 670 [2022-03-15 16:58:00,538 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 16:58:00,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=3697, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:58:00,540 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 206 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:00,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 479 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:58:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 16:58:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 355. [2022-03-15 16:58:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2022-03-15 16:58:00,551 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2022-03-15 16:58:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:00,551 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2022-03-15 16:58:00,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2022-03-15 16:58:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:00,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:00,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:00,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:00,775 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 [2022-03-15 16:58:00,776 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1190255993, now seen corresponding path program 3 times [2022-03-15 16:58:00,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:00,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610928986] [2022-03-15 16:58:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:01,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610928986] [2022-03-15 16:58:01,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610928986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:01,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883402809] [2022-03-15 16:58:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:01,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:01,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:01,125 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) [2022-03-15 16:58:01,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:58:01,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:58:01,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:01,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:01,358 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 [2022-03-15 16:58:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:02,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:02,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:02,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883402809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:02,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:02,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-15 16:58:02,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974632177] [2022-03-15 16:58:02,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:02,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:58:02,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:58:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:58:02,250 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:04,171 INFO L93 Difference]: Finished difference Result 708 states and 1382 transitions. [2022-03-15 16:58:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:58:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:04,174 INFO L225 Difference]: With dead ends: 708 [2022-03-15 16:58:04,174 INFO L226 Difference]: Without dead ends: 699 [2022-03-15 16:58:04,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:58:04,176 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:04,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 605 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:58:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-15 16:58:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 384. [2022-03-15 16:58:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2022-03-15 16:58:04,188 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2022-03-15 16:58:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:04,188 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2022-03-15 16:58:04,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2022-03-15 16:58:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:04,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:04,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:04,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:04,407 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 [2022-03-15 16:58:04,408 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash -308190269, now seen corresponding path program 4 times [2022-03-15 16:58:04,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:04,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689333786] [2022-03-15 16:58:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:04,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:04,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689333786] [2022-03-15 16:58:04,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689333786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:04,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78282355] [2022-03-15 16:58:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:04,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:04,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:04,775 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) [2022-03-15 16:58:04,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:58:04,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:04,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:05,039 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 15 treesize of output 7 [2022-03-15 16:58:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:05,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:05,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:05,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:06,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78282355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:06,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:06,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-15 16:58:06,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660143048] [2022-03-15 16:58:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:58:06,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:58:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:58:06,032 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:07,899 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2022-03-15 16:58:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:58:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:07,902 INFO L225 Difference]: With dead ends: 575 [2022-03-15 16:58:07,902 INFO L226 Difference]: Without dead ends: 560 [2022-03-15 16:58:07,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:58:07,903 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 215 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:07,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 404 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:58:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-15 16:58:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 380. [2022-03-15 16:58:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2022-03-15 16:58:07,913 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2022-03-15 16:58:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:07,913 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2022-03-15 16:58:07,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2022-03-15 16:58:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:07,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:07,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:07,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:58:08,127 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 [2022-03-15 16:58:08,127 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1160476449, now seen corresponding path program 5 times [2022-03-15 16:58:08,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:08,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370844991] [2022-03-15 16:58:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:08,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:08,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370844991] [2022-03-15 16:58:08,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370844991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:08,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498714779] [2022-03-15 16:58:08,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:08,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:08,505 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) [2022-03-15 16:58:08,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:58:08,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:08,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:58:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:08,724 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 [2022-03-15 16:58:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:09,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:09,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498714779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:09,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:09,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2022-03-15 16:58:09,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494921238] [2022-03-15 16:58:09,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:58:09,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:58:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:58:09,599 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:10,996 INFO L93 Difference]: Finished difference Result 731 states and 1429 transitions. [2022-03-15 16:58:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:58:10,996 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:10,998 INFO L225 Difference]: With dead ends: 731 [2022-03-15 16:58:10,998 INFO L226 Difference]: Without dead ends: 686 [2022-03-15 16:58:10,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=3305, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:58:11,000 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:11,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 436 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:58:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-15 16:58:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 368. [2022-03-15 16:58:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2022-03-15 16:58:11,010 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2022-03-15 16:58:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:11,011 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2022-03-15 16:58:11,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2022-03-15 16:58:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:11,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:11,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:11,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:11,235 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 [2022-03-15 16:58:11,235 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -717883435, now seen corresponding path program 6 times [2022-03-15 16:58:11,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:11,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178556581] [2022-03-15 16:58:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:11,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:11,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178556581] [2022-03-15 16:58:11,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178556581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:11,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864572900] [2022-03-15 16:58:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:11,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:11,616 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) [2022-03-15 16:58:11,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:58:11,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:58:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:11,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:11,844 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 [2022-03-15 16:58:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:12,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:12,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:12,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:12,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864572900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:12,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:12,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-03-15 16:58:12,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379254018] [2022-03-15 16:58:12,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:12,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:58:12,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:58:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:58:12,680 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:14,317 INFO L93 Difference]: Finished difference Result 735 states and 1433 transitions. [2022-03-15 16:58:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:58:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:14,319 INFO L225 Difference]: With dead ends: 735 [2022-03-15 16:58:14,319 INFO L226 Difference]: Without dead ends: 702 [2022-03-15 16:58:14,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=3782, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:58:14,320 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:14,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 534 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:58:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-15 16:58:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2022-03-15 16:58:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2022-03-15 16:58:14,331 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2022-03-15 16:58:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:14,331 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2022-03-15 16:58:14,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2022-03-15 16:58:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:14,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:14,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:14,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-15 16:58:14,547 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 [2022-03-15 16:58:14,547 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 265021255, now seen corresponding path program 7 times [2022-03-15 16:58:14,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:14,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877659720] [2022-03-15 16:58:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:14,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:14,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877659720] [2022-03-15 16:58:14,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877659720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:14,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025980248] [2022-03-15 16:58:14,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:14,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:14,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:14,918 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) [2022-03-15 16:58:14,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:58:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:15,145 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 15 treesize of output 7 [2022-03-15 16:58:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:15,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:15,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:16,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025980248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:16,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:16,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-03-15 16:58:16,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676956029] [2022-03-15 16:58:16,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:16,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:16,049 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:17,848 INFO L93 Difference]: Finished difference Result 745 states and 1449 transitions. [2022-03-15 16:58:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:58:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:17,851 INFO L225 Difference]: With dead ends: 745 [2022-03-15 16:58:17,851 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 16:58:17,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=403, Invalid=4289, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:58:17,852 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 195 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:17,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 586 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:58:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 16:58:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 364. [2022-03-15 16:58:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-03-15 16:58:17,862 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-03-15 16:58:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:17,862 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-03-15 16:58:17,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-03-15 16:58:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:17,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:17,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:17,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:18,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:18,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 103016025, now seen corresponding path program 8 times [2022-03-15 16:58:18,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:18,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016850414] [2022-03-15 16:58:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:18,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:18,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016850414] [2022-03-15 16:58:18,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016850414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:18,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724308758] [2022-03-15 16:58:18,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:18,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:18,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:18,423 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) [2022-03-15 16:58:18,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:58:18,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:18,679 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 15 treesize of output 7 [2022-03-15 16:58:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:18,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:19,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:19,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:19,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724308758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:19,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:19,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-03-15 16:58:19,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9657073] [2022-03-15 16:58:19,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:19,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:19,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:19,560 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:21,159 INFO L93 Difference]: Finished difference Result 702 states and 1377 transitions. [2022-03-15 16:58:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:58:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:21,162 INFO L225 Difference]: With dead ends: 702 [2022-03-15 16:58:21,162 INFO L226 Difference]: Without dead ends: 695 [2022-03-15 16:58:21,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=360, Invalid=3930, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:58:21,163 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:21,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 664 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:58:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-15 16:58:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 364. [2022-03-15 16:58:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-03-15 16:58:21,173 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-03-15 16:58:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:21,173 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-03-15 16:58:21,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-03-15 16:58:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:21,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:21,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:21,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 16:58:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:21,395 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 790273287, now seen corresponding path program 9 times [2022-03-15 16:58:21,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:21,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27216313] [2022-03-15 16:58:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:21,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:21,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27216313] [2022-03-15 16:58:21,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27216313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:21,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918480517] [2022-03-15 16:58:21,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:21,780 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) [2022-03-15 16:58:21,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:58:21,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:58:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:58:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:22,010 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 [2022-03-15 16:58:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:22,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:22,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:22,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:22,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918480517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:22,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:22,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:58:22,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850929609] [2022-03-15 16:58:22,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:22,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:22,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:22,911 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:26,203 INFO L93 Difference]: Finished difference Result 873 states and 1711 transitions. [2022-03-15 16:58:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:58:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:26,206 INFO L225 Difference]: With dead ends: 873 [2022-03-15 16:58:26,206 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 16:58:26,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=925, Invalid=7817, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:58:26,208 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 359 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 410 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:58:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 16:58:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 386. [2022-03-15 16:58:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2022-03-15 16:58:26,218 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2022-03-15 16:58:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:26,218 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2022-03-15 16:58:26,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2022-03-15 16:58:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:26,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:26,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:26,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 16:58:26,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:26,439 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1672339011, now seen corresponding path program 10 times [2022-03-15 16:58:26,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:26,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581873984] [2022-03-15 16:58:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:26,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:26,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581873984] [2022-03-15 16:58:26,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581873984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:26,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315697589] [2022-03-15 16:58:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:26,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:26,842 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) [2022-03-15 16:58:26,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:58:26,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:27,064 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 [2022-03-15 16:58:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:27,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:27,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:28,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315697589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:28,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:28,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:58:28,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673121200] [2022-03-15 16:58:28,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:28,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:28,009 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:31,627 INFO L93 Difference]: Finished difference Result 727 states and 1429 transitions. [2022-03-15 16:58:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:58:31,627 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:31,629 INFO L225 Difference]: With dead ends: 727 [2022-03-15 16:58:31,629 INFO L226 Difference]: Without dead ends: 712 [2022-03-15 16:58:31,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=948, Invalid=7608, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:58:31,631 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:31,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 400 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:58:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-15 16:58:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 384. [2022-03-15 16:58:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2022-03-15 16:58:31,640 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2022-03-15 16:58:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:31,641 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2022-03-15 16:58:31,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2022-03-15 16:58:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:31,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:31,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:31,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 16:58:31,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:58:31,863 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1153961567, now seen corresponding path program 11 times [2022-03-15 16:58:31,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:31,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928165056] [2022-03-15 16:58:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:32,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:32,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928165056] [2022-03-15 16:58:32,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928165056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:32,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009376504] [2022-03-15 16:58:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:32,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:32,205 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) [2022-03-15 16:58:32,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:58:32,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:58:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:32,426 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 [2022-03-15 16:58:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:33,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:33,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:33,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009376504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:33,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:33,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:58:33,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274391797] [2022-03-15 16:58:33,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:33,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:33,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:33,399 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:36,761 INFO L93 Difference]: Finished difference Result 800 states and 1548 transitions. [2022-03-15 16:58:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:58:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:36,764 INFO L225 Difference]: With dead ends: 800 [2022-03-15 16:58:36,764 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 16:58:36,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=974, Invalid=8338, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:58:36,765 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 363 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:36,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 536 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2472 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2022-03-15 16:58:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 16:58:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 408. [2022-03-15 16:58:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2022-03-15 16:58:36,775 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2022-03-15 16:58:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:36,775 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2022-03-15 16:58:36,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2022-03-15 16:58:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:36,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:36,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:36,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 16:58:36,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:58:36,991 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash -176520031, now seen corresponding path program 12 times [2022-03-15 16:58:36,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:36,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834648682] [2022-03-15 16:58:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:37,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:37,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834648682] [2022-03-15 16:58:37,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834648682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:37,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079744936] [2022-03-15 16:58:37,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:37,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:37,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:37,363 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) [2022-03-15 16:58:37,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:58:37,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:58:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:58:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:37,608 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 [2022-03-15 16:58:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:38,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:38,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:38,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079744936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:38,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:38,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:58:38,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280577172] [2022-03-15 16:58:38,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:38,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:38,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:38,643 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:42,267 INFO L93 Difference]: Finished difference Result 928 states and 1802 transitions. [2022-03-15 16:58:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:58:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:42,269 INFO L225 Difference]: With dead ends: 928 [2022-03-15 16:58:42,269 INFO L226 Difference]: Without dead ends: 886 [2022-03-15 16:58:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1003, Invalid=8503, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:58:42,271 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 351 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:42,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 547 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2390 Invalid, 0 Unknown, 103 Unchecked, 1.0s Time] [2022-03-15 16:58:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-15 16:58:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 386. [2022-03-15 16:58:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2022-03-15 16:58:42,281 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2022-03-15 16:58:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:42,281 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2022-03-15 16:58:42,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2022-03-15 16:58:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:42,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:42,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:42,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:42,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:42,486 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash -265343177, now seen corresponding path program 13 times [2022-03-15 16:58:42,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:42,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410250832] [2022-03-15 16:58:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:42,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:42,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410250832] [2022-03-15 16:58:42,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410250832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:42,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359177293] [2022-03-15 16:58:42,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:42,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:42,939 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) [2022-03-15 16:58:42,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:58:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:43,193 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 [2022-03-15 16:58:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:44,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:44,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:44,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359177293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:44,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:44,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:58:44,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426338191] [2022-03-15 16:58:44,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:44,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:44,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:44,127 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:46,617 INFO L93 Difference]: Finished difference Result 758 states and 1487 transitions. [2022-03-15 16:58:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:58:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:46,620 INFO L225 Difference]: With dead ends: 758 [2022-03-15 16:58:46,620 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 16:58:46,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=653, Invalid=5827, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:58:46,621 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 261 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:46,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 470 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:58:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 16:58:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 388. [2022-03-15 16:58:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2022-03-15 16:58:46,631 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2022-03-15 16:58:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:46,631 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2022-03-15 16:58:46,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2022-03-15 16:58:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:46,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:46,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:46,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:46,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:46,846 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash 616722547, now seen corresponding path program 14 times [2022-03-15 16:58:46,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:46,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925776737] [2022-03-15 16:58:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:47,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:47,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925776737] [2022-03-15 16:58:47,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925776737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:47,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35981975] [2022-03-15 16:58:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:47,208 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) [2022-03-15 16:58:47,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:58:47,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:47,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:47,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:47,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:47,438 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 [2022-03-15 16:58:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:47,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:48,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:48,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:48,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35981975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:48,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:48,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:58:48,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187521944] [2022-03-15 16:58:48,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:48,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:48,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:48,459 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:51,304 INFO L93 Difference]: Finished difference Result 628 states and 1232 transitions. [2022-03-15 16:58:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:58:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:51,306 INFO L225 Difference]: With dead ends: 628 [2022-03-15 16:58:51,306 INFO L226 Difference]: Without dead ends: 595 [2022-03-15 16:58:51,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=713, Invalid=6093, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:58:51,307 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 309 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:51,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 472 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2196 Invalid, 0 Unknown, 71 Unchecked, 0.9s Time] [2022-03-15 16:58:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-15 16:58:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 378. [2022-03-15 16:58:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2022-03-15 16:58:51,314 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2022-03-15 16:58:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:51,314 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2022-03-15 16:58:51,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2022-03-15 16:58:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:51,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:51,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:51,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:51,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:58:51,527 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash -261285103, now seen corresponding path program 15 times [2022-03-15 16:58:51,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:51,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555725581] [2022-03-15 16:58:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:51,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:51,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:51,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555725581] [2022-03-15 16:58:51,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555725581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:51,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183902314] [2022-03-15 16:58:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:51,863 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) [2022-03-15 16:58:51,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:58:51,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:58:51,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:52,063 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 15 treesize of output 7 [2022-03-15 16:58:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:52,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:52,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:52,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:52,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183902314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:52,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:52,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-03-15 16:58:52,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447046914] [2022-03-15 16:58:52,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:52,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:52,976 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:55,297 INFO L93 Difference]: Finished difference Result 770 states and 1520 transitions. [2022-03-15 16:58:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:58:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:55,300 INFO L225 Difference]: With dead ends: 770 [2022-03-15 16:58:55,300 INFO L226 Difference]: Without dead ends: 737 [2022-03-15 16:58:55,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=609, Invalid=5243, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:58:55,300 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 244 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:55,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 465 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:58:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-03-15 16:58:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 376. [2022-03-15 16:58:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2022-03-15 16:58:55,307 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2022-03-15 16:58:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:55,308 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2022-03-15 16:58:55,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2022-03-15 16:58:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:55,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:55,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:55,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:55,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:58:55,525 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash 224852401, now seen corresponding path program 16 times [2022-03-15 16:58:55,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:55,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466105441] [2022-03-15 16:58:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:55,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:55,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466105441] [2022-03-15 16:58:55,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466105441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:55,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048278750] [2022-03-15 16:58:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:55,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:55,944 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) [2022-03-15 16:58:55,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:58:55,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:56,166 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 [2022-03-15 16:58:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:56,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:56,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:58:56,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:58:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:57,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048278750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:57,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:57,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:58:57,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705076127] [2022-03-15 16:58:57,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:57,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:58:57,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:58:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:58:57,046 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:59,574 INFO L93 Difference]: Finished difference Result 768 states and 1506 transitions. [2022-03-15 16:58:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:58:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:58:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:59,576 INFO L225 Difference]: With dead ends: 768 [2022-03-15 16:58:59,576 INFO L226 Difference]: Without dead ends: 759 [2022-03-15 16:58:59,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=609, Invalid=6033, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:58:59,577 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 263 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:59,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 446 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:58:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-15 16:58:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 391. [2022-03-15 16:58:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2022-03-15 16:58:59,587 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2022-03-15 16:58:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:59,587 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2022-03-15 16:58:59,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2022-03-15 16:58:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:58:59,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:59,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:59,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:59,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:58:59,814 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1106918125, now seen corresponding path program 17 times [2022-03-15 16:58:59,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:59,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425626012] [2022-03-15 16:58:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:00,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:00,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425626012] [2022-03-15 16:59:00,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425626012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:00,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077898263] [2022-03-15 16:59:00,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:00,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:00,235 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) [2022-03-15 16:59:00,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:59:00,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:00,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:00,474 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 [2022-03-15 16:59:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:01,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:01,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:01,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077898263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:01,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:01,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:01,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782532891] [2022-03-15 16:59:01,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:01,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:01,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:01,394 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:04,307 INFO L93 Difference]: Finished difference Result 660 states and 1303 transitions. [2022-03-15 16:59:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:59:04,307 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:04,309 INFO L225 Difference]: With dead ends: 660 [2022-03-15 16:59:04,309 INFO L226 Difference]: Without dead ends: 645 [2022-03-15 16:59:04,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=653, Invalid=5989, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:59:04,310 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 284 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:04,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 497 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-03-15 16:59:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 389. [2022-03-15 16:59:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2022-03-15 16:59:04,316 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2022-03-15 16:59:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:04,316 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2022-03-15 16:59:04,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2022-03-15 16:59:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:04,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:04,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:04,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 16:59:04,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:04,517 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1719382453, now seen corresponding path program 18 times [2022-03-15 16:59:04,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:04,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481220638] [2022-03-15 16:59:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:04,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:04,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:04,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481220638] [2022-03-15 16:59:04,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481220638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:04,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023774119] [2022-03-15 16:59:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:04,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:04,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:04,880 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) [2022-03-15 16:59:04,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:59:04,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:59:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:05,093 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 [2022-03-15 16:59:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:05,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:05,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:05,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:05,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023774119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:05,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:05,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:59:05,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534415386] [2022-03-15 16:59:05,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:05,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:59:05,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:59:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:59:05,950 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:08,489 INFO L93 Difference]: Finished difference Result 783 states and 1542 transitions. [2022-03-15 16:59:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:59:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:08,493 INFO L225 Difference]: With dead ends: 783 [2022-03-15 16:59:08,493 INFO L226 Difference]: Without dead ends: 738 [2022-03-15 16:59:08,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=615, Invalid=5547, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:59:08,495 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 270 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:08,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 449 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:59:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-03-15 16:59:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 381. [2022-03-15 16:59:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-03-15 16:59:08,504 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-03-15 16:59:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:08,504 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-03-15 16:59:08,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-03-15 16:59:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:08,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:08,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:08,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:59:08,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:08,719 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 228910475, now seen corresponding path program 19 times [2022-03-15 16:59:08,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:08,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183651045] [2022-03-15 16:59:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:09,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:09,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183651045] [2022-03-15 16:59:09,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183651045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:09,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113197137] [2022-03-15 16:59:09,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:09,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:09,053 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) [2022-03-15 16:59:09,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:59:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:09,265 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 [2022-03-15 16:59:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:09,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:10,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:10,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:10,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113197137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:10,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:10,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-03-15 16:59:10,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578524355] [2022-03-15 16:59:10,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:59:10,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:59:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:59:10,168 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:12,331 INFO L93 Difference]: Finished difference Result 766 states and 1511 transitions. [2022-03-15 16:59:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:59:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:12,333 INFO L225 Difference]: With dead ends: 766 [2022-03-15 16:59:12,333 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 16:59:12,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=564, Invalid=5288, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:59:12,334 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:12,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 404 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:59:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 16:59:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 379. [2022-03-15 16:59:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2022-03-15 16:59:12,341 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2022-03-15 16:59:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:12,341 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2022-03-15 16:59:12,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2022-03-15 16:59:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:12,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:12,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:12,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:59:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:12,542 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2110598265, now seen corresponding path program 20 times [2022-03-15 16:59:12,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:12,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354850710] [2022-03-15 16:59:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:12,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:12,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354850710] [2022-03-15 16:59:12,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354850710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:12,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029964857] [2022-03-15 16:59:12,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:59:12,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:12,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:12,956 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) [2022-03-15 16:59:12,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:59:12,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:12,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:13,161 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 15 treesize of output 7 [2022-03-15 16:59:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:13,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:14,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:14,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:14,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029964857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:14,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:14,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-03-15 16:59:14,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170999122] [2022-03-15 16:59:14,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:14,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:59:14,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:59:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:59:14,143 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:16,647 INFO L93 Difference]: Finished difference Result 767 states and 1512 transitions. [2022-03-15 16:59:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:59:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:16,649 INFO L225 Difference]: With dead ends: 767 [2022-03-15 16:59:16,649 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 16:59:16,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=589, Invalid=5891, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:59:16,650 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:16,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 629 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 16:59:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 377. [2022-03-15 16:59:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-03-15 16:59:16,656 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-03-15 16:59:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:16,656 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-03-15 16:59:16,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-03-15 16:59:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:16,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:16,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:16,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:16,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 16:59:16,858 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:16,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1453752901, now seen corresponding path program 21 times [2022-03-15 16:59:16,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:16,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462867619] [2022-03-15 16:59:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:16,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:17,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:17,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462867619] [2022-03-15 16:59:17,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462867619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:17,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77535259] [2022-03-15 16:59:17,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:59:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:17,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:17,219 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) [2022-03-15 16:59:17,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:59:17,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:59:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:17,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:17,471 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 [2022-03-15 16:59:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:17,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:18,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:18,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:18,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77535259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:18,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:18,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:18,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050769110] [2022-03-15 16:59:18,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:18,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:18,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:18,316 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:20,641 INFO L93 Difference]: Finished difference Result 771 states and 1503 transitions. [2022-03-15 16:59:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:59:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:20,644 INFO L225 Difference]: With dead ends: 771 [2022-03-15 16:59:20,644 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 16:59:20,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=568, Invalid=5752, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:59:20,644 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:20,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 515 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:59:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 16:59:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 406. [2022-03-15 16:59:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-03-15 16:59:20,653 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-03-15 16:59:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:20,653 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-03-15 16:59:20,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-03-15 16:59:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:20,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:20,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:20,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:20,871 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash -571687177, now seen corresponding path program 22 times [2022-03-15 16:59:20,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:20,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609288119] [2022-03-15 16:59:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:21,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:21,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609288119] [2022-03-15 16:59:21,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609288119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:21,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252444842] [2022-03-15 16:59:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:59:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:21,282 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) [2022-03-15 16:59:21,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:59:21,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:59:21,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:21,540 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 [2022-03-15 16:59:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:21,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:22,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:22,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:22,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252444842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:22,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:22,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:22,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444265992] [2022-03-15 16:59:22,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:22,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:22,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:22,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:22,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:22,441 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:25,083 INFO L93 Difference]: Finished difference Result 632 states and 1237 transitions. [2022-03-15 16:59:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:59:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:25,085 INFO L225 Difference]: With dead ends: 632 [2022-03-15 16:59:25,085 INFO L226 Difference]: Without dead ends: 617 [2022-03-15 16:59:25,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=614, Invalid=5866, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:59:25,086 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:25,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 454 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-15 16:59:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 402. [2022-03-15 16:59:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-03-15 16:59:25,092 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-03-15 16:59:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:25,092 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-03-15 16:59:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-03-15 16:59:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:25,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:25,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:25,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:25,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:25,294 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash 896979541, now seen corresponding path program 23 times [2022-03-15 16:59:25,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:25,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666433353] [2022-03-15 16:59:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:25,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:25,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666433353] [2022-03-15 16:59:25,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666433353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:25,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061124280] [2022-03-15 16:59:25,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:25,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:25,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:25,664 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) [2022-03-15 16:59:25,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:59:25,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:59:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:25,917 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 [2022-03-15 16:59:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:26,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:26,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:26,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:26,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061124280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:26,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:26,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:59:26,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834387816] [2022-03-15 16:59:26,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:26,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:59:26,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:59:26,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:59:26,799 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:28,802 INFO L93 Difference]: Finished difference Result 794 states and 1550 transitions. [2022-03-15 16:59:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:59:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:28,804 INFO L225 Difference]: With dead ends: 794 [2022-03-15 16:59:28,804 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 16:59:28,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=541, Invalid=4861, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:59:28,805 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 227 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:28,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 432 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1576 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2022-03-15 16:59:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 16:59:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 389. [2022-03-15 16:59:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2022-03-15 16:59:28,812 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2022-03-15 16:59:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:28,812 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2022-03-15 16:59:28,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2022-03-15 16:59:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:28,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:28,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:28,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 16:59:29,031 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1449694827, now seen corresponding path program 24 times [2022-03-15 16:59:29,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:29,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313935741] [2022-03-15 16:59:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:29,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:29,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:29,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313935741] [2022-03-15 16:59:29,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313935741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:29,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409293367] [2022-03-15 16:59:29,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:29,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:29,344 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) [2022-03-15 16:59:29,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:59:29,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:59:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:29,572 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 15 treesize of output 7 [2022-03-15 16:59:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:29,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:30,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:30,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:30,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409293367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:30,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:30,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-03-15 16:59:30,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280770041] [2022-03-15 16:59:30,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:30,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:59:30,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:59:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:59:30,433 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:32,441 INFO L93 Difference]: Finished difference Result 798 states and 1554 transitions. [2022-03-15 16:59:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:59:32,441 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:32,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:32,443 INFO L225 Difference]: With dead ends: 798 [2022-03-15 16:59:32,443 INFO L226 Difference]: Without dead ends: 765 [2022-03-15 16:59:32,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=522, Invalid=5028, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:59:32,444 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 255 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:32,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 432 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:59:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-15 16:59:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 386. [2022-03-15 16:59:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2022-03-15 16:59:32,451 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2022-03-15 16:59:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:32,451 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2022-03-15 16:59:32,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2022-03-15 16:59:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:32,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:32,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:32,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:59:32,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:59:32,653 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 505763729, now seen corresponding path program 25 times [2022-03-15 16:59:32,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:32,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581213327] [2022-03-15 16:59:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:33,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:33,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581213327] [2022-03-15 16:59:33,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581213327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:33,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317972419] [2022-03-15 16:59:33,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:33,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:33,015 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) [2022-03-15 16:59:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:59:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:33,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:33,272 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 [2022-03-15 16:59:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:33,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:34,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:34,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:34,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317972419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:34,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:34,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-03-15 16:59:34,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291219816] [2022-03-15 16:59:34,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:34,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:59:34,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:59:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:59:34,213 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:36,399 INFO L93 Difference]: Finished difference Result 808 states and 1570 transitions. [2022-03-15 16:59:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:59:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:36,401 INFO L225 Difference]: With dead ends: 808 [2022-03-15 16:59:36,402 INFO L226 Difference]: Without dead ends: 772 [2022-03-15 16:59:36,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=547, Invalid=5615, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:59:36,403 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 221 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:36,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 541 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:59:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-15 16:59:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 383. [2022-03-15 16:59:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2022-03-15 16:59:36,410 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2022-03-15 16:59:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2022-03-15 16:59:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2022-03-15 16:59:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:36,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:36,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:36,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:36,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:59:36,611 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 22360469, now seen corresponding path program 26 times [2022-03-15 16:59:36,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:36,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586993924] [2022-03-15 16:59:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:36,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:36,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586993924] [2022-03-15 16:59:36,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586993924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:36,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340903111] [2022-03-15 16:59:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:59:36,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:36,964 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) [2022-03-15 16:59:36,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:59:36,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:37,243 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 [2022-03-15 16:59:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:38,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:38,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 16:59:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:38,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340903111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:38,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:38,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2022-03-15 16:59:38,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349645721] [2022-03-15 16:59:38,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:38,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:59:38,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:59:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:59:38,330 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:40,887 INFO L93 Difference]: Finished difference Result 760 states and 1483 transitions. [2022-03-15 16:59:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:59:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:40,890 INFO L225 Difference]: With dead ends: 760 [2022-03-15 16:59:40,890 INFO L226 Difference]: Without dead ends: 753 [2022-03-15 16:59:40,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=574, Invalid=6232, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 16:59:40,891 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 211 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:40,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 813 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 16:59:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-03-15 16:59:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 377. [2022-03-15 16:59:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-03-15 16:59:40,899 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-03-15 16:59:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:40,899 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-03-15 16:59:40,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-03-15 16:59:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:40,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:40,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:40,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:59:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:59:41,108 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash 630707147, now seen corresponding path program 27 times [2022-03-15 16:59:41,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:41,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108754553] [2022-03-15 16:59:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:41,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:41,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:41,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108754553] [2022-03-15 16:59:41,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108754553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:41,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104990410] [2022-03-15 16:59:41,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:59:41,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:41,460 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) [2022-03-15 16:59:41,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:59:41,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:59:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:59:41,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:41,654 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 [2022-03-15 16:59:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:41,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:42,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:42,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:42,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104990410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:42,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:42,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:42,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073313640] [2022-03-15 16:59:42,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:42,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:42,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:42,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:42,589 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:44,554 INFO L93 Difference]: Finished difference Result 772 states and 1521 transitions. [2022-03-15 16:59:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:59:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:44,555 INFO L225 Difference]: With dead ends: 772 [2022-03-15 16:59:44,555 INFO L226 Difference]: Without dead ends: 763 [2022-03-15 16:59:44,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=485, Invalid=4771, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:59:44,556 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:44,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 494 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:59:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-03-15 16:59:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 394. [2022-03-15 16:59:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2022-03-15 16:59:44,562 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2022-03-15 16:59:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:44,562 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2022-03-15 16:59:44,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2022-03-15 16:59:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:44,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:44,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:44,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:59:44,763 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1512772871, now seen corresponding path program 28 times [2022-03-15 16:59:44,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:44,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508414169] [2022-03-15 16:59:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:45,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:45,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508414169] [2022-03-15 16:59:45,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508414169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:45,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477708022] [2022-03-15 16:59:45,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:59:45,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:45,140 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:45,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:59:45,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:59:45,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:45,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:45,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:45,337 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 [2022-03-15 16:59:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:46,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:46,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:46,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477708022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:46,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:46,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:46,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589607011] [2022-03-15 16:59:46,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:46,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:46,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:46,302 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:48,568 INFO L93 Difference]: Finished difference Result 846 states and 1686 transitions. [2022-03-15 16:59:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:59:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:48,570 INFO L225 Difference]: With dead ends: 846 [2022-03-15 16:59:48,570 INFO L226 Difference]: Without dead ends: 829 [2022-03-15 16:59:48,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=569, Invalid=5131, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:59:48,571 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 519 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2185 Invalid, 0 Unknown, 106 Unchecked, 0.9s Time] [2022-03-15 16:59:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-03-15 16:59:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 392. [2022-03-15 16:59:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2022-03-15 16:59:48,577 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2022-03-15 16:59:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:48,577 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2022-03-15 16:59:48,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2022-03-15 16:59:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:48,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:48,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:48,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:48,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 16:59:48,778 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1313527707, now seen corresponding path program 29 times [2022-03-15 16:59:48,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:48,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935007035] [2022-03-15 16:59:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:49,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935007035] [2022-03-15 16:59:49,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935007035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694938982] [2022-03-15 16:59:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:49,218 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:49,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:59:49,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:59:49,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:59:49,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:49,474 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 [2022-03-15 16:59:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:49,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:50,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:50,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:50,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694938982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:50,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:50,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:59:50,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695816205] [2022-03-15 16:59:50,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:50,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:59:50,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:59:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:59:50,459 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:52,331 INFO L93 Difference]: Finished difference Result 797 states and 1567 transitions. [2022-03-15 16:59:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:59:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:52,332 INFO L225 Difference]: With dead ends: 797 [2022-03-15 16:59:52,332 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 16:59:52,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=498, Invalid=4614, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:59:52,333 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 191 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:52,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 487 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1726 Invalid, 0 Unknown, 56 Unchecked, 0.7s Time] [2022-03-15 16:59:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 16:59:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 390. [2022-03-15 16:59:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0154241645244215) internal successors, (784), 389 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 784 transitions. [2022-03-15 16:59:52,340 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 784 transitions. Word has length 30 [2022-03-15 16:59:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:52,340 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 784 transitions. [2022-03-15 16:59:52,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 784 transitions. [2022-03-15 16:59:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:52,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:52,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:52,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:52,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:59:52,561 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -391825567, now seen corresponding path program 30 times [2022-03-15 16:59:52,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:52,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120320184] [2022-03-15 16:59:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:52,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:52,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:52,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120320184] [2022-03-15 16:59:52,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120320184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:52,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934907483] [2022-03-15 16:59:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:52,927 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:52,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:59:52,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:59:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 16:59:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:53,117 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 [2022-03-15 16:59:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:53,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:53,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:54,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934907483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:54,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:54,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:54,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291938977] [2022-03-15 16:59:54,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:54,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:54,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:54,051 INFO L87 Difference]: Start difference. First operand 390 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:55,686 INFO L93 Difference]: Finished difference Result 776 states and 1535 transitions. [2022-03-15 16:59:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:59:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:55,688 INFO L225 Difference]: With dead ends: 776 [2022-03-15 16:59:55,688 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 16:59:55,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=477, Invalid=4493, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:59:55,689 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:55,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1500 Invalid, 0 Unknown, 202 Unchecked, 0.6s Time] [2022-03-15 16:59:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 16:59:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 381. [2022-03-15 16:59:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-03-15 16:59:55,695 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-03-15 16:59:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:55,695 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-03-15 16:59:55,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-03-15 16:59:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:55,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:55,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:55,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:55,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:59:55,897 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1666851087, now seen corresponding path program 31 times [2022-03-15 16:59:55,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:55,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075017908] [2022-03-15 16:59:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:56,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075017908] [2022-03-15 16:59:56,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075017908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555942648] [2022-03-15 16:59:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:56,313 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:56,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:59:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:56,558 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 [2022-03-15 16:59:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:57,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:59:57,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 16:59:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:57,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555942648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:57,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:57,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 16:59:57,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712397309] [2022-03-15 16:59:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:57,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:59:57,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:59:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:59:57,494 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:59,832 INFO L93 Difference]: Finished difference Result 849 states and 1671 transitions. [2022-03-15 16:59:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:59:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:59,833 INFO L225 Difference]: With dead ends: 849 [2022-03-15 16:59:59,833 INFO L226 Difference]: Without dead ends: 840 [2022-03-15 16:59:59,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=614, Invalid=5706, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:59:59,834 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 219 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:59,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 466 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-15 16:59:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 395. [2022-03-15 16:59:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2022-03-15 16:59:59,841 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2022-03-15 16:59:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:59,841 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2022-03-15 16:59:59,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2022-03-15 16:59:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:59,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:59,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:59,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:00,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:00,042 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash -784785363, now seen corresponding path program 32 times [2022-03-15 17:00:00,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:00,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222891377] [2022-03-15 17:00:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:00,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:00,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222891377] [2022-03-15 17:00:00,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222891377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:00,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864101970] [2022-03-15 17:00:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:00,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:00,448 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:00,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 17:00:00,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:00,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:00,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:00,646 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 [2022-03-15 17:00:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:01,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:01,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:00:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:01,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864101970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:01,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:01,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:00:01,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837877730] [2022-03-15 17:00:01,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:01,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:00:01,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:00:01,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:00:01,749 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:05,329 INFO L93 Difference]: Finished difference Result 1073 states and 2106 transitions. [2022-03-15 17:00:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 17:00:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:05,330 INFO L225 Difference]: With dead ends: 1073 [2022-03-15 17:00:05,331 INFO L226 Difference]: Without dead ends: 1066 [2022-03-15 17:00:05,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1183, Invalid=8917, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 17:00:05,331 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 329 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:05,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 473 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2469 Invalid, 0 Unknown, 162 Unchecked, 1.0s Time] [2022-03-15 17:00:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-03-15 17:00:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 397. [2022-03-15 17:00:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0126262626262625) internal successors, (797), 396 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 797 transitions. [2022-03-15 17:00:05,341 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 797 transitions. Word has length 30 [2022-03-15 17:00:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:05,341 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 797 transitions. [2022-03-15 17:00:05,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 797 transitions. [2022-03-15 17:00:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:05,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:05,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:05,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 17:00:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:05,555 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 192656173, now seen corresponding path program 33 times [2022-03-15 17:00:05,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:05,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948553188] [2022-03-15 17:00:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:05,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:05,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948553188] [2022-03-15 17:00:05,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948553188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:05,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646187810] [2022-03-15 17:00:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:05,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:05,952 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:05,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 17:00:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:00:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:00:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:06,148 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 [2022-03-15 17:00:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:06,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:07,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:07,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:07,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646187810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:07,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:07,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:00:07,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477782423] [2022-03-15 17:00:07,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:07,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:00:07,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:00:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:00:07,189 INFO L87 Difference]: Start difference. First operand 397 states and 797 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:09,666 INFO L93 Difference]: Finished difference Result 727 states and 1433 transitions. [2022-03-15 17:00:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 17:00:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:09,667 INFO L225 Difference]: With dead ends: 727 [2022-03-15 17:00:09,667 INFO L226 Difference]: Without dead ends: 706 [2022-03-15 17:00:09,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=680, Invalid=5962, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 17:00:09,668 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 251 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:09,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 344 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1704 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-03-15 17:00:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-15 17:00:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 393. [2022-03-15 17:00:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2022-03-15 17:00:09,674 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2022-03-15 17:00:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:09,674 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2022-03-15 17:00:09,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2022-03-15 17:00:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:09,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:09,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:09,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 17:00:09,876 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash 683881355, now seen corresponding path program 34 times [2022-03-15 17:00:09,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:09,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247097902] [2022-03-15 17:00:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:10,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:10,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247097902] [2022-03-15 17:00:10,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247097902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:10,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123905607] [2022-03-15 17:00:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:10,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:10,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:10,313 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 17:00:10,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:10,554 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 [2022-03-15 17:00:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:10,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:11,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:11,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:11,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123905607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:11,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:11,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:00:11,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923421746] [2022-03-15 17:00:11,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:00:11,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:00:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:00:11,415 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:13,881 INFO L93 Difference]: Finished difference Result 864 states and 1702 transitions. [2022-03-15 17:00:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 17:00:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:13,883 INFO L225 Difference]: With dead ends: 864 [2022-03-15 17:00:13,883 INFO L226 Difference]: Without dead ends: 803 [2022-03-15 17:00:13,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=635, Invalid=5527, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:00:13,884 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 224 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:13,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 599 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:00:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-15 17:00:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 392. [2022-03-15 17:00:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2022-03-15 17:00:13,891 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2022-03-15 17:00:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:13,892 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2022-03-15 17:00:13,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2022-03-15 17:00:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:13,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:13,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:13,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 17:00:14,115 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1572499745, now seen corresponding path program 35 times [2022-03-15 17:00:14,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:14,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475603589] [2022-03-15 17:00:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:14,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:14,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475603589] [2022-03-15 17:00:14,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475603589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:14,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949038524] [2022-03-15 17:00:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:14,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:14,479 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:14,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 17:00:14,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:14,673 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 [2022-03-15 17:00:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:14,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:15,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:15,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:15,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949038524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:15,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:15,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:00:15,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698187854] [2022-03-15 17:00:15,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:15,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:00:15,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:00:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:00:15,575 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:17,021 INFO L93 Difference]: Finished difference Result 750 states and 1475 transitions. [2022-03-15 17:00:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:00:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:17,023 INFO L225 Difference]: With dead ends: 750 [2022-03-15 17:00:17,023 INFO L226 Difference]: Without dead ends: 741 [2022-03-15 17:00:17,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:00:17,023 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:17,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 457 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:00:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-15 17:00:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 394. [2022-03-15 17:00:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2022-03-15 17:00:17,031 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2022-03-15 17:00:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2022-03-15 17:00:17,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2022-03-15 17:00:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:17,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:17,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:17,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 17:00:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 17:00:17,247 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1840401827, now seen corresponding path program 36 times [2022-03-15 17:00:17,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:17,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511338070] [2022-03-15 17:00:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:17,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:17,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511338070] [2022-03-15 17:00:17,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511338070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:17,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665227527] [2022-03-15 17:00:17,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:17,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:17,671 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:17,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 17:00:17,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:00:17,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:17,864 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 [2022-03-15 17:00:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:18,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:18,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:18,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:18,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665227527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:18,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:18,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:00:18,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015172220] [2022-03-15 17:00:18,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:18,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:00:18,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:00:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:00:18,796 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:20,332 INFO L93 Difference]: Finished difference Result 642 states and 1273 transitions. [2022-03-15 17:00:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:00:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:20,333 INFO L225 Difference]: With dead ends: 642 [2022-03-15 17:00:20,333 INFO L226 Difference]: Without dead ends: 619 [2022-03-15 17:00:20,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=416, Invalid=3744, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:00:20,334 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:20,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 348 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-15 17:00:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 384. [2022-03-15 17:00:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2022-03-15 17:00:20,338 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2022-03-15 17:00:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:20,339 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2022-03-15 17:00:20,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2022-03-15 17:00:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:20,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:20,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:20,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:20,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:20,540 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:20,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1576557819, now seen corresponding path program 37 times [2022-03-15 17:00:20,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:20,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269378012] [2022-03-15 17:00:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:20,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:20,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:20,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269378012] [2022-03-15 17:00:20,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269378012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:20,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418408316] [2022-03-15 17:00:20,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:20,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:20,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:20,861 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:20,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 17:00:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:21,047 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 [2022-03-15 17:00:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:21,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:21,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:21,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:21,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418408316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:21,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:21,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-03-15 17:00:21,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037117863] [2022-03-15 17:00:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:21,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 17:00:21,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:21,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 17:00:21,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 17:00:21,963 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:23,308 INFO L93 Difference]: Finished difference Result 758 states and 1502 transitions. [2022-03-15 17:00:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:00:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:23,312 INFO L225 Difference]: With dead ends: 758 [2022-03-15 17:00:23,313 INFO L226 Difference]: Without dead ends: 725 [2022-03-15 17:00:23,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=3398, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:00:23,313 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:23,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 408 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-15 17:00:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 381. [2022-03-15 17:00:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-03-15 17:00:23,319 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-03-15 17:00:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:23,319 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-03-15 17:00:23,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-03-15 17:00:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:23,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:23,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:23,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:23,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 17:00:23,523 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash 841891467, now seen corresponding path program 38 times [2022-03-15 17:00:23,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:23,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677823332] [2022-03-15 17:00:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:23,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:23,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677823332] [2022-03-15 17:00:23,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677823332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:23,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499077326] [2022-03-15 17:00:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:23,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:23,906 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:23,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 17:00:23,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:23,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:24,115 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 [2022-03-15 17:00:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:24,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:24,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:24,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:25,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499077326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:25,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:25,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:00:25,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039518377] [2022-03-15 17:00:25,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:25,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:00:25,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:00:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:00:25,028 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:26,468 INFO L93 Difference]: Finished difference Result 770 states and 1514 transitions. [2022-03-15 17:00:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:00:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:26,469 INFO L225 Difference]: With dead ends: 770 [2022-03-15 17:00:26,470 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 17:00:26,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=3894, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:00:26,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 176 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:26,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 392 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 17:00:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2022-03-15 17:00:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2022-03-15 17:00:26,476 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2022-03-15 17:00:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:26,476 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2022-03-15 17:00:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2022-03-15 17:00:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:26,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:26,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:26,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:26,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:26,678 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1723957191, now seen corresponding path program 39 times [2022-03-15 17:00:26,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:26,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043319447] [2022-03-15 17:00:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:27,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:27,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043319447] [2022-03-15 17:00:27,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043319447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:27,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154227154] [2022-03-15 17:00:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:27,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:27,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:27,112 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:27,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 17:00:27,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:00:27,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:27,339 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 [2022-03-15 17:00:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:28,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:28,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:28,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154227154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:28,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:28,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:00:28,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971293227] [2022-03-15 17:00:28,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:00:28,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:00:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:00:28,384 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:29,997 INFO L93 Difference]: Finished difference Result 667 states and 1316 transitions. [2022-03-15 17:00:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:00:29,998 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:29,999 INFO L225 Difference]: With dead ends: 667 [2022-03-15 17:00:29,999 INFO L226 Difference]: Without dead ends: 642 [2022-03-15 17:00:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=440, Invalid=4116, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:00:30,000 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 331 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1357 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-03-15 17:00:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-03-15 17:00:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 393. [2022-03-15 17:00:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-03-15 17:00:30,006 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-03-15 17:00:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:30,006 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-03-15 17:00:30,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-03-15 17:00:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:30,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:30,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:30,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:30,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 17:00:30,208 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1102343387, now seen corresponding path program 40 times [2022-03-15 17:00:30,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:30,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366997658] [2022-03-15 17:00:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:30,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:30,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366997658] [2022-03-15 17:00:30,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366997658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:30,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716424163] [2022-03-15 17:00:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:30,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:30,628 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:30,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 17:00:30,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:30,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:30,859 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 [2022-03-15 17:00:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:31,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:31,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:31,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:31,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716424163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:31,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:31,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:00:31,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812444493] [2022-03-15 17:00:31,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:31,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:00:31,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:00:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:00:31,762 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:33,002 INFO L93 Difference]: Finished difference Result 785 states and 1551 transitions. [2022-03-15 17:00:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:00:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:33,004 INFO L225 Difference]: With dead ends: 785 [2022-03-15 17:00:33,004 INFO L226 Difference]: Without dead ends: 740 [2022-03-15 17:00:33,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=386, Invalid=3396, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:00:33,005 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 154 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:33,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 337 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:00:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-15 17:00:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 385. [2022-03-15 17:00:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2022-03-15 17:00:33,013 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2022-03-15 17:00:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:33,013 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2022-03-15 17:00:33,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2022-03-15 17:00:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:33,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:33,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:33,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:33,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 17:00:33,235 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 845949541, now seen corresponding path program 41 times [2022-03-15 17:00:33,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:33,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915513686] [2022-03-15 17:00:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:33,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:33,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915513686] [2022-03-15 17:00:33,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915513686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:33,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856412715] [2022-03-15 17:00:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:33,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:33,547 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:33,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 17:00:33,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:33,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:00:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:33,734 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 [2022-03-15 17:00:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:34,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:34,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:34,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:34,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856412715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:34,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:34,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-03-15 17:00:34,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331732860] [2022-03-15 17:00:34,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 17:00:34,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 17:00:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 17:00:34,636 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:35,800 INFO L93 Difference]: Finished difference Result 768 states and 1520 transitions. [2022-03-15 17:00:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:00:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:35,801 INFO L225 Difference]: With dead ends: 768 [2022-03-15 17:00:35,802 INFO L226 Difference]: Without dead ends: 735 [2022-03-15 17:00:35,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:00:35,802 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:35,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 364 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:00:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-03-15 17:00:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 383. [2022-03-15 17:00:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2022-03-15 17:00:35,808 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2022-03-15 17:00:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:35,808 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2022-03-15 17:00:35,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2022-03-15 17:00:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:35,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:35,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:35,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:36,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:36,024 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1493559199, now seen corresponding path program 42 times [2022-03-15 17:00:36,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:36,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017159368] [2022-03-15 17:00:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:36,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:36,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017159368] [2022-03-15 17:00:36,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017159368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:36,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945091565] [2022-03-15 17:00:36,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:36,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:36,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:36,412 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:36,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 17:00:36,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:00:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:36,648 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 15 treesize of output 7 [2022-03-15 17:00:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:37,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:37,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:37,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:37,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945091565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:37,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:37,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-03-15 17:00:37,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393227687] [2022-03-15 17:00:37,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:00:37,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:00:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:00:37,731 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:39,004 INFO L93 Difference]: Finished difference Result 766 states and 1516 transitions. [2022-03-15 17:00:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:00:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:39,006 INFO L225 Difference]: With dead ends: 766 [2022-03-15 17:00:39,006 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 17:00:39,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=3770, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:00:39,007 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:39,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 425 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 17:00:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 380. [2022-03-15 17:00:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2022-03-15 17:00:39,014 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2022-03-15 17:00:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:39,014 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2022-03-15 17:00:39,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2022-03-15 17:00:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:39,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:39,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:39,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:39,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 17:00:39,237 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 866178951, now seen corresponding path program 43 times [2022-03-15 17:00:39,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:39,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844594553] [2022-03-15 17:00:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:39,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:39,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844594553] [2022-03-15 17:00:39,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844594553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:39,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67459973] [2022-03-15 17:00:39,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:39,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:39,553 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:39,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 17:00:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:39,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:39,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:00:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:39,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:40,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:40,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:40,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67459973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:40,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:40,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:00:40,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73731756] [2022-03-15 17:00:40,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:40,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:00:40,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:00:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:00:40,454 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:00:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:41,964 INFO L93 Difference]: Finished difference Result 779 states and 1534 transitions. [2022-03-15 17:00:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:00:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:41,972 INFO L225 Difference]: With dead ends: 779 [2022-03-15 17:00:41,972 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 17:00:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=461, Invalid=3699, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:00:41,973 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 354 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 17:00:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 404. [2022-03-15 17:00:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-03-15 17:00:41,981 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-03-15 17:00:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:41,981 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-03-15 17:00:41,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:00:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-03-15 17:00:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:41,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:41,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:42,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 17:00:42,195 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1748244675, now seen corresponding path program 44 times [2022-03-15 17:00:42,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:42,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244897412] [2022-03-15 17:00:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:42,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:42,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244897412] [2022-03-15 17:00:42,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244897412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:42,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559554647] [2022-03-15 17:00:42,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:42,495 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:42,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 17:00:42,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:42,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:42,594 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 [2022-03-15 17:00:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:42,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:43,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:43,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:00:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:43,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559554647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:43,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:43,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-03-15 17:00:43,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307715675] [2022-03-15 17:00:43,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:43,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:00:43,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:00:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:00:43,638 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 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) [2022-03-15 17:00:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:45,344 INFO L93 Difference]: Finished difference Result 694 states and 1369 transitions. [2022-03-15 17:00:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:00:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:45,346 INFO L225 Difference]: With dead ends: 694 [2022-03-15 17:00:45,346 INFO L226 Difference]: Without dead ends: 679 [2022-03-15 17:00:45,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=535, Invalid=4157, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:00:45,346 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:45,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 282 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-15 17:00:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 402. [2022-03-15 17:00:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-03-15 17:00:45,358 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-03-15 17:00:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-03-15 17:00:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 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) [2022-03-15 17:00:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-03-15 17:00:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:45,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:45,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:45,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:45,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:45,581 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1078055903, now seen corresponding path program 45 times [2022-03-15 17:00:45,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:45,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613130055] [2022-03-15 17:00:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:45,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:45,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613130055] [2022-03-15 17:00:45,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613130055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:45,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472844234] [2022-03-15 17:00:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:45,871 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:45,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 17:00:45,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:00:45,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:00:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:45,976 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 [2022-03-15 17:00:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:46,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:46,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:46,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:46,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472844234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:46,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:46,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-03-15 17:00:46,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59859054] [2022-03-15 17:00:46,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:46,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:00:46,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:00:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:00:46,750 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:48,262 INFO L93 Difference]: Finished difference Result 797 states and 1566 transitions. [2022-03-15 17:00:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 17:00:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:48,263 INFO L225 Difference]: With dead ends: 797 [2022-03-15 17:00:48,263 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 17:00:48,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=3451, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:00:48,264 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 193 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:48,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 340 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:00:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 17:00:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 400. [2022-03-15 17:00:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-03-15 17:00:48,271 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-03-15 17:00:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:48,271 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-03-15 17:00:48,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-03-15 17:00:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:48,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:48,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:48,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:48,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:48,472 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash -156353763, now seen corresponding path program 46 times [2022-03-15 17:00:48,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:48,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76603154] [2022-03-15 17:00:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:48,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:48,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:48,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76603154] [2022-03-15 17:00:48,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76603154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:48,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570612826] [2022-03-15 17:00:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:48,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:48,784 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:48,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 17:00:48,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:48,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:00:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:49,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:49,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:49,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:49,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570612826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:49,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:49,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:00:49,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933511051] [2022-03-15 17:00:49,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:49,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:00:49,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:00:49,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:00:49,687 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:00:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:51,132 INFO L93 Difference]: Finished difference Result 782 states and 1544 transitions. [2022-03-15 17:00:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:00:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:51,135 INFO L225 Difference]: With dead ends: 782 [2022-03-15 17:00:51,135 INFO L226 Difference]: Without dead ends: 739 [2022-03-15 17:00:51,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:00:51,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 181 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:51,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 319 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:00:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-15 17:00:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 388. [2022-03-15 17:00:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-03-15 17:00:51,144 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-03-15 17:00:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:51,144 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-03-15 17:00:51,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:00:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-03-15 17:00:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:51,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:51,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:51,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:51,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:51,366 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash -970774179, now seen corresponding path program 47 times [2022-03-15 17:00:51,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:51,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977125989] [2022-03-15 17:00:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:51,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:51,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977125989] [2022-03-15 17:00:51,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977125989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:51,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233748806] [2022-03-15 17:00:51,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:51,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:51,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:51,714 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:51,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 17:00:51,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:00:51,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:00:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:51,848 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 [2022-03-15 17:00:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:52,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:52,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:52,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:52,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233748806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:52,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:52,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-03-15 17:00:52,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346988484] [2022-03-15 17:00:52,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:52,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 17:00:52,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 17:00:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 17:00:52,725 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:00:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:54,189 INFO L93 Difference]: Finished difference Result 793 states and 1557 transitions. [2022-03-15 17:00:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:00:54,189 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) Word has length 30 [2022-03-15 17:00:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:54,191 INFO L225 Difference]: With dead ends: 793 [2022-03-15 17:00:54,191 INFO L226 Difference]: Without dead ends: 784 [2022-03-15 17:00:54,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:00:54,192 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:54,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 297 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-15 17:00:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 405. [2022-03-15 17:00:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-03-15 17:00:54,206 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-03-15 17:00:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:54,206 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-03-15 17:00:54,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:00:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-03-15 17:00:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:54,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:54,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:54,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:54,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 17:00:54,431 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash -88708455, now seen corresponding path program 48 times [2022-03-15 17:00:54,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:54,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056456606] [2022-03-15 17:00:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:54,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:54,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056456606] [2022-03-15 17:00:54,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056456606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:54,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734225850] [2022-03-15 17:00:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:54,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:54,775 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:54,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 17:00:54,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:00:54,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:00:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:54,904 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 [2022-03-15 17:00:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:55,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:55,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:55,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734225850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:55,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:55,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-03-15 17:00:55,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165629218] [2022-03-15 17:00:55,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:55,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 17:00:55,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 17:00:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 17:00:55,857 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:00:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:57,612 INFO L93 Difference]: Finished difference Result 690 states and 1367 transitions. [2022-03-15 17:00:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:00:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) Word has length 30 [2022-03-15 17:00:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:57,613 INFO L225 Difference]: With dead ends: 690 [2022-03-15 17:00:57,613 INFO L226 Difference]: Without dead ends: 675 [2022-03-15 17:00:57,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:00:57,614 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 180 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:57,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 333 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-15 17:00:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 403. [2022-03-15 17:00:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2022-03-15 17:00:57,619 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2022-03-15 17:00:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2022-03-15 17:00:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:00:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2022-03-15 17:00:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:57,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:57,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:57,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:57,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-15 17:00:57,820 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1379958263, now seen corresponding path program 49 times [2022-03-15 17:00:57,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:57,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981056280] [2022-03-15 17:00:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:58,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:58,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981056280] [2022-03-15 17:00:58,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981056280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:58,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010126711] [2022-03-15 17:00:58,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:58,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:58,169 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 17:00:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:58,270 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 [2022-03-15 17:00:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:58,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:58,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:00:58,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:00:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:59,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010126711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:59,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:59,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-03-15 17:00:59,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235068820] [2022-03-15 17:00:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:59,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:00:59,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:00:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:00:59,043 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:00,621 INFO L93 Difference]: Finished difference Result 813 states and 1592 transitions. [2022-03-15 17:01:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 17:01:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:00,623 INFO L225 Difference]: With dead ends: 813 [2022-03-15 17:01:00,623 INFO L226 Difference]: Without dead ends: 776 [2022-03-15 17:01:00,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:01:00,623 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:00,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 320 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:01:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-15 17:01:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 401. [2022-03-15 17:01:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2022-03-15 17:01:00,629 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2022-03-15 17:01:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:00,630 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2022-03-15 17:01:00,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2022-03-15 17:01:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:00,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:00,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:00,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:00,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 17:01:00,831 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1993306893, now seen corresponding path program 50 times [2022-03-15 17:01:00,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:00,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771578300] [2022-03-15 17:01:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:01,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:01,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771578300] [2022-03-15 17:01:01,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771578300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:01,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639142024] [2022-03-15 17:01:01,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:01,135 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:01,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 17:01:01,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:01,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:01,242 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 [2022-03-15 17:01:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:01,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:02,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:02,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:01:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:02,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639142024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:02,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:02,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-03-15 17:01:02,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468585520] [2022-03-15 17:01:02,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:02,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:01:02,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:01:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:01:02,146 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:01:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:03,647 INFO L93 Difference]: Finished difference Result 818 states and 1601 transitions. [2022-03-15 17:01:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:01:03,648 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:03,650 INFO L225 Difference]: With dead ends: 818 [2022-03-15 17:01:03,650 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 17:01:03,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=501, Invalid=3789, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:01:03,651 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 380 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1399 Invalid, 0 Unknown, 211 Unchecked, 0.6s Time] [2022-03-15 17:01:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 17:01:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 389. [2022-03-15 17:01:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-03-15 17:01:03,659 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-03-15 17:01:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:03,659 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-03-15 17:01:03,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:01:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-03-15 17:01:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:03,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:03,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:03,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:03,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:03,887 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1026634883, now seen corresponding path program 51 times [2022-03-15 17:01:03,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:03,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258920510] [2022-03-15 17:01:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:04,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:04,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258920510] [2022-03-15 17:01:04,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258920510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:04,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537537406] [2022-03-15 17:01:04,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:04,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:04,194 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:04,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 17:01:04,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:01:04,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:04,299 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 [2022-03-15 17:01:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:04,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:05,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:05,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:05,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537537406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:05,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:05,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:01:05,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014284325] [2022-03-15 17:01:05,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:05,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:01:05,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:01:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:01:05,161 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:01:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:07,223 INFO L93 Difference]: Finished difference Result 857 states and 1684 transitions. [2022-03-15 17:01:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 17:01:07,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:07,225 INFO L225 Difference]: With dead ends: 857 [2022-03-15 17:01:07,225 INFO L226 Difference]: Without dead ends: 848 [2022-03-15 17:01:07,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=577, Invalid=4679, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:01:07,225 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 208 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:07,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 337 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-15 17:01:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 403. [2022-03-15 17:01:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-03-15 17:01:07,232 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-03-15 17:01:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:07,232 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-03-15 17:01:07,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:01:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-03-15 17:01:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:07,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:07,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:07,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:07,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:07,434 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1908700607, now seen corresponding path program 52 times [2022-03-15 17:01:07,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:07,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748924753] [2022-03-15 17:01:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:07,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:07,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748924753] [2022-03-15 17:01:07,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748924753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:07,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833654968] [2022-03-15 17:01:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:07,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:07,755 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:07,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 17:01:07,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:07,853 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 [2022-03-15 17:01:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:08,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:08,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:08,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:08,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833654968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:08,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:08,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:01:08,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614766427] [2022-03-15 17:01:08,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:08,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:01:08,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:01:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:01:08,755 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:01:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:11,410 INFO L93 Difference]: Finished difference Result 1007 states and 1970 transitions. [2022-03-15 17:01:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 17:01:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:11,411 INFO L225 Difference]: With dead ends: 1007 [2022-03-15 17:01:11,412 INFO L226 Difference]: Without dead ends: 990 [2022-03-15 17:01:11,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=712, Invalid=5294, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 17:01:11,412 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:11,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 383 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1830 Invalid, 0 Unknown, 81 Unchecked, 0.8s Time] [2022-03-15 17:01:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-15 17:01:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 401. [2022-03-15 17:01:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2022-03-15 17:01:11,421 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2022-03-15 17:01:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:11,421 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2022-03-15 17:01:11,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:01:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2022-03-15 17:01:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:11,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:11,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:11,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:11,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 17:01:11,632 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -917599971, now seen corresponding path program 53 times [2022-03-15 17:01:11,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:11,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749554676] [2022-03-15 17:01:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:11,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:11,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749554676] [2022-03-15 17:01:11,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749554676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:11,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006552891] [2022-03-15 17:01:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:11,957 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:11,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 17:01:11,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:01:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:12,051 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 [2022-03-15 17:01:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:12,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:12,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:12,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:12,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006552891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:12,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:12,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-03-15 17:01:12,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980717462] [2022-03-15 17:01:12,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:12,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:01:12,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:01:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:01:12,856 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:15,042 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-03-15 17:01:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 17:01:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:15,043 INFO L225 Difference]: With dead ends: 877 [2022-03-15 17:01:15,043 INFO L226 Difference]: Without dead ends: 816 [2022-03-15 17:01:15,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=648, Invalid=5052, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:01:15,044 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 251 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:15,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 351 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-03-15 17:01:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 400. [2022-03-15 17:01:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2022-03-15 17:01:15,050 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2022-03-15 17:01:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:15,051 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2022-03-15 17:01:15,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2022-03-15 17:01:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:15,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:15,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:15,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:15,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 17:01:15,276 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -28981581, now seen corresponding path program 54 times [2022-03-15 17:01:15,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:15,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492691379] [2022-03-15 17:01:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:15,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:15,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492691379] [2022-03-15 17:01:15,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492691379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:15,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252353227] [2022-03-15 17:01:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:15,613 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:15,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 17:01:15,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:01:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:15,734 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 [2022-03-15 17:01:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:16,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:16,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:16,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:16,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252353227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:16,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:16,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:01:16,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651759427] [2022-03-15 17:01:16,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:16,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:01:16,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:01:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:01:16,649 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:01:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:17,981 INFO L93 Difference]: Finished difference Result 771 states and 1511 transitions. [2022-03-15 17:01:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:01:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:17,982 INFO L225 Difference]: With dead ends: 771 [2022-03-15 17:01:17,982 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 17:01:17,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=3058, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 17:01:17,982 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:17,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 327 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:01:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 17:01:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 402. [2022-03-15 17:01:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2022-03-15 17:01:17,990 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2022-03-15 17:01:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:17,990 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2022-03-15 17:01:17,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:01:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2022-03-15 17:01:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:17,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:17,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:18,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 17:01:18,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:18,195 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash 853084143, now seen corresponding path program 55 times [2022-03-15 17:01:18,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:18,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351884581] [2022-03-15 17:01:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351884581] [2022-03-15 17:01:18,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351884581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183143883] [2022-03-15 17:01:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:18,507 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:18,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 17:01:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:18,612 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 [2022-03-15 17:01:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:19,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:19,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:19,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183143883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:19,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:19,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:01:19,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493255756] [2022-03-15 17:01:19,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:19,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:01:19,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:01:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:01:19,526 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:01:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:20,968 INFO L93 Difference]: Finished difference Result 658 states and 1301 transitions. [2022-03-15 17:01:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:01:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:20,969 INFO L225 Difference]: With dead ends: 658 [2022-03-15 17:01:20,969 INFO L226 Difference]: Without dead ends: 635 [2022-03-15 17:01:20,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 17:01:20,970 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:20,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 270 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:01:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-03-15 17:01:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 392. [2022-03-15 17:01:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-03-15 17:01:20,977 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-03-15 17:01:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-03-15 17:01:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:01:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-03-15 17:01:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:20,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:20,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:20,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:21,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 17:01:21,183 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -24923507, now seen corresponding path program 56 times [2022-03-15 17:01:21,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:21,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623106747] [2022-03-15 17:01:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:21,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:21,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623106747] [2022-03-15 17:01:21,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623106747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:21,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56899141] [2022-03-15 17:01:21,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:21,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:21,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:21,497 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:21,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 17:01:21,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:21,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:21,592 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 15 treesize of output 7 [2022-03-15 17:01:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:21,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:22,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:22,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:22,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56899141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:22,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:22,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:01:22,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814724317] [2022-03-15 17:01:22,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:22,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:01:22,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:01:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:01:22,463 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:23,939 INFO L93 Difference]: Finished difference Result 768 states and 1515 transitions. [2022-03-15 17:01:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:01:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:23,941 INFO L225 Difference]: With dead ends: 768 [2022-03-15 17:01:23,941 INFO L226 Difference]: Without dead ends: 735 [2022-03-15 17:01:23,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=374, Invalid=3166, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:01:23,941 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:23,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 527 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-03-15 17:01:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 388. [2022-03-15 17:01:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-03-15 17:01:23,948 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-03-15 17:01:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:23,949 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-03-15 17:01:23,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-03-15 17:01:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:23,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:23,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:23,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:24,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 17:01:24,163 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:24,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1032283343, now seen corresponding path program 57 times [2022-03-15 17:01:24,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:24,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975696992] [2022-03-15 17:01:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:24,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:24,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975696992] [2022-03-15 17:01:24,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975696992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:24,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540106235] [2022-03-15 17:01:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:24,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:24,498 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 17:01:24,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:01:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:24,660 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 [2022-03-15 17:01:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:24,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:25,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:25,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:25,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540106235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:25,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:25,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:25,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688030323] [2022-03-15 17:01:25,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:25,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:25,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:25,552 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:27,333 INFO L93 Difference]: Finished difference Result 801 states and 1571 transitions. [2022-03-15 17:01:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:01:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:27,334 INFO L225 Difference]: With dead ends: 801 [2022-03-15 17:01:27,334 INFO L226 Difference]: Without dead ends: 792 [2022-03-15 17:01:27,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=503, Invalid=4609, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:01:27,335 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:27,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 432 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-15 17:01:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 406. [2022-03-15 17:01:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-03-15 17:01:27,341 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-03-15 17:01:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:27,341 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-03-15 17:01:27,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-03-15 17:01:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:27,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:27,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:27,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 17:01:27,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 17:01:27,542 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -150217619, now seen corresponding path program 58 times [2022-03-15 17:01:27,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:27,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105060748] [2022-03-15 17:01:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:27,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:27,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105060748] [2022-03-15 17:01:27,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105060748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:27,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130433845] [2022-03-15 17:01:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:27,875 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:27,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 17:01:27,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:28,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:01:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:28,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:28,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:28,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:28,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130433845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:28,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:28,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:28,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93010942] [2022-03-15 17:01:28,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:28,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:28,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:28,947 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:30,940 INFO L93 Difference]: Finished difference Result 698 states and 1381 transitions. [2022-03-15 17:01:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:01:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:30,941 INFO L225 Difference]: With dead ends: 698 [2022-03-15 17:01:30,941 INFO L226 Difference]: Without dead ends: 683 [2022-03-15 17:01:30,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=538, Invalid=4574, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:01:30,942 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:30,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 415 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:01:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-15 17:01:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 404. [2022-03-15 17:01:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-03-15 17:01:30,947 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-03-15 17:01:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:30,947 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-03-15 17:01:30,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-03-15 17:01:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:30,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:30,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:30,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-15 17:01:31,148 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1318449099, now seen corresponding path program 59 times [2022-03-15 17:01:31,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:31,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572020131] [2022-03-15 17:01:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:31,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:31,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572020131] [2022-03-15 17:01:31,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572020131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:31,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490900571] [2022-03-15 17:01:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:31,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:31,464 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:31,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 17:01:31,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:01:31,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:31,623 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 [2022-03-15 17:01:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:32,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:32,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:32,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490900571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:32,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:32,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:01:32,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269766593] [2022-03-15 17:01:32,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:01:32,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:01:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:01:32,554 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:34,645 INFO L93 Difference]: Finished difference Result 828 states and 1621 transitions. [2022-03-15 17:01:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 17:01:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:34,646 INFO L225 Difference]: With dead ends: 828 [2022-03-15 17:01:34,646 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 17:01:34,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=555, Invalid=4847, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:01:34,647 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 168 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 575 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2279 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-03-15 17:01:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 17:01:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 402. [2022-03-15 17:01:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-03-15 17:01:34,653 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-03-15 17:01:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:34,653 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-03-15 17:01:34,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-03-15 17:01:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:34,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:34,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:34,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:34,854 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2054816057, now seen corresponding path program 60 times [2022-03-15 17:01:34,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:34,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32268767] [2022-03-15 17:01:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:35,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:35,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32268767] [2022-03-15 17:01:35,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32268767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:35,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51590764] [2022-03-15 17:01:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:35,248 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:35,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 17:01:35,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:01:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:35,429 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 [2022-03-15 17:01:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:35,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:36,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:36,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:36,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51590764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:36,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:36,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:36,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037055466] [2022-03-15 17:01:36,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:36,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:36,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:36,337 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:37,425 INFO L93 Difference]: Finished difference Result 677 states and 1337 transitions. [2022-03-15 17:01:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:01:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:37,426 INFO L225 Difference]: With dead ends: 677 [2022-03-15 17:01:37,426 INFO L226 Difference]: Without dead ends: 662 [2022-03-15 17:01:37,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=2945, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 17:01:37,427 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:37,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 483 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1314 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-03-15 17:01:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-15 17:01:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 416. [2022-03-15 17:01:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2022-03-15 17:01:37,432 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2022-03-15 17:01:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:37,432 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2022-03-15 17:01:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2022-03-15 17:01:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:37,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:37,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:37,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:37,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:37,633 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1077374521, now seen corresponding path program 61 times [2022-03-15 17:01:37,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:37,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503748155] [2022-03-15 17:01:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:37,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:37,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503748155] [2022-03-15 17:01:37,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503748155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:37,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254819010] [2022-03-15 17:01:37,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:37,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:37,952 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:37,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 17:01:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:38,111 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 [2022-03-15 17:01:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:38,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:38,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:38,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:39,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254819010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:39,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:39,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:39,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729722274] [2022-03-15 17:01:39,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:39,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:39,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:39,019 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:40,660 INFO L93 Difference]: Finished difference Result 795 states and 1565 transitions. [2022-03-15 17:01:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:01:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:40,661 INFO L225 Difference]: With dead ends: 795 [2022-03-15 17:01:40,661 INFO L226 Difference]: Without dead ends: 764 [2022-03-15 17:01:40,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=533, Invalid=4723, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:01:40,662 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:40,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 408 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1484 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-03-15 17:01:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-15 17:01:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 390. [2022-03-15 17:01:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2022-03-15 17:01:40,669 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2022-03-15 17:01:40,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2022-03-15 17:01:40,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2022-03-15 17:01:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:40,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:40,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:40,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:40,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:40,895 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash 965125719, now seen corresponding path program 62 times [2022-03-15 17:01:40,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:40,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710420360] [2022-03-15 17:01:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:41,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:41,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710420360] [2022-03-15 17:01:41,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710420360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:41,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118050259] [2022-03-15 17:01:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:41,212 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:41,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 17:01:41,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:41,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:41,372 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 [2022-03-15 17:01:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:41,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:42,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:42,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:01:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:42,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118050259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:42,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:42,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:01:42,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041515] [2022-03-15 17:01:42,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:42,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:01:42,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:01:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:01:42,394 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:44,959 INFO L93 Difference]: Finished difference Result 952 states and 1864 transitions. [2022-03-15 17:01:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 17:01:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:44,960 INFO L225 Difference]: With dead ends: 952 [2022-03-15 17:01:44,961 INFO L226 Difference]: Without dead ends: 943 [2022-03-15 17:01:44,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=969, Invalid=7221, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 17:01:44,961 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 284 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:44,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 425 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:01:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-15 17:01:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 404. [2022-03-15 17:01:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2022-03-15 17:01:44,968 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2022-03-15 17:01:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2022-03-15 17:01:44,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2022-03-15 17:01:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:44,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:44,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:44,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 17:01:45,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 17:01:45,170 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1847191443, now seen corresponding path program 63 times [2022-03-15 17:01:45,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:45,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311818308] [2022-03-15 17:01:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:45,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:45,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311818308] [2022-03-15 17:01:45,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311818308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:45,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880264327] [2022-03-15 17:01:45,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:45,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:45,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:45,495 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:45,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 17:01:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:01:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:01:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:45,653 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 [2022-03-15 17:01:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:46,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:46,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:46,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880264327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:46,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:46,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:46,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895697520] [2022-03-15 17:01:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:46,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:46,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:46,625 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:49,014 INFO L93 Difference]: Finished difference Result 742 states and 1466 transitions. [2022-03-15 17:01:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 17:01:49,014 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:49,015 INFO L225 Difference]: With dead ends: 742 [2022-03-15 17:01:49,015 INFO L226 Difference]: Without dead ends: 727 [2022-03-15 17:01:49,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=680, Invalid=5482, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:01:49,016 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:49,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 365 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:01:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-03-15 17:01:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 402. [2022-03-15 17:01:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-03-15 17:01:49,021 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-03-15 17:01:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:49,021 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-03-15 17:01:49,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-03-15 17:01:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:49,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:49,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:49,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:49,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:49,222 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash -979109135, now seen corresponding path program 64 times [2022-03-15 17:01:49,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:49,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220949027] [2022-03-15 17:01:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:49,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:49,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:49,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220949027] [2022-03-15 17:01:49,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220949027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:49,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151895059] [2022-03-15 17:01:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:49,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:49,538 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:49,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 17:01:49,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:49,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:49,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:49,735 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 [2022-03-15 17:01:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:50,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:50,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:50,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:50,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151895059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:50,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:50,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:01:50,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946089664] [2022-03-15 17:01:50,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:50,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:01:50,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:01:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:01:50,594 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:52,927 INFO L93 Difference]: Finished difference Result 889 states and 1746 transitions. [2022-03-15 17:01:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 17:01:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:52,928 INFO L225 Difference]: With dead ends: 889 [2022-03-15 17:01:52,928 INFO L226 Difference]: Without dead ends: 828 [2022-03-15 17:01:52,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=668, Invalid=5494, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:01:52,929 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 511 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:01:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-15 17:01:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 401. [2022-03-15 17:01:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2022-03-15 17:01:52,935 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2022-03-15 17:01:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:52,935 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2022-03-15 17:01:52,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2022-03-15 17:01:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:52,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:52,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:52,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 17:01:53,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:53,136 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -90490745, now seen corresponding path program 65 times [2022-03-15 17:01:53,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:53,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679079583] [2022-03-15 17:01:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:53,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:53,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:53,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679079583] [2022-03-15 17:01:53,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679079583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:53,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091310591] [2022-03-15 17:01:53,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:53,476 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 17:01:53,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:53,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:53,639 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 [2022-03-15 17:01:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:53,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:54,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:54,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:54,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091310591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:54,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:54,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:54,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906876167] [2022-03-15 17:01:54,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:54,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:54,558 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:56,019 INFO L93 Difference]: Finished difference Result 773 states and 1515 transitions. [2022-03-15 17:01:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:01:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:56,020 INFO L225 Difference]: With dead ends: 773 [2022-03-15 17:01:56,020 INFO L226 Difference]: Without dead ends: 764 [2022-03-15 17:01:56,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=400, Invalid=3632, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:01:56,020 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:56,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 491 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-15 17:01:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 403. [2022-03-15 17:01:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2022-03-15 17:01:56,026 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2022-03-15 17:01:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2022-03-15 17:01:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2022-03-15 17:01:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:56,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:56,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:56,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:56,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 17:01:56,227 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash 791574979, now seen corresponding path program 66 times [2022-03-15 17:01:56,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:56,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129822645] [2022-03-15 17:01:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:56,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:56,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129822645] [2022-03-15 17:01:56,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129822645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:56,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451723280] [2022-03-15 17:01:56,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:56,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:56,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:56,548 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:56,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 17:01:56,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:01:56,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:56,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:01:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:57,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:57,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:01:57,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:01:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:57,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451723280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:57,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:57,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:01:57,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133109489] [2022-03-15 17:01:57,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:57,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:01:57,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:01:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:01:57,642 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:59,141 INFO L93 Difference]: Finished difference Result 662 states and 1309 transitions. [2022-03-15 17:01:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:01:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:59,142 INFO L225 Difference]: With dead ends: 662 [2022-03-15 17:01:59,142 INFO L226 Difference]: Without dead ends: 639 [2022-03-15 17:01:59,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=3608, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:01:59,142 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:59,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 349 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:01:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-15 17:01:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 393. [2022-03-15 17:01:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2022-03-15 17:01:59,147 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2022-03-15 17:01:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:59,147 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2022-03-15 17:01:59,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2022-03-15 17:01:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:59,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:59,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:59,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 17:01:59,348 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -86432671, now seen corresponding path program 67 times [2022-03-15 17:01:59,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:59,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69150591] [2022-03-15 17:01:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:59,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:59,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69150591] [2022-03-15 17:01:59,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69150591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:59,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948130234] [2022-03-15 17:01:59,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:59,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:59,658 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:59,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 17:01:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:01:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:59,819 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 [2022-03-15 17:02:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:00,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:00,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:00,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:00,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948130234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:00,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:00,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:00,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6761446] [2022-03-15 17:02:00,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:00,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:00,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:00,716 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:02,110 INFO L93 Difference]: Finished difference Result 781 states and 1542 transitions. [2022-03-15 17:02:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:02:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:02,111 INFO L225 Difference]: With dead ends: 781 [2022-03-15 17:02:02,111 INFO L226 Difference]: Without dead ends: 748 [2022-03-15 17:02:02,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:02:02,111 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 145 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:02,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 477 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-15 17:02:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 389. [2022-03-15 17:02:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-03-15 17:02:02,117 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-03-15 17:02:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:02,117 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-03-15 17:02:02,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-03-15 17:02:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:02,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:02,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:02,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:02,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:02,318 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -255678137, now seen corresponding path program 68 times [2022-03-15 17:02:02,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:02,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797436712] [2022-03-15 17:02:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:02,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:02,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797436712] [2022-03-15 17:02:02,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797436712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:02,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332215432] [2022-03-15 17:02:02,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:02,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:02,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:02,628 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:02,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 17:02:02,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:02,788 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 [2022-03-15 17:02:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:03,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:03,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:03,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:02:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:03,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332215432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:03,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:03,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:02:03,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56428730] [2022-03-15 17:02:03,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:03,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:02:03,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:02:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:02:03,791 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:06,393 INFO L93 Difference]: Finished difference Result 928 states and 1820 transitions. [2022-03-15 17:02:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 17:02:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:06,395 INFO L225 Difference]: With dead ends: 928 [2022-03-15 17:02:06,395 INFO L226 Difference]: Without dead ends: 919 [2022-03-15 17:02:06,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1089, Invalid=7653, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 17:02:06,396 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 285 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:06,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 404 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:02:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-15 17:02:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 404. [2022-03-15 17:02:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-03-15 17:02:06,402 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-03-15 17:02:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:06,402 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-03-15 17:02:06,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-03-15 17:02:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:06,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:06,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:06,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 17:02:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:06,604 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 626387587, now seen corresponding path program 69 times [2022-03-15 17:02:06,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:06,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922409967] [2022-03-15 17:02:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:06,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:06,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922409967] [2022-03-15 17:02:06,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922409967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:06,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584258550] [2022-03-15 17:02:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:02:06,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:06,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:06,919 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:06,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 17:02:06,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:02:06,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:06,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:02:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:07,075 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 [2022-03-15 17:02:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:07,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:07,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:07,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:08,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584258550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:08,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:08,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:08,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965886253] [2022-03-15 17:02:08,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:08,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:08,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:08,060 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:10,591 INFO L93 Difference]: Finished difference Result 716 states and 1419 transitions. [2022-03-15 17:02:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 17:02:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:10,592 INFO L225 Difference]: With dead ends: 716 [2022-03-15 17:02:10,593 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 17:02:10,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=728, Invalid=5592, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 17:02:10,593 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:10,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 417 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:02:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 17:02:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 402. [2022-03-15 17:02:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2022-03-15 17:02:10,598 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2022-03-15 17:02:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:10,598 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2022-03-15 17:02:10,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2022-03-15 17:02:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:10,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:10,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-15 17:02:10,799 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2095054305, now seen corresponding path program 70 times [2022-03-15 17:02:10,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:10,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057012440] [2022-03-15 17:02:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:10,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:11,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:11,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057012440] [2022-03-15 17:02:11,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057012440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:11,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303508387] [2022-03-15 17:02:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:11,108 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:11,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 17:02:11,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:11,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:11,264 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 [2022-03-15 17:02:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:11,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:12,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:12,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:12,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303508387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:12,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:12,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:02:12,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264493143] [2022-03-15 17:02:12,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:02:12,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:02:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:02:12,100 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:14,662 INFO L93 Difference]: Finished difference Result 918 states and 1795 transitions. [2022-03-15 17:02:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 17:02:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:14,664 INFO L225 Difference]: With dead ends: 918 [2022-03-15 17:02:14,664 INFO L226 Difference]: Without dead ends: 857 [2022-03-15 17:02:14,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=806, Invalid=6504, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 17:02:14,664 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 278 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:14,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 495 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:02:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-15 17:02:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 401. [2022-03-15 17:02:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2022-03-15 17:02:14,669 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2022-03-15 17:02:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2022-03-15 17:02:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2022-03-15 17:02:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:14,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:14,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:14,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:14,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:14,871 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1311294601, now seen corresponding path program 71 times [2022-03-15 17:02:14,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:14,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411653240] [2022-03-15 17:02:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:14,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:15,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:15,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411653240] [2022-03-15 17:02:15,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411653240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:15,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258545564] [2022-03-15 17:02:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:15,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:15,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:15,194 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:15,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 17:02:15,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:15,358 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 [2022-03-15 17:02:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:16,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:16,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:16,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258545564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:16,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:16,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:16,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143157203] [2022-03-15 17:02:16,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:16,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:16,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:16,289 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:18,055 INFO L93 Difference]: Finished difference Result 781 states and 1533 transitions. [2022-03-15 17:02:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:02:18,055 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:18,056 INFO L225 Difference]: With dead ends: 781 [2022-03-15 17:02:18,056 INFO L226 Difference]: Without dead ends: 772 [2022-03-15 17:02:18,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=487, Invalid=4205, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:02:18,058 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:18,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 518 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:02:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-15 17:02:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 403. [2022-03-15 17:02:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2022-03-15 17:02:18,063 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2022-03-15 17:02:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:18,063 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2022-03-15 17:02:18,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2022-03-15 17:02:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:18,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:18,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:18,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 17:02:18,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:18,264 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash -429228877, now seen corresponding path program 72 times [2022-03-15 17:02:18,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:18,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425679098] [2022-03-15 17:02:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:18,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:18,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425679098] [2022-03-15 17:02:18,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425679098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:18,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121230756] [2022-03-15 17:02:18,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:18,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:18,592 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:18,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 17:02:18,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:02:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:18,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:18,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:02:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:19,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:19,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:19,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121230756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:19,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:19,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:19,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157646952] [2022-03-15 17:02:19,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:19,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:19,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:19,682 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:21,348 INFO L93 Difference]: Finished difference Result 651 states and 1290 transitions. [2022-03-15 17:02:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:02:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:21,349 INFO L225 Difference]: With dead ends: 651 [2022-03-15 17:02:21,349 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 17:02:21,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=4173, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:02:21,349 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 281 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 17:02:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 393. [2022-03-15 17:02:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-03-15 17:02:21,354 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-03-15 17:02:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:21,354 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-03-15 17:02:21,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-03-15 17:02:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:21,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:21,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:21,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:21,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-15 17:02:21,559 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1307236527, now seen corresponding path program 73 times [2022-03-15 17:02:21,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:21,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613047188] [2022-03-15 17:02:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:21,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:21,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:21,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613047188] [2022-03-15 17:02:21,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613047188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:21,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328118441] [2022-03-15 17:02:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:02:21,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:21,861 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:21,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 17:02:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:22,022 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 [2022-03-15 17:02:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:22,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:22,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:22,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:22,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328118441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:22,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:22,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:22,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140433261] [2022-03-15 17:02:22,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:22,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:22,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:22,926 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:24,468 INFO L93 Difference]: Finished difference Result 794 states and 1569 transitions. [2022-03-15 17:02:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:02:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:24,469 INFO L225 Difference]: With dead ends: 794 [2022-03-15 17:02:24,469 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 17:02:24,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=4066, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:02:24,470 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:24,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 416 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 17:02:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2022-03-15 17:02:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2022-03-15 17:02:24,475 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2022-03-15 17:02:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:24,476 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2022-03-15 17:02:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2022-03-15 17:02:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:24,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:24,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:24,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:24,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:24,677 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -821099023, now seen corresponding path program 74 times [2022-03-15 17:02:24,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:24,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954449591] [2022-03-15 17:02:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:25,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:25,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954449591] [2022-03-15 17:02:25,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954449591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:25,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312895629] [2022-03-15 17:02:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:25,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:25,021 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:25,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 17:02:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:25,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:02:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:25,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:26,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:26,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:26,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312895629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:26,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:26,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:26,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885431893] [2022-03-15 17:02:26,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:26,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:26,087 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:27,390 INFO L93 Difference]: Finished difference Result 787 states and 1543 transitions. [2022-03-15 17:02:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:02:27,391 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:27,391 INFO L225 Difference]: With dead ends: 787 [2022-03-15 17:02:27,391 INFO L226 Difference]: Without dead ends: 778 [2022-03-15 17:02:27,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:02:27,392 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 145 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:27,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-15 17:02:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 404. [2022-03-15 17:02:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-03-15 17:02:27,397 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-03-15 17:02:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-03-15 17:02:27,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-03-15 17:02:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:27,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:27,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:27,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:27,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:27,598 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 60966701, now seen corresponding path program 75 times [2022-03-15 17:02:27,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:27,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570386647] [2022-03-15 17:02:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:27,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:27,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570386647] [2022-03-15 17:02:27,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570386647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:27,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301621009] [2022-03-15 17:02:27,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:02:27,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:27,914 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:27,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 17:02:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:02:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:28,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:02:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:28,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:29,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:29,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:29,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301621009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:29,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:29,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:29,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175717447] [2022-03-15 17:02:29,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:29,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:29,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:29,098 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:30,911 INFO L93 Difference]: Finished difference Result 898 states and 1751 transitions. [2022-03-15 17:02:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:02:30,912 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:30,913 INFO L225 Difference]: With dead ends: 898 [2022-03-15 17:02:30,913 INFO L226 Difference]: Without dead ends: 881 [2022-03-15 17:02:30,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=512, Invalid=4458, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:02:30,913 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:30,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 410 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1645 Invalid, 0 Unknown, 79 Unchecked, 0.7s Time] [2022-03-15 17:02:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-03-15 17:02:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 402. [2022-03-15 17:02:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-03-15 17:02:30,919 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-03-15 17:02:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:30,919 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-03-15 17:02:30,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-03-15 17:02:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:30,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:30,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:30,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 17:02:31,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 17:02:31,130 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1529633419, now seen corresponding path program 76 times [2022-03-15 17:02:31,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:31,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562572295] [2022-03-15 17:02:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:31,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:31,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562572295] [2022-03-15 17:02:31,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562572295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:31,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172529630] [2022-03-15 17:02:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:31,448 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:31,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 17:02:31,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:31,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:31,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:31,609 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 [2022-03-15 17:02:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:31,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:32,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:32,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:32,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172529630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:32,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:32,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:02:32,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257194535] [2022-03-15 17:02:32,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:02:32,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:02:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:02:32,466 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:33,630 INFO L93 Difference]: Finished difference Result 802 states and 1580 transitions. [2022-03-15 17:02:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:02:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:33,632 INFO L225 Difference]: With dead ends: 802 [2022-03-15 17:02:33,632 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 17:02:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=3263, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:02:33,632 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 364 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 17:02:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 394. [2022-03-15 17:02:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-03-15 17:02:33,637 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-03-15 17:02:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:33,637 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-03-15 17:02:33,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-03-15 17:02:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:33,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:33,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:33,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:33,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:33,838 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash -817040949, now seen corresponding path program 77 times [2022-03-15 17:02:33,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:33,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833413336] [2022-03-15 17:02:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:34,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:34,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833413336] [2022-03-15 17:02:34,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833413336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:34,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679344779] [2022-03-15 17:02:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:34,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:34,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:34,144 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:34,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 17:02:34,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:34,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:02:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:34,305 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 [2022-03-15 17:02:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:34,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:35,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:35,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:35,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679344779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:35,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:35,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:35,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143706433] [2022-03-15 17:02:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:35,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:35,215 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:36,359 INFO L93 Difference]: Finished difference Result 785 states and 1549 transitions. [2022-03-15 17:02:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 17:02:36,360 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:36,360 INFO L225 Difference]: With dead ends: 785 [2022-03-15 17:02:36,360 INFO L226 Difference]: Without dead ends: 752 [2022-03-15 17:02:36,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=388, Invalid=3394, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:02:36,361 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:36,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 439 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1176 Invalid, 0 Unknown, 323 Unchecked, 0.5s Time] [2022-03-15 17:02:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-15 17:02:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 392. [2022-03-15 17:02:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-03-15 17:02:36,366 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-03-15 17:02:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:36,366 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-03-15 17:02:36,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-03-15 17:02:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:36,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:36,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:36,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 17:02:36,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:36,567 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1138417607, now seen corresponding path program 78 times [2022-03-15 17:02:36,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:36,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530509885] [2022-03-15 17:02:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:36,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:36,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530509885] [2022-03-15 17:02:36,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530509885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:36,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331278378] [2022-03-15 17:02:36,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:36,928 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:36,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 17:02:36,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:02:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:37,116 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 15 treesize of output 7 [2022-03-15 17:02:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:37,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:38,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:38,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:38,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331278378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:38,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:38,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:02:38,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878508612] [2022-03-15 17:02:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:02:38,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:02:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:02:38,088 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:39,493 INFO L93 Difference]: Finished difference Result 783 states and 1545 transitions. [2022-03-15 17:02:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:02:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:39,494 INFO L225 Difference]: With dead ends: 783 [2022-03-15 17:02:39,494 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 17:02:39,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=413, Invalid=3877, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:02:39,495 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:39,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 580 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:02:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 17:02:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 388. [2022-03-15 17:02:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-03-15 17:02:39,500 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-03-15 17:02:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:39,500 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-03-15 17:02:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-03-15 17:02:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:39,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:39,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:39,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:39,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:39,701 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1698717151, now seen corresponding path program 79 times [2022-03-15 17:02:39,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:39,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286518681] [2022-03-15 17:02:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:39,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:40,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:40,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286518681] [2022-03-15 17:02:40,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286518681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:40,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442244234] [2022-03-15 17:02:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:02:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:40,016 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:40,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 17:02:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:40,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:40,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:40,208 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 [2022-03-15 17:02:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:40,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:41,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:41,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:41,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442244234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:41,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:41,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:41,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045738375] [2022-03-15 17:02:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:41,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:41,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:41,158 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:42,781 INFO L93 Difference]: Finished difference Result 800 states and 1571 transitions. [2022-03-15 17:02:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:02:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:42,782 INFO L225 Difference]: With dead ends: 800 [2022-03-15 17:02:42,783 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 17:02:42,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=484, Invalid=4628, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:02:42,783 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:42,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 335 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 17:02:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 409. [2022-03-15 17:02:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2022-03-15 17:02:42,788 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2022-03-15 17:02:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:42,788 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2022-03-15 17:02:42,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2022-03-15 17:02:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:42,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:42,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:42,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-15 17:02:42,990 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash -816651427, now seen corresponding path program 80 times [2022-03-15 17:02:42,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:42,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325030076] [2022-03-15 17:02:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:43,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:43,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325030076] [2022-03-15 17:02:43,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325030076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:43,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540748569] [2022-03-15 17:02:43,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:43,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:43,308 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:43,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 17:02:43,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:43,495 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 [2022-03-15 17:02:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:44,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:44,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:02:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:44,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540748569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:44,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:44,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:02:44,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798208984] [2022-03-15 17:02:44,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:02:44,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:02:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:02:44,523 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:46,672 INFO L93 Difference]: Finished difference Result 718 states and 1411 transitions. [2022-03-15 17:02:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 17:02:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:46,673 INFO L225 Difference]: With dead ends: 718 [2022-03-15 17:02:46,673 INFO L226 Difference]: Without dead ends: 703 [2022-03-15 17:02:46,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=5381, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 17:02:46,674 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:46,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 450 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:02:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-03-15 17:02:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 407. [2022-03-15 17:02:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-03-15 17:02:46,678 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-03-15 17:02:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:46,678 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-03-15 17:02:46,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-03-15 17:02:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:46,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:46,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:46,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:46,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:46,880 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 652015291, now seen corresponding path program 81 times [2022-03-15 17:02:46,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:46,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412998608] [2022-03-15 17:02:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:47,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:47,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412998608] [2022-03-15 17:02:47,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412998608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:47,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403613536] [2022-03-15 17:02:47,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:02:47,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:47,280 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 17:02:47,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:02:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:02:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:47,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:02:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:47,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:48,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:48,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:48,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403613536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:48,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:48,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:02:48,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805064806] [2022-03-15 17:02:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:02:48,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:48,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:02:48,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:02:48,414 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:50,133 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-03-15 17:02:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 17:02:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:50,135 INFO L225 Difference]: With dead ends: 825 [2022-03-15 17:02:50,135 INFO L226 Difference]: Without dead ends: 788 [2022-03-15 17:02:50,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=497, Invalid=4473, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:02:50,135 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 204 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 408 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1558 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2022-03-15 17:02:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-15 17:02:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 405. [2022-03-15 17:02:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-03-15 17:02:50,142 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-03-15 17:02:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:50,142 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-03-15 17:02:50,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-03-15 17:02:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:50,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:50,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:50,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 17:02:50,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:50,347 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1573717431, now seen corresponding path program 82 times [2022-03-15 17:02:50,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:50,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960835999] [2022-03-15 17:02:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:50,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:50,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960835999] [2022-03-15 17:02:50,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960835999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:50,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032656623] [2022-03-15 17:02:50,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:50,659 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:50,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 17:02:50,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:02:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:50,848 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 [2022-03-15 17:02:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:51,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:51,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:51,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:51,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032656623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:51,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:51,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:51,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16793032] [2022-03-15 17:02:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:51,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:51,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:51,712 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:53,382 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-03-15 17:02:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:02:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:53,383 INFO L225 Difference]: With dead ends: 804 [2022-03-15 17:02:53,383 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 17:02:53,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 17:02:53,384 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:53,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 488 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:02:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 17:02:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 393. [2022-03-15 17:02:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-03-15 17:02:53,389 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-03-15 17:02:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:53,389 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-03-15 17:02:53,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-03-15 17:02:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:53,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:53,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:53,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:53,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:53,590 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:53,591 INFO L85 PathProgramCache]: Analyzing trace with hash 298691911, now seen corresponding path program 83 times [2022-03-15 17:02:53,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:53,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500609173] [2022-03-15 17:02:53,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:53,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:53,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:53,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500609173] [2022-03-15 17:02:53,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500609173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:53,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177919546] [2022-03-15 17:02:53,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:53,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:53,912 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 17:02:53,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:02:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:02:53,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:54,117 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 [2022-03-15 17:02:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:54,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:54,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:54,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:55,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177919546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:55,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:55,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:55,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784140036] [2022-03-15 17:02:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:55,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:55,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:55,011 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:57,227 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-03-15 17:02:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 17:02:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:57,228 INFO L225 Difference]: With dead ends: 877 [2022-03-15 17:02:57,228 INFO L226 Difference]: Without dead ends: 868 [2022-03-15 17:02:57,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=611, Invalid=5551, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:02:57,229 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:57,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 450 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:02:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-03-15 17:02:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 407. [2022-03-15 17:02:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2022-03-15 17:02:57,234 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2022-03-15 17:02:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:57,234 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2022-03-15 17:02:57,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2022-03-15 17:02:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:57,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:57,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:57,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:57,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:57,436 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1180757635, now seen corresponding path program 84 times [2022-03-15 17:02:57,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:57,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448554339] [2022-03-15 17:02:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:57,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:57,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:57,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448554339] [2022-03-15 17:02:57,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448554339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:57,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670802119] [2022-03-15 17:02:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:57,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:57,772 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:57,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 17:02:57,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:02:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:02:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:57,977 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 [2022-03-15 17:02:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:58,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:58,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:02:58,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:02:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:58,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670802119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:58,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:58,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:02:58,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546951291] [2022-03-15 17:02:58,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:58,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:02:58,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:02:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:02:58,933 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:01,307 INFO L93 Difference]: Finished difference Result 746 states and 1474 transitions. [2022-03-15 17:03:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 17:03:01,307 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:01,308 INFO L225 Difference]: With dead ends: 746 [2022-03-15 17:03:01,308 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 17:03:01,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=658, Invalid=5504, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:03:01,308 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:01,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 378 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:03:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 17:03:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 405. [2022-03-15 17:03:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-03-15 17:03:01,318 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-03-15 17:03:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:01,318 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-03-15 17:03:01,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-03-15 17:03:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:01,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:01,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:01,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 17:03:01,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 17:03:01,520 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1645542943, now seen corresponding path program 85 times [2022-03-15 17:03:01,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:01,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420288190] [2022-03-15 17:03:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:01,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:01,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420288190] [2022-03-15 17:03:01,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420288190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:01,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320080422] [2022-03-15 17:03:01,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:03:01,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:01,836 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:01,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 17:03:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:01,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:02,022 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 [2022-03-15 17:03:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:02,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:02,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:02,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:02,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320080422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:02,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:02,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:03:02,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332645260] [2022-03-15 17:03:02,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:02,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:03:02,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:03:02,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:03:02,992 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:05,113 INFO L93 Difference]: Finished difference Result 893 states and 1754 transitions. [2022-03-15 17:03:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 17:03:05,114 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:05,115 INFO L225 Difference]: With dead ends: 893 [2022-03-15 17:03:05,115 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 17:03:05,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=632, Invalid=5374, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 17:03:05,115 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 229 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:05,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 426 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1746 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-03-15 17:03:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 17:03:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 404. [2022-03-15 17:03:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2022-03-15 17:03:05,121 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2022-03-15 17:03:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:05,121 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2022-03-15 17:03:05,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2022-03-15 17:03:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:05,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:05,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:05,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 17:03:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 17:03:05,347 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -756924553, now seen corresponding path program 86 times [2022-03-15 17:03:05,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:05,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19072875] [2022-03-15 17:03:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:05,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:05,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19072875] [2022-03-15 17:03:05,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19072875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:05,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598456682] [2022-03-15 17:03:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:03:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:05,666 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:05,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 17:03:05,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:05,875 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 [2022-03-15 17:03:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:06,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:06,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:06,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:06,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598456682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:06,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:06,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:06,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378328904] [2022-03-15 17:03:06,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:06,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:06,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:06,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:06,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:06,831 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:08,184 INFO L93 Difference]: Finished difference Result 778 states and 1525 transitions. [2022-03-15 17:03:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:03:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:08,186 INFO L225 Difference]: With dead ends: 778 [2022-03-15 17:03:08,186 INFO L226 Difference]: Without dead ends: 769 [2022-03-15 17:03:08,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=3647, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:03:08,186 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 138 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:08,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 411 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:03:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-03-15 17:03:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 406. [2022-03-15 17:03:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2022-03-15 17:03:08,192 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2022-03-15 17:03:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:08,192 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2022-03-15 17:03:08,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2022-03-15 17:03:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:08,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:08,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:08,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 17:03:08,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:08,395 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:08,395 INFO L85 PathProgramCache]: Analyzing trace with hash 125141171, now seen corresponding path program 87 times [2022-03-15 17:03:08,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:08,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263386281] [2022-03-15 17:03:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:08,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:08,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:08,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263386281] [2022-03-15 17:03:08,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263386281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:08,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852386973] [2022-03-15 17:03:08,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:08,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:08,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:08,728 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 17:03:08,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:03:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:08,923 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 [2022-03-15 17:03:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:09,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:09,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:09,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852386973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:09,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:09,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:09,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122245318] [2022-03-15 17:03:09,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:09,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:09,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:09,940 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:11,496 INFO L93 Difference]: Finished difference Result 666 states and 1317 transitions. [2022-03-15 17:03:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:03:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:11,497 INFO L225 Difference]: With dead ends: 666 [2022-03-15 17:03:11,497 INFO L226 Difference]: Without dead ends: 643 [2022-03-15 17:03:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=3623, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:03:11,498 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 422 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-03-15 17:03:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 396. [2022-03-15 17:03:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-03-15 17:03:11,503 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-03-15 17:03:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:11,503 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-03-15 17:03:11,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-03-15 17:03:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:11,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:11,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:11,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 17:03:11,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:11,704 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash -752866479, now seen corresponding path program 88 times [2022-03-15 17:03:11,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:11,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525404450] [2022-03-15 17:03:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:12,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:12,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525404450] [2022-03-15 17:03:12,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525404450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:12,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856447275] [2022-03-15 17:03:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:12,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:12,015 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:12,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 17:03:12,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:12,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:12,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:12,209 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 [2022-03-15 17:03:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:12,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:13,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:13,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:13,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856447275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:13,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:13,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:13,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873683438] [2022-03-15 17:03:13,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:13,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:13,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:13,109 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:14,333 INFO L93 Difference]: Finished difference Result 790 states and 1555 transitions. [2022-03-15 17:03:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:03:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:14,334 INFO L225 Difference]: With dead ends: 790 [2022-03-15 17:03:14,334 INFO L226 Difference]: Without dead ends: 753 [2022-03-15 17:03:14,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=3517, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:03:14,335 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:14,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 383 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1246 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-03-15 17:03:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-03-15 17:03:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 392. [2022-03-15 17:03:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2022-03-15 17:03:14,340 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2022-03-15 17:03:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:14,340 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2022-03-15 17:03:14,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2022-03-15 17:03:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:14,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:14,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:14,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 17:03:14,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 17:03:14,541 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash -922111945, now seen corresponding path program 89 times [2022-03-15 17:03:14,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:14,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224978707] [2022-03-15 17:03:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:14,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:14,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224978707] [2022-03-15 17:03:14,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224978707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:14,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164774493] [2022-03-15 17:03:14,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:14,852 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:14,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 17:03:14,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:03:14,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:03:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:15,039 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 [2022-03-15 17:03:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:15,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:15,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:15,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164774493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:15,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:15,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:15,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524951567] [2022-03-15 17:03:15,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:15,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:15,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:15,930 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:18,185 INFO L93 Difference]: Finished difference Result 867 states and 1705 transitions. [2022-03-15 17:03:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 17:03:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:18,186 INFO L225 Difference]: With dead ends: 867 [2022-03-15 17:03:18,186 INFO L226 Difference]: Without dead ends: 858 [2022-03-15 17:03:18,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=692, Invalid=5788, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 17:03:18,187 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:18,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 390 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:03:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-15 17:03:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 407. [2022-03-15 17:03:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-03-15 17:03:18,193 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-03-15 17:03:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:18,193 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-03-15 17:03:18,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-03-15 17:03:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:18,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:18,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:18,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:18,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:18,394 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -40046221, now seen corresponding path program 90 times [2022-03-15 17:03:18,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:18,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054915410] [2022-03-15 17:03:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:18,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:18,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054915410] [2022-03-15 17:03:18,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054915410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:18,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328875539] [2022-03-15 17:03:18,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:03:18,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:18,705 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 17:03:18,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:03:18,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:03:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:18,890 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 [2022-03-15 17:03:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:19,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:19,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:19,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:19,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328875539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:19,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:19,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:19,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095392009] [2022-03-15 17:03:19,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:19,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:19,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:19,782 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:22,180 INFO L93 Difference]: Finished difference Result 724 states and 1435 transitions. [2022-03-15 17:03:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 17:03:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:22,181 INFO L225 Difference]: With dead ends: 724 [2022-03-15 17:03:22,181 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 17:03:22,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=706, Invalid=5614, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 17:03:22,182 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:22,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:03:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 17:03:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 405. [2022-03-15 17:03:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2022-03-15 17:03:22,187 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2022-03-15 17:03:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:22,187 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2022-03-15 17:03:22,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2022-03-15 17:03:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:22,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:22,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:22,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:22,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 17:03:22,388 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1428620497, now seen corresponding path program 91 times [2022-03-15 17:03:22,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:22,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921356072] [2022-03-15 17:03:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:22,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:22,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921356072] [2022-03-15 17:03:22,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921356072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:22,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562635015] [2022-03-15 17:03:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:03:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:22,702 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:22,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 17:03:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:22,886 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 [2022-03-15 17:03:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:23,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:23,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:23,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562635015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:23,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:23,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:03:23,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337642895] [2022-03-15 17:03:23,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:03:23,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:03:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:03:23,709 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:26,260 INFO L93 Difference]: Finished difference Result 922 states and 1803 transitions. [2022-03-15 17:03:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 17:03:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:26,261 INFO L225 Difference]: With dead ends: 922 [2022-03-15 17:03:26,262 INFO L226 Difference]: Without dead ends: 861 [2022-03-15 17:03:26,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=768, Invalid=6372, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 17:03:26,262 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 228 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:26,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 533 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:03:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-03-15 17:03:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 404. [2022-03-15 17:03:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2022-03-15 17:03:26,274 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2022-03-15 17:03:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:26,274 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2022-03-15 17:03:26,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2022-03-15 17:03:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:26,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:26,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:26,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:26,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 17:03:26,476 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1977728409, now seen corresponding path program 92 times [2022-03-15 17:03:26,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:26,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053796373] [2022-03-15 17:03:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:26,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:26,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053796373] [2022-03-15 17:03:26,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053796373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:26,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935704813] [2022-03-15 17:03:26,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:03:26,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:26,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:26,791 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:26,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 17:03:26,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:26,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:26,981 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 [2022-03-15 17:03:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:27,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:27,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:27,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:27,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935704813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:27,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:27,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:27,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897335098] [2022-03-15 17:03:27,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:27,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:27,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:27,867 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:29,462 INFO L93 Difference]: Finished difference Result 786 states and 1543 transitions. [2022-03-15 17:03:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:03:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:29,463 INFO L225 Difference]: With dead ends: 786 [2022-03-15 17:03:29,463 INFO L226 Difference]: Without dead ends: 777 [2022-03-15 17:03:29,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=4220, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:03:29,464 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:29,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 399 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-03-15 17:03:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 406. [2022-03-15 17:03:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2022-03-15 17:03:29,469 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2022-03-15 17:03:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:29,469 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2022-03-15 17:03:29,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2022-03-15 17:03:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:29,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:29,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:29,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-15 17:03:29,670 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1095662685, now seen corresponding path program 93 times [2022-03-15 17:03:29,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:29,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044415140] [2022-03-15 17:03:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:29,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:29,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:29,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044415140] [2022-03-15 17:03:29,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044415140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:29,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176447899] [2022-03-15 17:03:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:30,001 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:30,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 17:03:30,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:03:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:30,191 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 [2022-03-15 17:03:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:30,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:30,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:31,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:31,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176447899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:31,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:31,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:31,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807598018] [2022-03-15 17:03:31,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:31,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:31,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:31,082 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:32,889 INFO L93 Difference]: Finished difference Result 659 states and 1306 transitions. [2022-03-15 17:03:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:03:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:32,890 INFO L225 Difference]: With dead ends: 659 [2022-03-15 17:03:32,890 INFO L226 Difference]: Without dead ends: 636 [2022-03-15 17:03:32,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=504, Invalid=4188, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:03:32,891 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:32,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 396 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-15 17:03:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 396. [2022-03-15 17:03:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2022-03-15 17:03:32,895 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2022-03-15 17:03:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:32,895 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2022-03-15 17:03:32,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2022-03-15 17:03:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:32,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:32,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:32,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 17:03:33,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:33,098 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1973670335, now seen corresponding path program 94 times [2022-03-15 17:03:33,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:33,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545113516] [2022-03-15 17:03:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:33,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:33,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545113516] [2022-03-15 17:03:33,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545113516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:33,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577264950] [2022-03-15 17:03:33,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:33,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:33,408 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:33,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 17:03:33,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:33,598 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 [2022-03-15 17:03:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:33,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:34,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:34,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:34,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577264950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:34,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:34,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:34,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365048737] [2022-03-15 17:03:34,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:34,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:34,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:34,453 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:36,101 INFO L93 Difference]: Finished difference Result 799 states and 1579 transitions. [2022-03-15 17:03:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:03:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:36,103 INFO L225 Difference]: With dead ends: 799 [2022-03-15 17:03:36,103 INFO L226 Difference]: Without dead ends: 766 [2022-03-15 17:03:36,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=4081, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:03:36,103 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:36,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 464 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-03-15 17:03:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 393. [2022-03-15 17:03:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2022-03-15 17:03:36,109 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2022-03-15 17:03:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:36,109 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2022-03-15 17:03:36,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2022-03-15 17:03:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:36,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:36,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:36,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:36,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:36,311 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1487532831, now seen corresponding path program 95 times [2022-03-15 17:03:36,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:36,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956386668] [2022-03-15 17:03:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:36,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:36,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:36,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956386668] [2022-03-15 17:03:36,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956386668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:36,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416336736] [2022-03-15 17:03:36,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:36,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:36,624 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:36,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 17:03:36,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:36,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:36,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:36,818 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 [2022-03-15 17:03:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:37,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:37,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:37,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416336736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:37,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:37,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:37,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066676057] [2022-03-15 17:03:37,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:37,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:37,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:37,700 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:39,134 INFO L93 Difference]: Finished difference Result 792 states and 1553 transitions. [2022-03-15 17:03:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:03:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:39,135 INFO L225 Difference]: With dead ends: 792 [2022-03-15 17:03:39,135 INFO L226 Difference]: Without dead ends: 783 [2022-03-15 17:03:39,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:03:39,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:39,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 483 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-15 17:03:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 407. [2022-03-15 17:03:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-03-15 17:03:39,141 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-03-15 17:03:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:39,141 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-03-15 17:03:39,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-03-15 17:03:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:39,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:39,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:39,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 17:03:39,342 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -605467107, now seen corresponding path program 96 times [2022-03-15 17:03:39,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:39,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098638835] [2022-03-15 17:03:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:39,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:39,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098638835] [2022-03-15 17:03:39,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098638835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:39,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91290379] [2022-03-15 17:03:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:03:39,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:39,662 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:39,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 17:03:39,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:03:39,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:39,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:39,864 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 [2022-03-15 17:03:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:40,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:40,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:40,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:40,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91290379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:40,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:40,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:40,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507698565] [2022-03-15 17:03:40,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:40,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:40,771 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:42,283 INFO L93 Difference]: Finished difference Result 682 states and 1351 transitions. [2022-03-15 17:03:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:03:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:42,284 INFO L225 Difference]: With dead ends: 682 [2022-03-15 17:03:42,284 INFO L226 Difference]: Without dead ends: 667 [2022-03-15 17:03:42,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:03:42,284 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:42,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 391 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-15 17:03:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 405. [2022-03-15 17:03:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-03-15 17:03:42,289 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-03-15 17:03:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:42,289 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-03-15 17:03:42,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-03-15 17:03:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:42,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:42,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:42,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 17:03:42,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:42,490 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 863199611, now seen corresponding path program 97 times [2022-03-15 17:03:42,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:42,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097020690] [2022-03-15 17:03:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:42,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:42,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097020690] [2022-03-15 17:03:42,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097020690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:42,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306265588] [2022-03-15 17:03:42,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:03:42,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:42,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:42,804 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:42,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 17:03:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:42,991 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 [2022-03-15 17:03:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:43,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:43,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:43,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:43,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306265588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:43,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:43,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:03:43,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362266167] [2022-03-15 17:03:43,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:43,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:03:43,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:03:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:03:43,876 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:45,202 INFO L93 Difference]: Finished difference Result 807 states and 1590 transitions. [2022-03-15 17:03:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:03:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:45,203 INFO L225 Difference]: With dead ends: 807 [2022-03-15 17:03:45,203 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 17:03:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=382, Invalid=3278, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:03:45,204 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:45,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 546 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1782 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-03-15 17:03:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 17:03:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 397. [2022-03-15 17:03:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-03-15 17:03:45,209 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-03-15 17:03:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:45,209 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-03-15 17:03:45,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-03-15 17:03:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:45,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:45,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:45,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:45,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:45,410 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1483474757, now seen corresponding path program 98 times [2022-03-15 17:03:45,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:45,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015408144] [2022-03-15 17:03:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:45,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:45,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:45,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015408144] [2022-03-15 17:03:45,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015408144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:45,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468173764] [2022-03-15 17:03:45,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:03:45,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:45,720 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:45,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 17:03:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:45,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:03:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:46,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:46,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:46,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:46,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468173764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:46,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:46,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:46,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457587386] [2022-03-15 17:03:46,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:46,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:46,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:46,774 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:47,891 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-03-15 17:03:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:03:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:47,892 INFO L225 Difference]: With dead ends: 790 [2022-03-15 17:03:47,892 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 17:03:47,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:03:47,892 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:47,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 337 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:03:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 17:03:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 395. [2022-03-15 17:03:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-03-15 17:03:47,897 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-03-15 17:03:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:47,897 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-03-15 17:03:47,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-03-15 17:03:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:47,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:47,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:47,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:48,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:48,098 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash 471983799, now seen corresponding path program 99 times [2022-03-15 17:03:48,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:48,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420122889] [2022-03-15 17:03:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:48,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:48,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420122889] [2022-03-15 17:03:48,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420122889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:48,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280343289] [2022-03-15 17:03:48,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:48,477 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:48,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 17:03:48,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:03:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:48,669 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 15 treesize of output 7 [2022-03-15 17:03:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:49,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:49,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:49,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:49,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280343289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:49,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:49,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:03:49,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922124564] [2022-03-15 17:03:49,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:03:49,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:03:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:03:49,605 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:50,863 INFO L93 Difference]: Finished difference Result 788 states and 1555 transitions. [2022-03-15 17:03:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:03:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:50,864 INFO L225 Difference]: With dead ends: 788 [2022-03-15 17:03:50,864 INFO L226 Difference]: Without dead ends: 752 [2022-03-15 17:03:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=398, Invalid=3892, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:03:50,865 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 422 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:03:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-15 17:03:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 391. [2022-03-15 17:03:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2022-03-15 17:03:50,870 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2022-03-15 17:03:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:50,870 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2022-03-15 17:03:50,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2022-03-15 17:03:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:50,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:50,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:50,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:51,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 17:03:51,071 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 758969475, now seen corresponding path program 100 times [2022-03-15 17:03:51,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:51,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265349044] [2022-03-15 17:03:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:51,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:51,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265349044] [2022-03-15 17:03:51,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265349044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:51,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693514185] [2022-03-15 17:03:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:51,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:51,390 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:51,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 17:03:51,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:03:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:51,614 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 [2022-03-15 17:03:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:51,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:52,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:52,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:52,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693514185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:52,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:52,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:52,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377320443] [2022-03-15 17:03:52,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:52,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:52,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:52,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:52,472 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:55,262 INFO L93 Difference]: Finished difference Result 989 states and 1946 transitions. [2022-03-15 17:03:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 17:03:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:55,264 INFO L225 Difference]: With dead ends: 989 [2022-03-15 17:03:55,264 INFO L226 Difference]: Without dead ends: 980 [2022-03-15 17:03:55,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=801, Invalid=6681, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 17:03:55,265 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 285 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:55,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 494 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:03:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-03-15 17:03:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 409. [2022-03-15 17:03:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2022-03-15 17:03:55,270 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2022-03-15 17:03:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2022-03-15 17:03:55,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2022-03-15 17:03:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:55,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:55,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:55,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:55,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 17:03:55,472 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1641035199, now seen corresponding path program 101 times [2022-03-15 17:03:55,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:55,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552718836] [2022-03-15 17:03:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:55,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:55,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552718836] [2022-03-15 17:03:55,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552718836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:55,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199372006] [2022-03-15 17:03:55,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:55,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:55,790 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:55,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 17:03:55,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:03:55,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:55,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:03:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:56,018 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 [2022-03-15 17:03:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:56,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:56,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:03:56,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:03:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:56,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199372006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:56,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:56,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:03:56,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914717080] [2022-03-15 17:03:56,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:03:56,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:03:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:03:56,978 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:59,999 INFO L93 Difference]: Finished difference Result 824 states and 1632 transitions. [2022-03-15 17:04:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 17:04:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:00,001 INFO L225 Difference]: With dead ends: 824 [2022-03-15 17:04:00,001 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 17:04:00,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=819, Invalid=6491, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 17:04:00,001 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:00,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 473 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:04:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 17:04:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 407. [2022-03-15 17:04:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2022-03-15 17:04:00,006 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2022-03-15 17:04:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:00,007 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2022-03-15 17:04:00,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2022-03-15 17:04:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:00,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:00,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:00,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:00,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 17:04:00,208 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1185265379, now seen corresponding path program 102 times [2022-03-15 17:04:00,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:00,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264691424] [2022-03-15 17:04:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:00,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:00,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264691424] [2022-03-15 17:04:00,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264691424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:00,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617140640] [2022-03-15 17:04:00,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:04:00,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:00,520 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:00,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 17:04:00,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:04:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:04:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:00,730 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 [2022-03-15 17:04:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:01,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:01,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:01,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:01,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617140640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:01,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:01,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:04:01,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113907733] [2022-03-15 17:04:01,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:01,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:04:01,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:04:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:04:01,626 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:04,545 INFO L93 Difference]: Finished difference Result 1053 states and 2058 transitions. [2022-03-15 17:04:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 17:04:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:04,547 INFO L225 Difference]: With dead ends: 1053 [2022-03-15 17:04:04,547 INFO L226 Difference]: Without dead ends: 992 [2022-03-15 17:04:04,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=877, Invalid=7313, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 17:04:04,548 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:04,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 506 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2227 Invalid, 0 Unknown, 84 Unchecked, 0.9s Time] [2022-03-15 17:04:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-03-15 17:04:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 406. [2022-03-15 17:04:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-03-15 17:04:04,554 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-03-15 17:04:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:04,554 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-03-15 17:04:04,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-03-15 17:04:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:04,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:04,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:04,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:04,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 17:04:04,755 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -296646989, now seen corresponding path program 103 times [2022-03-15 17:04:04,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:04,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547299267] [2022-03-15 17:04:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:05,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:05,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547299267] [2022-03-15 17:04:05,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547299267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:05,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201029500] [2022-03-15 17:04:05,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:05,069 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 17:04:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:05,292 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 [2022-03-15 17:04:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:06,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:06,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:06,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201029500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:06,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:06,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:06,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727915344] [2022-03-15 17:04:06,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:06,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:06,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:06,210 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:08,131 INFO L93 Difference]: Finished difference Result 839 states and 1652 transitions. [2022-03-15 17:04:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 17:04:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:08,137 INFO L225 Difference]: With dead ends: 839 [2022-03-15 17:04:08,137 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 17:04:08,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=535, Invalid=4867, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:04:08,137 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:08,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 402 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:04:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 17:04:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 408. [2022-03-15 17:04:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2022-03-15 17:04:08,142 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2022-03-15 17:04:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:08,143 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2022-03-15 17:04:08,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2022-03-15 17:04:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:08,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:08,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:08,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:08,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:08,344 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash 585418735, now seen corresponding path program 104 times [2022-03-15 17:04:08,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:08,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590933380] [2022-03-15 17:04:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:08,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:08,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:08,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590933380] [2022-03-15 17:04:08,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590933380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:08,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322576723] [2022-03-15 17:04:08,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:04:08,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:08,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:08,682 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 17:04:08,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:08,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:08,904 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 [2022-03-15 17:04:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:09,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:09,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:09,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:09,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322576723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:09,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:09,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:09,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286840669] [2022-03-15 17:04:09,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:09,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:09,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:09,790 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:11,819 INFO L93 Difference]: Finished difference Result 706 states and 1396 transitions. [2022-03-15 17:04:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 17:04:11,819 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:11,820 INFO L225 Difference]: With dead ends: 706 [2022-03-15 17:04:11,820 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 17:04:11,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=589, Invalid=5111, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:04:11,821 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 241 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:11,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 304 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1490 Invalid, 0 Unknown, 149 Unchecked, 0.6s Time] [2022-03-15 17:04:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 17:04:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 398. [2022-03-15 17:04:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2022-03-15 17:04:11,825 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2022-03-15 17:04:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:11,826 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2022-03-15 17:04:11,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2022-03-15 17:04:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:11,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:11,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:11,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:12,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:12,027 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash -292588915, now seen corresponding path program 105 times [2022-03-15 17:04:12,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:12,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884515232] [2022-03-15 17:04:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:12,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:12,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884515232] [2022-03-15 17:04:12,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884515232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:12,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902249127] [2022-03-15 17:04:12,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:04:12,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:12,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:12,340 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:12,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 17:04:12,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:04:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:12,565 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 15 treesize of output 7 [2022-03-15 17:04:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:12,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:13,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:13,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:13,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902249127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:13,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:13,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:13,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18797388] [2022-03-15 17:04:13,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:13,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:13,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:13,411 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:15,564 INFO L93 Difference]: Finished difference Result 852 states and 1688 transitions. [2022-03-15 17:04:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:04:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:15,566 INFO L225 Difference]: With dead ends: 852 [2022-03-15 17:04:15,566 INFO L226 Difference]: Without dead ends: 819 [2022-03-15 17:04:15,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=536, Invalid=4720, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:04:15,566 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:15,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 579 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-03-15 17:04:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 395. [2022-03-15 17:04:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2022-03-15 17:04:15,572 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2022-03-15 17:04:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2022-03-15 17:04:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2022-03-15 17:04:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:15,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:15,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:15,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:15,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-15 17:04:15,773 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:15,773 INFO L85 PathProgramCache]: Analyzing trace with hash 193548589, now seen corresponding path program 106 times [2022-03-15 17:04:15,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:15,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48980140] [2022-03-15 17:04:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:15,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:16,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:16,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48980140] [2022-03-15 17:04:16,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48980140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:16,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370270922] [2022-03-15 17:04:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:04:16,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:16,085 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:16,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 17:04:16,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:04:16,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:16,300 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 [2022-03-15 17:04:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:16,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:17,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:17,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:17,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370270922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:17,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:17,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:17,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300883976] [2022-03-15 17:04:17,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:17,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:17,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:17,137 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:19,080 INFO L93 Difference]: Finished difference Result 836 states and 1644 transitions. [2022-03-15 17:04:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:04:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:19,082 INFO L225 Difference]: With dead ends: 836 [2022-03-15 17:04:19,082 INFO L226 Difference]: Without dead ends: 827 [2022-03-15 17:04:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=463, Invalid=4649, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:04:19,082 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 161 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:19,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 547 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-03-15 17:04:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 409. [2022-03-15 17:04:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2022-03-15 17:04:19,088 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2022-03-15 17:04:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:19,088 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2022-03-15 17:04:19,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2022-03-15 17:04:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:19,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:19,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:19,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:19,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:19,289 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1075614313, now seen corresponding path program 107 times [2022-03-15 17:04:19,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:19,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56716651] [2022-03-15 17:04:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:19,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:19,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56716651] [2022-03-15 17:04:19,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56716651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:19,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566226508] [2022-03-15 17:04:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:04:19,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:19,600 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 17:04:19,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:19,814 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 [2022-03-15 17:04:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:20,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:20,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:20,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566226508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:20,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:20,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:20,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389327970] [2022-03-15 17:04:20,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:20,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:20,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:20,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:20,743 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:22,715 INFO L93 Difference]: Finished difference Result 717 states and 1424 transitions. [2022-03-15 17:04:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:04:22,716 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:22,716 INFO L225 Difference]: With dead ends: 717 [2022-03-15 17:04:22,716 INFO L226 Difference]: Without dead ends: 702 [2022-03-15 17:04:22,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=497, Invalid=4615, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:04:22,717 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:22,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 366 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:04:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-15 17:04:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 407. [2022-03-15 17:04:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-03-15 17:04:22,722 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-03-15 17:04:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:22,722 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-03-15 17:04:22,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-03-15 17:04:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:22,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:22,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:22,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:22,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:22,924 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1750686265, now seen corresponding path program 108 times [2022-03-15 17:04:22,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:22,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320695258] [2022-03-15 17:04:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:23,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:23,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320695258] [2022-03-15 17:04:23,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320695258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:23,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661707158] [2022-03-15 17:04:23,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:04:23,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:23,235 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:23,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 17:04:23,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:04:23,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:23,442 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 [2022-03-15 17:04:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:23,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:24,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:24,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:24,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661707158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:24,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:24,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:04:24,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147948508] [2022-03-15 17:04:24,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:24,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:04:24,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:04:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:04:24,202 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:25,864 INFO L93 Difference]: Finished difference Result 851 states and 1681 transitions. [2022-03-15 17:04:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:04:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:25,865 INFO L225 Difference]: With dead ends: 851 [2022-03-15 17:04:25,865 INFO L226 Difference]: Without dead ends: 806 [2022-03-15 17:04:25,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:04:25,866 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:25,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 469 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:04:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-15 17:04:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 399. [2022-03-15 17:04:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2022-03-15 17:04:25,872 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2022-03-15 17:04:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:25,872 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2022-03-15 17:04:25,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2022-03-15 17:04:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:25,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:25,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:25,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:26,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:26,074 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash 197606663, now seen corresponding path program 109 times [2022-03-15 17:04:26,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:26,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569010447] [2022-03-15 17:04:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:26,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:26,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569010447] [2022-03-15 17:04:26,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569010447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:26,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554210612] [2022-03-15 17:04:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:26,380 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:26,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 17:04:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:26,605 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 [2022-03-15 17:04:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:26,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:27,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:27,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:27,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554210612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:27,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:27,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:27,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560363618] [2022-03-15 17:04:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:27,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:27,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:27,425 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:29,136 INFO L93 Difference]: Finished difference Result 834 states and 1650 transitions. [2022-03-15 17:04:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:04:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:29,137 INFO L225 Difference]: With dead ends: 834 [2022-03-15 17:04:29,137 INFO L226 Difference]: Without dead ends: 801 [2022-03-15 17:04:29,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=444, Invalid=4248, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:04:29,138 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:29,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 506 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:04:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-03-15 17:04:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 397. [2022-03-15 17:04:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2022-03-15 17:04:29,143 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2022-03-15 17:04:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2022-03-15 17:04:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2022-03-15 17:04:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:29,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:29,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:29,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 17:04:29,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:29,345 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2141902077, now seen corresponding path program 110 times [2022-03-15 17:04:29,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:29,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845418108] [2022-03-15 17:04:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:29,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:29,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845418108] [2022-03-15 17:04:29,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845418108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:29,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781000321] [2022-03-15 17:04:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:04:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:29,676 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:29,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 17:04:29,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:29,908 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 15 treesize of output 7 [2022-03-15 17:04:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:30,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:30,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:30,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:30,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781000321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:30,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:30,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:04:30,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543679073] [2022-03-15 17:04:30,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:30,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:04:30,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:04:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:04:30,812 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:32,516 INFO L93 Difference]: Finished difference Result 835 states and 1651 transitions. [2022-03-15 17:04:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:04:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:32,517 INFO L225 Difference]: With dead ends: 835 [2022-03-15 17:04:32,517 INFO L226 Difference]: Without dead ends: 799 [2022-03-15 17:04:32,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=469, Invalid=4787, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:04:32,518 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:32,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 463 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:04:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-15 17:04:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 394. [2022-03-15 17:04:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2022-03-15 17:04:32,523 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2022-03-15 17:04:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:32,523 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2022-03-15 17:04:32,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2022-03-15 17:04:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:32,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:32,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:32,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 17:04:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 17:04:32,724 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1485056713, now seen corresponding path program 111 times [2022-03-15 17:04:32,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:32,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702768468] [2022-03-15 17:04:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:33,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:33,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702768468] [2022-03-15 17:04:33,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702768468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:33,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840455736] [2022-03-15 17:04:33,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:04:33,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:33,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:33,040 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:33,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 17:04:33,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:04:33,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:33,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:33,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 17:04:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:33,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:33,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:33,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:34,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840455736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:34,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:34,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:34,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203732983] [2022-03-15 17:04:34,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:34,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:34,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:34,092 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:35,668 INFO L93 Difference]: Finished difference Result 839 states and 1642 transitions. [2022-03-15 17:04:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:04:35,669 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:35,670 INFO L225 Difference]: With dead ends: 839 [2022-03-15 17:04:35,670 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 17:04:35,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:04:35,670 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:35,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 500 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:04:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 17:04:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 423. [2022-03-15 17:04:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2022-03-15 17:04:35,676 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2022-03-15 17:04:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:35,676 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2022-03-15 17:04:35,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2022-03-15 17:04:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:35,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:35,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:35,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 17:04:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 17:04:35,877 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash -602990989, now seen corresponding path program 112 times [2022-03-15 17:04:35,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:35,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18588447] [2022-03-15 17:04:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:35,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:36,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:36,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18588447] [2022-03-15 17:04:36,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18588447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:36,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919754109] [2022-03-15 17:04:36,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:04:36,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:36,200 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:36,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 17:04:36,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:04:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:36,447 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 [2022-03-15 17:04:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:36,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:37,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:37,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:37,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919754109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:37,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:37,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:37,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208267094] [2022-03-15 17:04:37,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:37,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:37,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:37,267 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:39,227 INFO L93 Difference]: Finished difference Result 697 states and 1374 transitions. [2022-03-15 17:04:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:04:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:39,228 INFO L225 Difference]: With dead ends: 697 [2022-03-15 17:04:39,228 INFO L226 Difference]: Without dead ends: 682 [2022-03-15 17:04:39,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=4398, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 17:04:39,229 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:39,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 542 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-15 17:04:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 419. [2022-03-15 17:04:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2022-03-15 17:04:39,234 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2022-03-15 17:04:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:39,234 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2022-03-15 17:04:39,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2022-03-15 17:04:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:39,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:39,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:39,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:39,435 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 865675729, now seen corresponding path program 113 times [2022-03-15 17:04:39,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:39,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654079217] [2022-03-15 17:04:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:39,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654079217] [2022-03-15 17:04:39,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654079217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:39,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345027391] [2022-03-15 17:04:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:04:39,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:39,764 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:39,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 17:04:39,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:04:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:39,999 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 [2022-03-15 17:04:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:40,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:40,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:40,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:40,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345027391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:40,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:40,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:04:40,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647454152] [2022-03-15 17:04:40,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:40,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:04:40,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:04:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:04:40,836 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:42,267 INFO L93 Difference]: Finished difference Result 862 states and 1690 transitions. [2022-03-15 17:04:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:04:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:42,268 INFO L225 Difference]: With dead ends: 862 [2022-03-15 17:04:42,268 INFO L226 Difference]: Without dead ends: 817 [2022-03-15 17:04:42,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=3539, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:04:42,269 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:42,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 531 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1888 Invalid, 0 Unknown, 157 Unchecked, 0.7s Time] [2022-03-15 17:04:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-03-15 17:04:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 406. [2022-03-15 17:04:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-03-15 17:04:42,274 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-03-15 17:04:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:42,274 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-03-15 17:04:42,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-03-15 17:04:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:42,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:42,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:42,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 17:04:42,475 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1480998639, now seen corresponding path program 114 times [2022-03-15 17:04:42,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:42,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105608702] [2022-03-15 17:04:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:42,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:42,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105608702] [2022-03-15 17:04:42,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105608702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:42,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338501181] [2022-03-15 17:04:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:04:42,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:42,787 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:42,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 17:04:42,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:04:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:43,039 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 15 treesize of output 7 [2022-03-15 17:04:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:43,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:43,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:43,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:43,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338501181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:43,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:43,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:04:43,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644754883] [2022-03-15 17:04:43,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:43,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:04:43,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:04:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:04:43,849 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:45,492 INFO L93 Difference]: Finished difference Result 866 states and 1694 transitions. [2022-03-15 17:04:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:04:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:45,494 INFO L225 Difference]: With dead ends: 866 [2022-03-15 17:04:45,494 INFO L226 Difference]: Without dead ends: 833 [2022-03-15 17:04:45,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=4032, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:04:45,494 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 151 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:45,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 631 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-15 17:04:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 403. [2022-03-15 17:04:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-03-15 17:04:45,502 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-03-15 17:04:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-03-15 17:04:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-03-15 17:04:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:45,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:45,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:45,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 17:04:45,727 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash 474459917, now seen corresponding path program 115 times [2022-03-15 17:04:45,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:45,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409605776] [2022-03-15 17:04:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:45,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:46,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:46,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409605776] [2022-03-15 17:04:46,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409605776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:46,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343427305] [2022-03-15 17:04:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:46,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:46,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:46,051 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:46,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 17:04:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:46,302 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 [2022-03-15 17:04:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:46,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:47,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:47,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:47,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343427305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:47,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:47,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:04:47,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641030538] [2022-03-15 17:04:47,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:04:47,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:04:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:04:47,216 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:48,838 INFO L93 Difference]: Finished difference Result 888 states and 1730 transitions. [2022-03-15 17:04:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:04:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:48,840 INFO L225 Difference]: With dead ends: 888 [2022-03-15 17:04:48,840 INFO L226 Difference]: Without dead ends: 870 [2022-03-15 17:04:48,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=401, Invalid=4429, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 17:04:48,840 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 153 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:48,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 647 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2143 Invalid, 0 Unknown, 274 Unchecked, 0.8s Time] [2022-03-15 17:04:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-03-15 17:04:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 435. [2022-03-15 17:04:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.9907834101382489) internal successors, (864), 434 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 864 transitions. [2022-03-15 17:04:48,847 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 864 transitions. Word has length 30 [2022-03-15 17:04:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:48,847 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 864 transitions. [2022-03-15 17:04:48,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 864 transitions. [2022-03-15 17:04:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:48,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:48,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:48,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 17:04:49,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-15 17:04:49,051 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1951485783, now seen corresponding path program 116 times [2022-03-15 17:04:49,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:49,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360212006] [2022-03-15 17:04:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:49,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:49,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360212006] [2022-03-15 17:04:49,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360212006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:49,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130698723] [2022-03-15 17:04:49,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:04:49,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:49,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:49,383 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:49,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 17:04:49,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:49,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:49,644 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 15 treesize of output 7 [2022-03-15 17:04:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:49,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:50,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:50,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:50,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130698723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:50,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:50,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:04:50,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864976892] [2022-03-15 17:04:50,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:50,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:04:50,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:04:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:04:50,532 INFO L87 Difference]: Start difference. First operand 435 states and 864 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:52,330 INFO L93 Difference]: Finished difference Result 867 states and 1692 transitions. [2022-03-15 17:04:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 17:04:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:52,331 INFO L225 Difference]: With dead ends: 867 [2022-03-15 17:04:52,331 INFO L226 Difference]: Without dead ends: 844 [2022-03-15 17:04:52,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=428, Invalid=4828, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:04:52,332 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:52,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 655 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2229 Invalid, 0 Unknown, 126 Unchecked, 0.8s Time] [2022-03-15 17:04:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-03-15 17:04:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 400. [2022-03-15 17:04:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-03-15 17:04:52,337 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-03-15 17:04:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:52,338 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-03-15 17:04:52,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-03-15 17:04:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:52,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:52,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:52,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 17:04:52,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-15 17:04:52,540 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash -8943343, now seen corresponding path program 117 times [2022-03-15 17:04:52,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:52,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624137465] [2022-03-15 17:04:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:52,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:52,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624137465] [2022-03-15 17:04:52,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624137465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:52,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299826322] [2022-03-15 17:04:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:04:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:52,877 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:52,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 17:04:52,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:04:52,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:53,174 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 [2022-03-15 17:04:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:53,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:54,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:54,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-15 17:04:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:54,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299826322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:54,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:54,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 17:04:54,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61232333] [2022-03-15 17:04:54,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:54,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 17:04:54,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 17:04:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 17:04:54,170 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:55,978 INFO L93 Difference]: Finished difference Result 854 states and 1668 transitions. [2022-03-15 17:04:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:04:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:55,979 INFO L225 Difference]: With dead ends: 854 [2022-03-15 17:04:55,979 INFO L226 Difference]: Without dead ends: 847 [2022-03-15 17:04:55,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=440, Invalid=5110, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 17:04:55,980 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 181 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:55,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 738 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-03-15 17:04:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 388. [2022-03-15 17:04:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-03-15 17:04:55,985 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-03-15 17:04:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:55,985 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-03-15 17:04:55,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-03-15 17:04:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:55,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:55,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:56,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:56,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:56,187 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 962091669, now seen corresponding path program 118 times [2022-03-15 17:04:56,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:56,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033409404] [2022-03-15 17:04:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:56,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:56,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033409404] [2022-03-15 17:04:56,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033409404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:56,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583036063] [2022-03-15 17:04:56,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:04:56,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:56,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:56,478 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 17:04:56,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:04:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:04:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:56,578 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 15 treesize of output 7 [2022-03-15 17:04:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:57,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:04:57,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:04:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:57,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583036063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:57,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:57,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:04:57,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378805170] [2022-03-15 17:04:57,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:04:57,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:04:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:04:57,385 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:04:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:58,759 INFO L93 Difference]: Finished difference Result 794 states and 1567 transitions. [2022-03-15 17:04:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:04:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:58,761 INFO L225 Difference]: With dead ends: 794 [2022-03-15 17:04:58,761 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 17:04:58,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3128, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:04:58,761 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:58,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 374 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:04:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 17:04:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 415. [2022-03-15 17:04:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2022-03-15 17:04:58,766 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2022-03-15 17:04:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:58,767 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2022-03-15 17:04:58,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:04:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2022-03-15 17:04:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:58,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:58,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:58,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-15 17:04:58,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:58,968 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1844157393, now seen corresponding path program 119 times [2022-03-15 17:04:58,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:58,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129142999] [2022-03-15 17:04:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:59,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:59,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129142999] [2022-03-15 17:04:59,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129142999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:59,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242496790] [2022-03-15 17:04:59,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:04:59,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:59,265 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:59,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 17:04:59,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:04:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:04:59,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:59,361 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 [2022-03-15 17:04:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:59,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:00,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:00,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:00,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242496790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:00,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:00,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:05:00,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123915812] [2022-03-15 17:05:00,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:00,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:05:00,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:05:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:05:00,197 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:05:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:01,608 INFO L93 Difference]: Finished difference Result 679 states and 1351 transitions. [2022-03-15 17:05:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:05:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:01,609 INFO L225 Difference]: With dead ends: 679 [2022-03-15 17:05:01,609 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 17:05:01,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 17:05:01,609 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:01,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 366 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:05:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 17:05:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 413. [2022-03-15 17:05:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2022-03-15 17:05:01,614 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2022-03-15 17:05:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:01,614 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2022-03-15 17:05:01,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:05:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2022-03-15 17:05:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:01,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:01,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:01,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:01,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-03-15 17:05:01,815 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash -982143185, now seen corresponding path program 120 times [2022-03-15 17:05:01,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:01,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090732726] [2022-03-15 17:05:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:02,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:02,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090732726] [2022-03-15 17:05:02,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090732726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:02,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041183659] [2022-03-15 17:05:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:05:02,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:02,108 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:02,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 17:05:02,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:05:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:05:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:02,203 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 [2022-03-15 17:05:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:02,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:02,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:02,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041183659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:02,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:02,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-03-15 17:05:02,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442281553] [2022-03-15 17:05:02,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:02,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:05:02,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:05:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:05:02,987 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:04,317 INFO L93 Difference]: Finished difference Result 799 states and 1570 transitions. [2022-03-15 17:05:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:05:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:04,318 INFO L225 Difference]: With dead ends: 799 [2022-03-15 17:05:04,318 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 17:05:04,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=405, Invalid=2901, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 17:05:04,318 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:04,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 348 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:05:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 17:05:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 411. [2022-03-15 17:05:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.002439024390244) internal successors, (821), 410 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 821 transitions. [2022-03-15 17:05:04,323 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 821 transitions. Word has length 30 [2022-03-15 17:05:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:04,324 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 821 transitions. [2022-03-15 17:05:04,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 821 transitions. [2022-03-15 17:05:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:04,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:04,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:04,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-15 17:05:04,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:04,525 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:04,525 INFO L85 PathProgramCache]: Analyzing trace with hash -60441045, now seen corresponding path program 121 times [2022-03-15 17:05:04,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:04,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026209639] [2022-03-15 17:05:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:04,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:04,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026209639] [2022-03-15 17:05:04,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026209639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:04,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428880136] [2022-03-15 17:05:04,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:05:04,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:04,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:04,814 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:04,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 17:05:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:04,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:04,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:04,910 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 15 treesize of output 7 [2022-03-15 17:05:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:05,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:05,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:05,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:05,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428880136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:05,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:05,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:05:05,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174570555] [2022-03-15 17:05:05,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:05,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:05:05,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:05:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:05:05,710 INFO L87 Difference]: Start difference. First operand 411 states and 821 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:05:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:07,056 INFO L93 Difference]: Finished difference Result 784 states and 1548 transitions. [2022-03-15 17:05:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:05:07,056 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:07,057 INFO L225 Difference]: With dead ends: 784 [2022-03-15 17:05:07,057 INFO L226 Difference]: Without dead ends: 741 [2022-03-15 17:05:07,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=3027, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 17:05:07,057 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:07,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 390 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:05:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-15 17:05:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 396. [2022-03-15 17:05:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-03-15 17:05:07,062 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-03-15 17:05:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:07,062 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-03-15 17:05:07,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 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) [2022-03-15 17:05:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-03-15 17:05:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:07,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:07,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:07,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 17:05:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:07,265 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -874861461, now seen corresponding path program 122 times [2022-03-15 17:05:07,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:07,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874839899] [2022-03-15 17:05:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:07,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:07,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874839899] [2022-03-15 17:05:07,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874839899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:07,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833163907] [2022-03-15 17:05:07,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:05:07,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:07,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:07,548 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:07,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 17:05:07,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:07,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:07,646 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 [2022-03-15 17:05:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:07,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:08,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:08,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:05:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:08,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833163907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:08,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:08,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-03-15 17:05:08,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221846086] [2022-03-15 17:05:08,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:08,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:05:08,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:05:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:05:08,546 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:05:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:10,196 INFO L93 Difference]: Finished difference Result 833 states and 1627 transitions. [2022-03-15 17:05:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:05:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:10,197 INFO L225 Difference]: With dead ends: 833 [2022-03-15 17:05:10,197 INFO L226 Difference]: Without dead ends: 824 [2022-03-15 17:05:10,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=3556, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:05:10,198 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:10,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 426 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-15 17:05:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 413. [2022-03-15 17:05:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-03-15 17:05:10,203 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-03-15 17:05:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:10,204 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-03-15 17:05:10,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:05:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-03-15 17:05:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:10,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:10,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:10,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 17:05:10,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 17:05:10,405 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash 7204263, now seen corresponding path program 123 times [2022-03-15 17:05:10,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:10,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732101285] [2022-03-15 17:05:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:10,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:10,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732101285] [2022-03-15 17:05:10,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732101285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:10,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241316990] [2022-03-15 17:05:10,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:05:10,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:10,687 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:10,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 17:05:10,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:05:10,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:10,781 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 [2022-03-15 17:05:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:11,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:11,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:11,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:05:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:11,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241316990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:11,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:11,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-03-15 17:05:11,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398198151] [2022-03-15 17:05:11,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:11,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:05:11,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:05:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:05:11,689 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:05:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:13,449 INFO L93 Difference]: Finished difference Result 717 states and 1409 transitions. [2022-03-15 17:05:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:05:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:13,451 INFO L225 Difference]: With dead ends: 717 [2022-03-15 17:05:13,451 INFO L226 Difference]: Without dead ends: 702 [2022-03-15 17:05:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=3413, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:05:13,451 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:13,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 417 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-15 17:05:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 411. [2022-03-15 17:05:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-03-15 17:05:13,458 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-03-15 17:05:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:13,458 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-03-15 17:05:13,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 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) [2022-03-15 17:05:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-03-15 17:05:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:13,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:13,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:13,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 17:05:13,675 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1475870981, now seen corresponding path program 124 times [2022-03-15 17:05:13,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:13,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080825465] [2022-03-15 17:05:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:13,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:13,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:13,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080825465] [2022-03-15 17:05:13,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080825465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:13,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013205008] [2022-03-15 17:05:13,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:05:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:13,962 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:13,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 17:05:13,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:05:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:14,061 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 15 treesize of output 7 [2022-03-15 17:05:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:14,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:14,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:14,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:14,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013205008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:14,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:14,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-03-15 17:05:14,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105458951] [2022-03-15 17:05:14,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:14,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:05:14,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:05:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:05:14,844 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:16,290 INFO L93 Difference]: Finished difference Result 819 states and 1603 transitions. [2022-03-15 17:05:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:05:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:16,291 INFO L225 Difference]: With dead ends: 819 [2022-03-15 17:05:16,291 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 17:05:16,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 17:05:16,291 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 166 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:16,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 387 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:05:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 17:05:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 409. [2022-03-15 17:05:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-03-15 17:05:16,297 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-03-15 17:05:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:16,297 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-03-15 17:05:16,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-03-15 17:05:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:16,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:16,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:16,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 17:05:16,498 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1897394175, now seen corresponding path program 125 times [2022-03-15 17:05:16,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:16,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226630186] [2022-03-15 17:05:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:16,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:16,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226630186] [2022-03-15 17:05:16,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226630186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:16,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717900536] [2022-03-15 17:05:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:05:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:16,783 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 17:05:16,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:05:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:05:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:16,879 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 [2022-03-15 17:05:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:17,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:17,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:17,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:17,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717900536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:17,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:17,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-03-15 17:05:17,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779251163] [2022-03-15 17:05:17,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:17,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 17:05:17,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 17:05:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 17:05:17,675 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:05:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:19,021 INFO L93 Difference]: Finished difference Result 798 states and 1571 transitions. [2022-03-15 17:05:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:05:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) Word has length 30 [2022-03-15 17:05:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:19,022 INFO L225 Difference]: With dead ends: 798 [2022-03-15 17:05:19,022 INFO L226 Difference]: Without dead ends: 755 [2022-03-15 17:05:19,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 17:05:19,023 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:19,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 418 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:05:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-15 17:05:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-03-15 17:05:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-03-15 17:05:19,028 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-03-15 17:05:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:19,028 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-03-15 17:05:19,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) 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) [2022-03-15 17:05:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-03-15 17:05:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:19,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:19,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:19,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:19,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:19,229 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1122547601, now seen corresponding path program 126 times [2022-03-15 17:05:19,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:19,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110380885] [2022-03-15 17:05:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:19,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:19,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110380885] [2022-03-15 17:05:19,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110380885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:19,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247057951] [2022-03-15 17:05:19,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:05:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:19,525 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:19,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 17:05:19,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:05:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:05:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:19,627 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 [2022-03-15 17:05:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:20,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:20,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:20,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247057951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:20,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:20,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:05:20,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326132263] [2022-03-15 17:05:20,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:20,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:20,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:20,495 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:05:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:22,489 INFO L93 Difference]: Finished difference Result 873 states and 1718 transitions. [2022-03-15 17:05:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:05:22,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:22,490 INFO L225 Difference]: With dead ends: 873 [2022-03-15 17:05:22,490 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 17:05:22,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=518, Invalid=4038, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:05:22,491 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:22,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 426 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 17:05:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 411. [2022-03-15 17:05:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-03-15 17:05:22,496 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-03-15 17:05:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:22,496 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-03-15 17:05:22,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:05:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-03-15 17:05:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:22,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:22,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:22,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:22,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 17:05:22,697 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2004613325, now seen corresponding path program 127 times [2022-03-15 17:05:22,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:22,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006669385] [2022-03-15 17:05:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:23,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:23,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006669385] [2022-03-15 17:05:23,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006669385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:23,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129356078] [2022-03-15 17:05:23,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:05:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:23,028 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:23,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 17:05:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:23,126 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 15 treesize of output 7 [2022-03-15 17:05:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:23,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:23,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:24,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129356078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:24,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:24,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:05:24,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126323934] [2022-03-15 17:05:24,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:24,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:24,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:24,007 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:05:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:26,234 INFO L93 Difference]: Finished difference Result 730 states and 1445 transitions. [2022-03-15 17:05:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:05:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:26,236 INFO L225 Difference]: With dead ends: 730 [2022-03-15 17:05:26,236 INFO L226 Difference]: Without dead ends: 715 [2022-03-15 17:05:26,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:05:26,236 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:26,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 411 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-15 17:05:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 409. [2022-03-15 17:05:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-03-15 17:05:26,241 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-03-15 17:05:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:26,241 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-03-15 17:05:26,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2022-03-15 17:05:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-03-15 17:05:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:26,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:26,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:26,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:26,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 17:05:26,442 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash -821687253, now seen corresponding path program 128 times [2022-03-15 17:05:26,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:26,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078869650] [2022-03-15 17:05:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:26,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:26,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078869650] [2022-03-15 17:05:26,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078869650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:26,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484502248] [2022-03-15 17:05:26,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:05:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:26,776 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:26,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 17:05:26,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:26,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:26,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:26,877 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 [2022-03-15 17:05:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:27,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:27,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:27,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:05:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:27,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484502248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:27,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:27,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-03-15 17:05:27,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681932710] [2022-03-15 17:05:27,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:27,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 17:05:27,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 17:05:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 17:05:27,801 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:30,062 INFO L93 Difference]: Finished difference Result 956 states and 1875 transitions. [2022-03-15 17:05:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 17:05:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:30,064 INFO L225 Difference]: With dead ends: 956 [2022-03-15 17:05:30,064 INFO L226 Difference]: Without dead ends: 904 [2022-03-15 17:05:30,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 17:05:30,064 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 253 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:30,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 459 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:05:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-03-15 17:05:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-03-15 17:05:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-03-15 17:05:30,070 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-03-15 17:05:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:30,070 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-03-15 17:05:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-03-15 17:05:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:30,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:30,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:30,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:30,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:30,271 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash 66931137, now seen corresponding path program 129 times [2022-03-15 17:05:30,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:30,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666599279] [2022-03-15 17:05:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:30,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:30,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666599279] [2022-03-15 17:05:30,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666599279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:30,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420684643] [2022-03-15 17:05:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:05:30,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:30,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:30,574 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:30,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 17:05:30,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:05:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:30,674 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 [2022-03-15 17:05:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:30,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:31,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:31,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:31,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420684643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:31,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:31,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:05:31,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069036055] [2022-03-15 17:05:31,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:31,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:31,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:31,537 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:05:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:32,824 INFO L93 Difference]: Finished difference Result 798 states and 1566 transitions. [2022-03-15 17:05:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:05:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:32,825 INFO L225 Difference]: With dead ends: 798 [2022-03-15 17:05:32,825 INFO L226 Difference]: Without dead ends: 789 [2022-03-15 17:05:32,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 17:05:32,825 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:32,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 317 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:05:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-15 17:05:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 410. [2022-03-15 17:05:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-03-15 17:05:32,830 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-03-15 17:05:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:32,830 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-03-15 17:05:32,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:05:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-03-15 17:05:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:32,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:32,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:32,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:33,032 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 948996861, now seen corresponding path program 130 times [2022-03-15 17:05:33,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:33,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006859813] [2022-03-15 17:05:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:33,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:33,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006859813] [2022-03-15 17:05:33,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006859813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:33,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131485165] [2022-03-15 17:05:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:05:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:33,343 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:33,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 17:05:33,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:05:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:33,441 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 15 treesize of output 7 [2022-03-15 17:05:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:34,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:34,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:34,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131485165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:34,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:34,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:05:34,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337984807] [2022-03-15 17:05:34,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:34,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:34,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:34,362 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:05:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:35,964 INFO L93 Difference]: Finished difference Result 681 states and 1339 transitions. [2022-03-15 17:05:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:05:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:35,965 INFO L225 Difference]: With dead ends: 681 [2022-03-15 17:05:35,965 INFO L226 Difference]: Without dead ends: 648 [2022-03-15 17:05:35,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:05:35,965 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:35,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 376 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1583 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-03-15 17:05:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-15 17:05:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-03-15 17:05:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-03-15 17:05:35,969 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-03-15 17:05:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:35,970 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-03-15 17:05:35,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 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) [2022-03-15 17:05:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-03-15 17:05:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:35,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:35,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:35,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 17:05:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:36,171 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash 70989211, now seen corresponding path program 131 times [2022-03-15 17:05:36,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:36,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452935663] [2022-03-15 17:05:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:36,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:36,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:36,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452935663] [2022-03-15 17:05:36,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452935663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:36,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506330934] [2022-03-15 17:05:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:05:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:36,468 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:36,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 17:05:36,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:36,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:36,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:36,566 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 15 treesize of output 7 [2022-03-15 17:05:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:36,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:37,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:37,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:37,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506330934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:37,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:37,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-03-15 17:05:37,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616156650] [2022-03-15 17:05:37,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:37,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:37,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:37,463 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:38,769 INFO L93 Difference]: Finished difference Result 781 states and 1539 transitions. [2022-03-15 17:05:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:05:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:38,770 INFO L225 Difference]: With dead ends: 781 [2022-03-15 17:05:38,770 INFO L226 Difference]: Without dead ends: 748 [2022-03-15 17:05:38,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:05:38,771 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 153 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:38,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 366 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:05:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-15 17:05:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 395. [2022-03-15 17:05:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-03-15 17:05:38,776 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-03-15 17:05:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:38,776 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-03-15 17:05:38,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-03-15 17:05:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:38,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:38,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:38,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:38,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:38,977 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash -936370625, now seen corresponding path program 132 times [2022-03-15 17:05:38,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:38,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393103037] [2022-03-15 17:05:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:39,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:39,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393103037] [2022-03-15 17:05:39,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393103037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:39,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935785008] [2022-03-15 17:05:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:05:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:39,289 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 17:05:39,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:05:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:05:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:39,450 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 [2022-03-15 17:05:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:39,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:40,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:40,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:40,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935785008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:40,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:40,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:05:40,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894117649] [2022-03-15 17:05:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:40,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:05:40,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:40,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:05:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:05:40,329 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:41,849 INFO L93 Difference]: Finished difference Result 816 states and 1604 transitions. [2022-03-15 17:05:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:05:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:41,851 INFO L225 Difference]: With dead ends: 816 [2022-03-15 17:05:41,851 INFO L226 Difference]: Without dead ends: 807 [2022-03-15 17:05:41,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=3969, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:05:41,851 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 416 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:05:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-15 17:05:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 413. [2022-03-15 17:05:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-03-15 17:05:41,856 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-03-15 17:05:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-03-15 17:05:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-03-15 17:05:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:41,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:41,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:41,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:42,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 17:05:42,057 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -54304901, now seen corresponding path program 133 times [2022-03-15 17:05:42,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:42,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106355425] [2022-03-15 17:05:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:42,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:42,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106355425] [2022-03-15 17:05:42,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106355425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:42,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100931185] [2022-03-15 17:05:42,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:05:42,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:42,375 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 17:05:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:42,545 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 15 treesize of output 7 [2022-03-15 17:05:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:42,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:43,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:43,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:43,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100931185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:43,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:43,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:05:43,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932003815] [2022-03-15 17:05:43,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:43,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:05:43,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:05:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:05:43,526 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:45,248 INFO L93 Difference]: Finished difference Result 700 states and 1386 transitions. [2022-03-15 17:05:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:05:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:45,249 INFO L225 Difference]: With dead ends: 700 [2022-03-15 17:05:45,249 INFO L226 Difference]: Without dead ends: 685 [2022-03-15 17:05:45,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:05:45,249 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 395 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:05:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-15 17:05:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 411. [2022-03-15 17:05:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-03-15 17:05:45,254 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-03-15 17:05:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:45,254 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-03-15 17:05:45,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-03-15 17:05:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:45,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:45,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:45,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:45,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 17:05:45,455 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1414361817, now seen corresponding path program 134 times [2022-03-15 17:05:45,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:45,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367938989] [2022-03-15 17:05:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:45,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:45,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367938989] [2022-03-15 17:05:45,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367938989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:45,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426357214] [2022-03-15 17:05:45,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:05:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:45,766 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:45,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 17:05:45,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:45,926 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 [2022-03-15 17:05:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:46,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:46,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:46,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:05:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:46,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426357214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:46,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:46,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:05:46,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633990455] [2022-03-15 17:05:46,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:46,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:05:46,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:05:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:05:46,891 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:48,622 INFO L93 Difference]: Finished difference Result 849 states and 1651 transitions. [2022-03-15 17:05:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 17:05:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:48,623 INFO L225 Difference]: With dead ends: 849 [2022-03-15 17:05:48,623 INFO L226 Difference]: Without dead ends: 812 [2022-03-15 17:05:48,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=569, Invalid=4543, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:05:48,623 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 183 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:48,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 470 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-15 17:05:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 409. [2022-03-15 17:05:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-03-15 17:05:48,629 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-03-15 17:05:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-03-15 17:05:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-03-15 17:05:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:48,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:48,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:48,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-15 17:05:48,830 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1958903339, now seen corresponding path program 135 times [2022-03-15 17:05:48,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:48,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191050836] [2022-03-15 17:05:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:49,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:49,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191050836] [2022-03-15 17:05:49,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191050836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:49,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649144533] [2022-03-15 17:05:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:05:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:49,146 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:49,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 17:05:49,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:05:49,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:49,307 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 [2022-03-15 17:05:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:49,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:50,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:50,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:05:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:50,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649144533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:50,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:50,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:05:50,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584048532] [2022-03-15 17:05:50,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:50,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:05:50,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:05:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:05:50,300 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:51,900 INFO L93 Difference]: Finished difference Result 828 states and 1619 transitions. [2022-03-15 17:05:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:05:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:51,902 INFO L225 Difference]: With dead ends: 828 [2022-03-15 17:05:51,902 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 17:05:51,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=543, Invalid=4427, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:05:51,902 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:51,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 507 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:05:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 17:05:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 397. [2022-03-15 17:05:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-03-15 17:05:51,908 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-03-15 17:05:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:51,909 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-03-15 17:05:51,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-03-15 17:05:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:51,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:51,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:51,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:52,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:52,112 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1061038437, now seen corresponding path program 136 times [2022-03-15 17:05:52,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:52,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147510051] [2022-03-15 17:05:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:52,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:52,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147510051] [2022-03-15 17:05:52,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147510051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:52,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309493986] [2022-03-15 17:05:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:05:52,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:52,421 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:52,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 17:05:52,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:05:52,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:52,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:52,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:52,579 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 15 treesize of output 7 [2022-03-15 17:05:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:52,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:53,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:53,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:53,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309493986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:53,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:53,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:05:53,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142656303] [2022-03-15 17:05:53,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:53,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:05:53,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:05:53,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:05:53,452 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:55,356 INFO L93 Difference]: Finished difference Result 885 states and 1740 transitions. [2022-03-15 17:05:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:05:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:55,357 INFO L225 Difference]: With dead ends: 885 [2022-03-15 17:05:55,357 INFO L226 Difference]: Without dead ends: 876 [2022-03-15 17:05:55,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=557, Invalid=4699, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:05:55,358 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 209 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:55,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 382 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:05:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-03-15 17:05:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 411. [2022-03-15 17:05:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-03-15 17:05:55,363 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-03-15 17:05:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-03-15 17:05:55,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-03-15 17:05:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:55,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:55,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:55,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:55,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:55,565 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1943104161, now seen corresponding path program 137 times [2022-03-15 17:05:55,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:55,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227261502] [2022-03-15 17:05:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:55,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:55,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:55,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227261502] [2022-03-15 17:05:55,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227261502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:55,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983016989] [2022-03-15 17:05:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:05:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:55,896 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 17:05:55,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:05:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:05:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:56,064 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 [2022-03-15 17:05:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:56,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:56,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:05:56,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:05:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:57,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983016989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:57,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:57,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:05:57,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477486081] [2022-03-15 17:05:57,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:57,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:05:57,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:05:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:05:57,038 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:59,239 INFO L93 Difference]: Finished difference Result 739 states and 1461 transitions. [2022-03-15 17:05:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:05:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:05:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:59,241 INFO L225 Difference]: With dead ends: 739 [2022-03-15 17:05:59,241 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 17:05:59,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:05:59,241 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 190 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:59,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 432 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:05:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 17:05:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 409. [2022-03-15 17:05:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-03-15 17:05:59,246 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-03-15 17:05:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:59,246 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-03-15 17:05:59,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-03-15 17:05:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:05:59,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:59,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:59,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:59,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-15 17:05:59,447 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash -883196417, now seen corresponding path program 138 times [2022-03-15 17:05:59,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:59,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703469843] [2022-03-15 17:05:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:59,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:59,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703469843] [2022-03-15 17:05:59,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703469843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:59,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944654038] [2022-03-15 17:05:59,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:05:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:59,751 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:59,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 17:05:59,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:05:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:05:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:59,908 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 [2022-03-15 17:06:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:00,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:00,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:06:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:00,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944654038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:00,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:00,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:06:00,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025036258] [2022-03-15 17:06:00,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:00,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:06:00,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:06:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:06:00,847 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:03,143 INFO L93 Difference]: Finished difference Result 956 states and 1877 transitions. [2022-03-15 17:06:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 17:06:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:03,145 INFO L225 Difference]: With dead ends: 956 [2022-03-15 17:06:03,145 INFO L226 Difference]: Without dead ends: 904 [2022-03-15 17:06:03,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=846, Invalid=5634, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 17:06:03,145 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 266 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:03,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 458 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:06:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-03-15 17:06:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-03-15 17:06:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-03-15 17:06:03,151 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-03-15 17:06:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:03,151 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-03-15 17:06:03,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-03-15 17:06:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:03,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:03,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:03,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:03,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:03,352 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 5421973, now seen corresponding path program 139 times [2022-03-15 17:06:03,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:03,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154350153] [2022-03-15 17:06:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:03,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:03,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154350153] [2022-03-15 17:06:03,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154350153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:03,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198286983] [2022-03-15 17:06:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:06:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:03,674 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:03,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 17:06:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:03,883 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 15 treesize of output 7 [2022-03-15 17:06:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:04,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:04,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:04,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:04,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198286983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:04,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:04,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:04,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358312471] [2022-03-15 17:06:04,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:04,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:04,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:04,823 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:06,246 INFO L93 Difference]: Finished difference Result 796 states and 1563 transitions. [2022-03-15 17:06:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:06:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:06,247 INFO L225 Difference]: With dead ends: 796 [2022-03-15 17:06:06,247 INFO L226 Difference]: Without dead ends: 787 [2022-03-15 17:06:06,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=3620, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:06:06,248 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:06,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 438 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-03-15 17:06:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 410. [2022-03-15 17:06:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-03-15 17:06:06,253 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-03-15 17:06:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:06,253 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-03-15 17:06:06,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-03-15 17:06:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:06,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:06,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:06,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:06,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:06,455 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 887487697, now seen corresponding path program 140 times [2022-03-15 17:06:06,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:06,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202472267] [2022-03-15 17:06:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:06,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:06,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202472267] [2022-03-15 17:06:06,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202472267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:06,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834598183] [2022-03-15 17:06:06,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:06:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:06,791 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:06,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 17:06:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:06:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:06,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:06,958 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 [2022-03-15 17:06:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:07,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:07,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:07,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:07,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834598183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:07,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:07,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:07,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135954484] [2022-03-15 17:06:07,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:07,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:07,916 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:09,362 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-03-15 17:06:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:06:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:09,363 INFO L225 Difference]: With dead ends: 671 [2022-03-15 17:06:09,363 INFO L226 Difference]: Without dead ends: 648 [2022-03-15 17:06:09,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=3596, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:06:09,363 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:09,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 303 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:06:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-15 17:06:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-03-15 17:06:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-03-15 17:06:09,368 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-03-15 17:06:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:09,368 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-03-15 17:06:09,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-03-15 17:06:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:09,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:09,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:09,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:09,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:09,569 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash 9480047, now seen corresponding path program 141 times [2022-03-15 17:06:09,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:09,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152424497] [2022-03-15 17:06:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:09,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:09,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152424497] [2022-03-15 17:06:09,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152424497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:09,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586453022] [2022-03-15 17:06:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:06:09,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:09,900 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:09,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 17:06:09,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:06:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:10,066 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 15 treesize of output 7 [2022-03-15 17:06:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:10,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:10,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:10,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:11,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586453022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:11,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:11,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:11,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849237721] [2022-03-15 17:06:11,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:11,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:11,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:11,003 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:12,440 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-03-15 17:06:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:06:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:12,441 INFO L225 Difference]: With dead ends: 790 [2022-03-15 17:06:12,441 INFO L226 Difference]: Without dead ends: 757 [2022-03-15 17:06:12,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=3487, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:06:12,442 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:12,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 489 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-15 17:06:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 396. [2022-03-15 17:06:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-03-15 17:06:12,447 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-03-15 17:06:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:12,447 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-03-15 17:06:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-03-15 17:06:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:12,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:12,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:12,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:12,649 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -159765419, now seen corresponding path program 142 times [2022-03-15 17:06:12,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:12,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285683304] [2022-03-15 17:06:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:12,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:12,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285683304] [2022-03-15 17:06:12,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285683304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:12,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605466395] [2022-03-15 17:06:12,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:06:12,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:12,963 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:12,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 17:06:12,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:06:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:12,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:13,122 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 15 treesize of output 7 [2022-03-15 17:06:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:13,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:13,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:13,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:14,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605466395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:14,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:14,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:14,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891654090] [2022-03-15 17:06:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:14,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:14,021 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:16,067 INFO L93 Difference]: Finished difference Result 841 states and 1655 transitions. [2022-03-15 17:06:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:06:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:16,068 INFO L225 Difference]: With dead ends: 841 [2022-03-15 17:06:16,068 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 17:06:16,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=623, Invalid=4927, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 17:06:16,068 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 204 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:16,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 396 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:06:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 17:06:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 411. [2022-03-15 17:06:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-03-15 17:06:16,074 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-03-15 17:06:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:16,074 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-03-15 17:06:16,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-03-15 17:06:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:16,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:16,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:16,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:16,275 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash 722300305, now seen corresponding path program 143 times [2022-03-15 17:06:16,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:16,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136476837] [2022-03-15 17:06:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:16,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:16,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136476837] [2022-03-15 17:06:16,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136476837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:16,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664026398] [2022-03-15 17:06:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:06:16,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:16,586 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 17:06:16,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:06:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:06:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:16,747 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 [2022-03-15 17:06:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:17,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:17,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:17,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:17,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664026398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:17,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:17,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:17,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393192657] [2022-03-15 17:06:17,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:17,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:17,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:17,737 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:19,996 INFO L93 Difference]: Finished difference Result 692 states and 1369 transitions. [2022-03-15 17:06:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:06:19,996 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:19,997 INFO L225 Difference]: With dead ends: 692 [2022-03-15 17:06:19,997 INFO L226 Difference]: Without dead ends: 677 [2022-03-15 17:06:19,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:06:19,998 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 185 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:19,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 413 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:06:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-15 17:06:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2022-03-15 17:06:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2022-03-15 17:06:20,002 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2022-03-15 17:06:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:20,002 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2022-03-15 17:06:20,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2022-03-15 17:06:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:20,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:20,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:20,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:20,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 17:06:20,204 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2104000273, now seen corresponding path program 144 times [2022-03-15 17:06:20,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:20,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684119273] [2022-03-15 17:06:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:20,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:20,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684119273] [2022-03-15 17:06:20,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684119273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:20,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166745746] [2022-03-15 17:06:20,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:06:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:20,511 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:20,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 17:06:20,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:06:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:20,664 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 [2022-03-15 17:06:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:21,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:21,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:06:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:21,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166745746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:21,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:21,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:06:21,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785689129] [2022-03-15 17:06:21,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:21,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:06:21,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:06:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:06:21,646 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:24,098 INFO L93 Difference]: Finished difference Result 934 states and 1827 transitions. [2022-03-15 17:06:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 17:06:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:24,099 INFO L225 Difference]: With dead ends: 934 [2022-03-15 17:06:24,099 INFO L226 Difference]: Without dead ends: 882 [2022-03-15 17:06:24,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=989, Invalid=6493, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 17:06:24,100 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 267 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:24,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 434 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:06:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-03-15 17:06:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 408. [2022-03-15 17:06:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2022-03-15 17:06:24,105 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2022-03-15 17:06:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:24,106 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2022-03-15 17:06:24,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2022-03-15 17:06:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:24,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:24,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:24,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 17:06:24,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:24,307 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1215381883, now seen corresponding path program 145 times [2022-03-15 17:06:24,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:24,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437140087] [2022-03-15 17:06:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:24,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:24,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437140087] [2022-03-15 17:06:24,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437140087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:24,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539870118] [2022-03-15 17:06:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:06:24,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:24,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:24,631 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:24,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 17:06:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:24,795 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 15 treesize of output 7 [2022-03-15 17:06:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:25,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:25,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:25,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:25,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539870118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:25,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:25,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:25,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352051589] [2022-03-15 17:06:25,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:25,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:25,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:25,786 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:27,503 INFO L93 Difference]: Finished difference Result 791 states and 1552 transitions. [2022-03-15 17:06:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:06:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:27,504 INFO L225 Difference]: With dead ends: 791 [2022-03-15 17:06:27,504 INFO L226 Difference]: Without dead ends: 782 [2022-03-15 17:06:27,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:06:27,504 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 450 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-15 17:06:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 410. [2022-03-15 17:06:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-03-15 17:06:27,510 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-03-15 17:06:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-03-15 17:06:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-03-15 17:06:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:27,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:27,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:27,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-15 17:06:27,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 17:06:27,711 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash -333316159, now seen corresponding path program 146 times [2022-03-15 17:06:27,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:27,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528682776] [2022-03-15 17:06:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:28,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:28,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528682776] [2022-03-15 17:06:28,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528682776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:28,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141921996] [2022-03-15 17:06:28,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:06:28,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:28,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:28,035 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:28,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 17:06:28,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:06:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:28,201 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 [2022-03-15 17:06:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:28,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:29,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:29,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:29,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141921996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:29,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:29,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:29,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437843110] [2022-03-15 17:06:29,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:29,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:29,227 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:31,037 INFO L93 Difference]: Finished difference Result 653 states and 1283 transitions. [2022-03-15 17:06:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:06:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:31,038 INFO L225 Difference]: With dead ends: 653 [2022-03-15 17:06:31,038 INFO L226 Difference]: Without dead ends: 620 [2022-03-15 17:06:31,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=550, Invalid=4420, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:06:31,039 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:31,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 356 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1474 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-03-15 17:06:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-03-15 17:06:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 400. [2022-03-15 17:06:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-03-15 17:06:31,043 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-03-15 17:06:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:31,043 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-03-15 17:06:31,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-03-15 17:06:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:31,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:31,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:31,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 17:06:31,244 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1211323809, now seen corresponding path program 147 times [2022-03-15 17:06:31,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:31,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750725186] [2022-03-15 17:06:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:31,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:31,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750725186] [2022-03-15 17:06:31,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750725186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:31,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816399305] [2022-03-15 17:06:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:06:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:31,559 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:31,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 17:06:31,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:06:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:31,725 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 15 treesize of output 7 [2022-03-15 17:06:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:32,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:32,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:32,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:32,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816399305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:32,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:32,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:32,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484880140] [2022-03-15 17:06:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:32,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:32,634 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:34,279 INFO L93 Difference]: Finished difference Result 788 states and 1553 transitions. [2022-03-15 17:06:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:06:34,279 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:34,280 INFO L225 Difference]: With dead ends: 788 [2022-03-15 17:06:34,280 INFO L226 Difference]: Without dead ends: 755 [2022-03-15 17:06:34,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=502, Invalid=4054, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:06:34,281 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:34,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 473 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-15 17:06:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-03-15 17:06:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2022-03-15 17:06:34,286 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2022-03-15 17:06:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:34,286 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2022-03-15 17:06:34,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:34,286 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2022-03-15 17:06:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:34,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:34,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:34,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:34,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-15 17:06:34,487 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -725186305, now seen corresponding path program 148 times [2022-03-15 17:06:34,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:34,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138020768] [2022-03-15 17:06:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:34,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:34,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138020768] [2022-03-15 17:06:34,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138020768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:34,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667273027] [2022-03-15 17:06:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:06:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:34,841 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:34,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 17:06:34,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:06:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:34,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:35,005 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 15 treesize of output 7 [2022-03-15 17:06:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:35,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:35,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:35,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:35,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667273027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:35,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:35,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:35,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562138978] [2022-03-15 17:06:35,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:35,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:35,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:35,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:35,923 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:37,360 INFO L93 Difference]: Finished difference Result 784 states and 1539 transitions. [2022-03-15 17:06:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:06:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:37,362 INFO L225 Difference]: With dead ends: 784 [2022-03-15 17:06:37,362 INFO L226 Difference]: Without dead ends: 775 [2022-03-15 17:06:37,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=3741, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:06:37,362 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:37,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 442 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-15 17:06:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 411. [2022-03-15 17:06:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-03-15 17:06:37,368 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-03-15 17:06:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:37,368 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-03-15 17:06:37,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-03-15 17:06:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:37,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:37,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:37,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:37,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:37,569 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 156879419, now seen corresponding path program 149 times [2022-03-15 17:06:37,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:37,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289474477] [2022-03-15 17:06:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:37,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:37,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289474477] [2022-03-15 17:06:37,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289474477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:37,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833689079] [2022-03-15 17:06:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:06:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:37,890 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:37,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 17:06:37,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:06:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:37,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:38,054 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 [2022-03-15 17:06:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:38,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:38,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:38,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:38,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833689079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:38,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:38,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:38,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356374064] [2022-03-15 17:06:38,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:38,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:38,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:38,993 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:40,564 INFO L93 Difference]: Finished difference Result 657 states and 1298 transitions. [2022-03-15 17:06:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:06:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:40,566 INFO L225 Difference]: With dead ends: 657 [2022-03-15 17:06:40,566 INFO L226 Difference]: Without dead ends: 642 [2022-03-15 17:06:40,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=3715, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:06:40,566 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:40,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 416 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-03-15 17:06:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 409. [2022-03-15 17:06:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-03-15 17:06:40,571 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-03-15 17:06:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:40,571 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-03-15 17:06:40,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-03-15 17:06:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:40,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:40,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:40,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:40,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:40,772 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1625546137, now seen corresponding path program 150 times [2022-03-15 17:06:40,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:40,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998924630] [2022-03-15 17:06:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:41,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:41,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998924630] [2022-03-15 17:06:41,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998924630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:41,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433485253] [2022-03-15 17:06:41,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:06:41,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:41,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:41,085 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:41,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 17:06:41,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:06:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:41,238 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 [2022-03-15 17:06:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:41,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:41,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:41,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:42,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433485253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:42,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:42,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:06:42,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493562781] [2022-03-15 17:06:42,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:06:42,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:06:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:06:42,153 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:43,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:43,101 INFO L93 Difference]: Finished difference Result 642 states and 1267 transitions. [2022-03-15 17:06:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 17:06:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:43,102 INFO L225 Difference]: With dead ends: 642 [2022-03-15 17:06:43,102 INFO L226 Difference]: Without dead ends: 603 [2022-03-15 17:06:43,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 17:06:43,103 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 107 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:43,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 594 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1521 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-03-15 17:06:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-15 17:06:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 401. [2022-03-15 17:06:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-03-15 17:06:43,107 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-03-15 17:06:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:43,107 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-03-15 17:06:43,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-03-15 17:06:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:43,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:43,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:43,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:43,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:43,308 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -721128231, now seen corresponding path program 151 times [2022-03-15 17:06:43,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:43,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668982076] [2022-03-15 17:06:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:43,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:43,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668982076] [2022-03-15 17:06:43,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668982076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:43,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096816931] [2022-03-15 17:06:43,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:06:43,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:43,626 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:43,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 17:06:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:43,795 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 [2022-03-15 17:06:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:44,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:44,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:44,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:44,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096816931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:44,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:44,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:44,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933402890] [2022-03-15 17:06:44,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:44,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:44,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:44,730 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:45,743 INFO L93 Difference]: Finished difference Result 766 states and 1510 transitions. [2022-03-15 17:06:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 17:06:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:45,744 INFO L225 Difference]: With dead ends: 766 [2022-03-15 17:06:45,744 INFO L226 Difference]: Without dead ends: 749 [2022-03-15 17:06:45,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:06:45,744 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:45,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 351 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 989 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2022-03-15 17:06:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-15 17:06:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 415. [2022-03-15 17:06:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.9855072463768115) internal successors, (822), 414 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 822 transitions. [2022-03-15 17:06:45,749 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 822 transitions. Word has length 30 [2022-03-15 17:06:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:45,749 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 822 transitions. [2022-03-15 17:06:45,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 822 transitions. [2022-03-15 17:06:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:45,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:45,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:45,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:45,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:45,951 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1147893365, now seen corresponding path program 152 times [2022-03-15 17:06:45,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:45,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653933938] [2022-03-15 17:06:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:46,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:46,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653933938] [2022-03-15 17:06:46,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653933938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:46,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562196023] [2022-03-15 17:06:46,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:06:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:46,266 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:46,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 17:06:46,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:06:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:46,435 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 [2022-03-15 17:06:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:46,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:47,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:47,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:47,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562196023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:47,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:47,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:47,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449636456] [2022-03-15 17:06:47,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:47,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:47,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:47,368 INFO L87 Difference]: Start difference. First operand 415 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:48,452 INFO L93 Difference]: Finished difference Result 754 states and 1486 transitions. [2022-03-15 17:06:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 17:06:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:48,453 INFO L225 Difference]: With dead ends: 754 [2022-03-15 17:06:48,453 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 17:06:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:06:48,454 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 983 Invalid, 0 Unknown, 212 Unchecked, 0.4s Time] [2022-03-15 17:06:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 17:06:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 399. [2022-03-15 17:06:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2022-03-15 17:06:48,459 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2022-03-15 17:06:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:48,459 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2022-03-15 17:06:48,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2022-03-15 17:06:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:48,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:48,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:48,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:48,660 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1234330325, now seen corresponding path program 153 times [2022-03-15 17:06:48,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:48,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006829922] [2022-03-15 17:06:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:48,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:48,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006829922] [2022-03-15 17:06:48,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006829922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:48,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821063231] [2022-03-15 17:06:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:06:48,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:49,000 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 17:06:49,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:06:49,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:49,169 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 15 treesize of output 7 [2022-03-15 17:06:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:49,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:50,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:50,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:50,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821063231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:50,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:50,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:06:50,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721415782] [2022-03-15 17:06:50,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:50,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:06:50,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:06:50,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:06:50,230 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:51,513 INFO L93 Difference]: Finished difference Result 752 states and 1486 transitions. [2022-03-15 17:06:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:06:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:51,514 INFO L225 Difference]: With dead ends: 752 [2022-03-15 17:06:51,514 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 17:06:51,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=425, Invalid=3865, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:06:51,515 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:51,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 514 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1394 Invalid, 0 Unknown, 309 Unchecked, 0.6s Time] [2022-03-15 17:06:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 17:06:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 394. [2022-03-15 17:06:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-03-15 17:06:51,520 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-03-15 17:06:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:51,520 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-03-15 17:06:51,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-03-15 17:06:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:51,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:51,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:51,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:51,721 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1602804433, now seen corresponding path program 154 times [2022-03-15 17:06:51,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:51,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10707537] [2022-03-15 17:06:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:52,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:52,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10707537] [2022-03-15 17:06:52,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10707537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:52,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107641930] [2022-03-15 17:06:52,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:06:52,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:52,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:52,045 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:52,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 17:06:52,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:06:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:06:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:52,240 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 15 treesize of output 7 [2022-03-15 17:06:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:52,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:53,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:53,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:53,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107641930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:53,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:53,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:53,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741948060] [2022-03-15 17:06:53,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:53,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:53,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:53,188 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:54,870 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-03-15 17:06:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:06:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:54,872 INFO L225 Difference]: With dead ends: 811 [2022-03-15 17:06:54,872 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 17:06:54,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:06:54,872 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:54,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:06:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 17:06:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 415. [2022-03-15 17:06:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2022-03-15 17:06:54,877 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2022-03-15 17:06:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:54,878 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2022-03-15 17:06:54,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2022-03-15 17:06:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:54,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:54,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:54,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:55,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 17:06:55,079 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash -720738709, now seen corresponding path program 155 times [2022-03-15 17:06:55,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:55,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409529232] [2022-03-15 17:06:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:55,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:55,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409529232] [2022-03-15 17:06:55,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409529232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:55,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776018978] [2022-03-15 17:06:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:06:55,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:55,405 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:55,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 17:06:55,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:06:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:06:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:55,598 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 [2022-03-15 17:06:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:56,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:56,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:56,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:56,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776018978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:56,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:56,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:06:56,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691230454] [2022-03-15 17:06:56,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:56,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:06:56,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:06:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:06:56,592 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:58,326 INFO L93 Difference]: Finished difference Result 695 states and 1378 transitions. [2022-03-15 17:06:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:06:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:06:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:58,327 INFO L225 Difference]: With dead ends: 695 [2022-03-15 17:06:58,327 INFO L226 Difference]: Without dead ends: 680 [2022-03-15 17:06:58,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=4075, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:06:58,327 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:58,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 386 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:06:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-03-15 17:06:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 413. [2022-03-15 17:06:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-03-15 17:06:58,333 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-03-15 17:06:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:58,333 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-03-15 17:06:58,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-03-15 17:06:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:06:58,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:58,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:58,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:58,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 17:06:58,540 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 747928009, now seen corresponding path program 156 times [2022-03-15 17:06:58,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:58,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120521546] [2022-03-15 17:06:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:58,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:58,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120521546] [2022-03-15 17:06:58,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120521546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:58,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648416509] [2022-03-15 17:06:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:06:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:58,862 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:58,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 17:06:58,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:06:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:06:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:59,053 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 [2022-03-15 17:06:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:59,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:59,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:06:59,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:06:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:59,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648416509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:59,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:59,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:06:59,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545317615] [2022-03-15 17:06:59,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:06:59,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:06:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:06:59,890 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:01,517 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-03-15 17:07:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:07:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:01,518 INFO L225 Difference]: With dead ends: 825 [2022-03-15 17:07:01,518 INFO L226 Difference]: Without dead ends: 788 [2022-03-15 17:07:01,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=463, Invalid=3959, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:07:01,519 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 170 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:01,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 464 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:07:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-15 17:07:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 411. [2022-03-15 17:07:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-03-15 17:07:01,524 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-03-15 17:07:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:01,524 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-03-15 17:07:01,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-03-15 17:07:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:01,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:01,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:01,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-15 17:07:01,726 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1669630149, now seen corresponding path program 157 times [2022-03-15 17:07:01,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:01,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454495806] [2022-03-15 17:07:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:01,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:02,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:02,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454495806] [2022-03-15 17:07:02,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454495806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:02,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130848663] [2022-03-15 17:07:02,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:07:02,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:02,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:02,059 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:02,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 17:07:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:02,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:02,250 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 15 treesize of output 7 [2022-03-15 17:07:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:02,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:02,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:02,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:03,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130848663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:03,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:03,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:03,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546625475] [2022-03-15 17:07:03,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:03,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:03,118 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:04,587 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-03-15 17:07:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:07:04,587 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:04,588 INFO L225 Difference]: With dead ends: 804 [2022-03-15 17:07:04,588 INFO L226 Difference]: Without dead ends: 761 [2022-03-15 17:07:04,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=442, Invalid=3848, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:07:04,589 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:04,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 451 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-03-15 17:07:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 399. [2022-03-15 17:07:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2022-03-15 17:07:04,594 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2022-03-15 17:07:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:04,594 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2022-03-15 17:07:04,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2022-03-15 17:07:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:04,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:04,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:04,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 17:07:04,795 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 394604629, now seen corresponding path program 158 times [2022-03-15 17:07:04,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:04,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509300362] [2022-03-15 17:07:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:05,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:05,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509300362] [2022-03-15 17:07:05,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509300362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:05,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922465133] [2022-03-15 17:07:05,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:07:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:05,120 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:05,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 17:07:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:05,316 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 [2022-03-15 17:07:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:05,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:06,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:06,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:07:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:06,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922465133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:06,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:06,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:07:06,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552937576] [2022-03-15 17:07:06,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:06,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:07:06,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:07:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:07:06,338 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:08,868 INFO L93 Difference]: Finished difference Result 969 states and 1901 transitions. [2022-03-15 17:07:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 17:07:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:08,869 INFO L225 Difference]: With dead ends: 969 [2022-03-15 17:07:08,869 INFO L226 Difference]: Without dead ends: 960 [2022-03-15 17:07:08,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=882, Invalid=6600, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 17:07:08,869 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 223 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:08,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 472 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:07:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-03-15 17:07:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 413. [2022-03-15 17:07:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2022-03-15 17:07:08,875 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2022-03-15 17:07:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:08,875 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2022-03-15 17:07:08,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2022-03-15 17:07:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:08,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:08,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:08,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 17:07:09,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:09,076 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1276670353, now seen corresponding path program 159 times [2022-03-15 17:07:09,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:09,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045412451] [2022-03-15 17:07:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:09,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:09,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045412451] [2022-03-15 17:07:09,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045412451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:09,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417155424] [2022-03-15 17:07:09,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:07:09,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:09,413 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:09,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 17:07:09,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:07:09,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:09,606 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 [2022-03-15 17:07:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:09,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:10,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:10,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:07:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:10,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417155424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:10,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:10,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:07:10,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148511873] [2022-03-15 17:07:10,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:10,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:07:10,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:07:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:07:10,651 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:13,340 INFO L93 Difference]: Finished difference Result 869 states and 1715 transitions. [2022-03-15 17:07:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 17:07:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:13,342 INFO L225 Difference]: With dead ends: 869 [2022-03-15 17:07:13,342 INFO L226 Difference]: Without dead ends: 854 [2022-03-15 17:07:13,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=916, Invalid=6394, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 17:07:13,342 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:13,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 409 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:07:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-03-15 17:07:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 411. [2022-03-15 17:07:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-03-15 17:07:13,348 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-03-15 17:07:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:13,348 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-03-15 17:07:13,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-03-15 17:07:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:13,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:13,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:13,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:13,549 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1549630225, now seen corresponding path program 160 times [2022-03-15 17:07:13,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:13,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326112678] [2022-03-15 17:07:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:13,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:13,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:13,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326112678] [2022-03-15 17:07:13,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326112678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:13,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837582686] [2022-03-15 17:07:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:07:13,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:13,893 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 17:07:13,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:07:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:14,080 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 15 treesize of output 7 [2022-03-15 17:07:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:14,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:14,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:14,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:15,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837582686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:15,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:15,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:07:15,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713139252] [2022-03-15 17:07:15,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:15,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:07:15,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:07:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:07:15,035 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:17,064 INFO L93 Difference]: Finished difference Result 892 states and 1752 transitions. [2022-03-15 17:07:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 17:07:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:17,066 INFO L225 Difference]: With dead ends: 892 [2022-03-15 17:07:17,066 INFO L226 Difference]: Without dead ends: 831 [2022-03-15 17:07:17,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=590, Invalid=4812, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:07:17,066 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:17,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 446 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1808 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-03-15 17:07:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-15 17:07:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 410. [2022-03-15 17:07:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-03-15 17:07:17,072 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-03-15 17:07:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:17,072 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-03-15 17:07:17,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-03-15 17:07:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:17,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:17,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:17,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 17:07:17,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:17,273 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -661011835, now seen corresponding path program 161 times [2022-03-15 17:07:17,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:17,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843471189] [2022-03-15 17:07:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:17,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:17,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843471189] [2022-03-15 17:07:17,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843471189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:17,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749349774] [2022-03-15 17:07:17,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:07:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:17,599 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:17,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 17:07:17,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:17,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:17,795 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 15 treesize of output 7 [2022-03-15 17:07:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:18,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:18,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:18,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:18,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749349774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:18,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:18,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:18,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703140119] [2022-03-15 17:07:18,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:18,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:18,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:18,687 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:19,986 INFO L93 Difference]: Finished difference Result 799 states and 1569 transitions. [2022-03-15 17:07:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:07:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:19,987 INFO L225 Difference]: With dead ends: 799 [2022-03-15 17:07:19,987 INFO L226 Difference]: Without dead ends: 790 [2022-03-15 17:07:19,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=397, Invalid=3635, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:07:19,988 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:19,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 368 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-15 17:07:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 412. [2022-03-15 17:07:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2022-03-15 17:07:19,993 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2022-03-15 17:07:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2022-03-15 17:07:19,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2022-03-15 17:07:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:19,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:19,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:20,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:20,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:20,195 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash 221053889, now seen corresponding path program 162 times [2022-03-15 17:07:20,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:20,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125792783] [2022-03-15 17:07:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:20,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:20,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125792783] [2022-03-15 17:07:20,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125792783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:20,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505211008] [2022-03-15 17:07:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:07:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:20,528 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 17:07:20,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:07:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:20,726 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 [2022-03-15 17:07:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:21,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:21,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:21,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:21,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505211008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:21,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:21,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:21,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251964328] [2022-03-15 17:07:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:21,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:21,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:21,757 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:23,266 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-03-15 17:07:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:07:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:23,267 INFO L225 Difference]: With dead ends: 671 [2022-03-15 17:07:23,267 INFO L226 Difference]: Without dead ends: 648 [2022-03-15 17:07:23,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=421, Invalid=3611, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:07:23,267 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 146 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:23,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 389 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-15 17:07:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 402. [2022-03-15 17:07:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2022-03-15 17:07:23,274 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2022-03-15 17:07:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:23,274 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2022-03-15 17:07:23,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2022-03-15 17:07:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:23,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:23,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:23,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 17:07:23,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:23,495 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash -656953761, now seen corresponding path program 163 times [2022-03-15 17:07:23,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:23,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907978132] [2022-03-15 17:07:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:23,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:23,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907978132] [2022-03-15 17:07:23,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907978132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:23,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783550233] [2022-03-15 17:07:23,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:07:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:23,818 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:23,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 17:07:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:23,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:23,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:24,015 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 [2022-03-15 17:07:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:24,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:24,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:24,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:24,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783550233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:24,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:24,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:24,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200545931] [2022-03-15 17:07:24,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:24,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:24,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:24,960 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:26,178 INFO L93 Difference]: Finished difference Result 793 states and 1565 transitions. [2022-03-15 17:07:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:07:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:26,179 INFO L225 Difference]: With dead ends: 793 [2022-03-15 17:07:26,179 INFO L226 Difference]: Without dead ends: 776 [2022-03-15 17:07:26,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:07:26,180 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:26,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 388 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1237 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-03-15 17:07:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-15 17:07:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 416. [2022-03-15 17:07:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9855421686746988) internal successors, (824), 415 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 824 transitions. [2022-03-15 17:07:26,185 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 824 transitions. Word has length 30 [2022-03-15 17:07:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:26,185 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 824 transitions. [2022-03-15 17:07:26,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 824 transitions. [2022-03-15 17:07:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:26,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:26,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:26,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:26,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:26,386 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1212067835, now seen corresponding path program 164 times [2022-03-15 17:07:26,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:26,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751980022] [2022-03-15 17:07:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:26,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:26,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751980022] [2022-03-15 17:07:26,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751980022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:26,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928537829] [2022-03-15 17:07:26,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:07:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:26,705 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:26,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 17:07:26,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:26,902 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 15 treesize of output 7 [2022-03-15 17:07:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:27,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:27,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:27,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:27,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928537829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:27,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:27,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:27,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629966811] [2022-03-15 17:07:27,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:27,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:27,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:27,827 INFO L87 Difference]: Start difference. First operand 416 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:29,023 INFO L93 Difference]: Finished difference Result 739 states and 1454 transitions. [2022-03-15 17:07:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:07:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:29,024 INFO L225 Difference]: With dead ends: 739 [2022-03-15 17:07:29,024 INFO L226 Difference]: Without dead ends: 718 [2022-03-15 17:07:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=359, Invalid=3181, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:07:29,025 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 100 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 531 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1500 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-03-15 17:07:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-15 17:07:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 398. [2022-03-15 17:07:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2022-03-15 17:07:29,030 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2022-03-15 17:07:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:29,030 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2022-03-15 17:07:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2022-03-15 17:07:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:29,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:29,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:29,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:29,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-15 17:07:29,231 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -826199227, now seen corresponding path program 165 times [2022-03-15 17:07:29,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:29,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661679405] [2022-03-15 17:07:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:29,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:29,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661679405] [2022-03-15 17:07:29,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661679405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:29,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764418084] [2022-03-15 17:07:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:07:29,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:29,546 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:29,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 17:07:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:07:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:29,741 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 [2022-03-15 17:07:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:30,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:30,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:30,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:07:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:30,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764418084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:30,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:30,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 17:07:30,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367766326] [2022-03-15 17:07:30,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:07:30,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:07:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:07:30,757 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:33,226 INFO L93 Difference]: Finished difference Result 925 states and 1817 transitions. [2022-03-15 17:07:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 17:07:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:33,228 INFO L225 Difference]: With dead ends: 925 [2022-03-15 17:07:33,228 INFO L226 Difference]: Without dead ends: 916 [2022-03-15 17:07:33,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=988, Invalid=7022, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 17:07:33,229 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 271 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:33,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 419 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:07:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-03-15 17:07:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 413. [2022-03-15 17:07:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-03-15 17:07:33,235 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-03-15 17:07:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:33,235 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-03-15 17:07:33,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-03-15 17:07:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:33,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:33,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:33,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:33,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-15 17:07:33,436 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash 55866497, now seen corresponding path program 166 times [2022-03-15 17:07:33,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:33,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637924790] [2022-03-15 17:07:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:33,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:33,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637924790] [2022-03-15 17:07:33,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637924790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:33,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748082882] [2022-03-15 17:07:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:07:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:33,756 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 17:07:33,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:07:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:33,952 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 15 treesize of output 7 [2022-03-15 17:07:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:34,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:34,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:34,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:34,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748082882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:34,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:34,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:34,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016333694] [2022-03-15 17:07:34,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:34,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:34,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:34,942 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:37,352 INFO L93 Difference]: Finished difference Result 706 states and 1397 transitions. [2022-03-15 17:07:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 17:07:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:37,353 INFO L225 Difference]: With dead ends: 706 [2022-03-15 17:07:37,353 INFO L226 Difference]: Without dead ends: 691 [2022-03-15 17:07:37,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=654, Invalid=5046, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:07:37,354 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 208 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:37,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 413 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:07:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-15 17:07:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 411. [2022-03-15 17:07:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-03-15 17:07:37,360 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-03-15 17:07:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:37,361 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-03-15 17:07:37,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-03-15 17:07:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:37,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:37,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:37,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-15 17:07:37,575 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1524533215, now seen corresponding path program 167 times [2022-03-15 17:07:37,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:37,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879167438] [2022-03-15 17:07:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:37,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:37,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879167438] [2022-03-15 17:07:37,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879167438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:37,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122163626] [2022-03-15 17:07:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:07:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:37,890 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:37,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 17:07:37,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:07:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:37,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:38,121 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 [2022-03-15 17:07:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:38,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:38,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:38,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:07:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:39,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122163626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:39,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:39,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:07:39,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264483700] [2022-03-15 17:07:39,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:39,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:07:39,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:07:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:07:39,093 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:41,597 INFO L93 Difference]: Finished difference Result 945 states and 1850 transitions. [2022-03-15 17:07:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 17:07:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:41,599 INFO L225 Difference]: With dead ends: 945 [2022-03-15 17:07:41,599 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 17:07:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 17:07:41,600 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:41,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 458 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:07:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 17:07:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 410. [2022-03-15 17:07:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2022-03-15 17:07:41,611 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2022-03-15 17:07:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:41,611 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2022-03-15 17:07:41,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2022-03-15 17:07:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:41,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:41,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:41,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:41,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:41,812 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815691, now seen corresponding path program 168 times [2022-03-15 17:07:41,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:41,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798756129] [2022-03-15 17:07:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:41,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:42,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:42,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798756129] [2022-03-15 17:07:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798756129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:42,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184620069] [2022-03-15 17:07:42,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:07:42,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:42,132 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:42,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 17:07:42,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:07:42,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:42,327 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 [2022-03-15 17:07:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:42,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:43,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:43,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:43,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184620069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:43,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:43,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:43,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375704541] [2022-03-15 17:07:43,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:43,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:43,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:43,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:43,294 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:44,802 INFO L93 Difference]: Finished difference Result 798 states and 1567 transitions. [2022-03-15 17:07:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:07:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:44,803 INFO L225 Difference]: With dead ends: 798 [2022-03-15 17:07:44,803 INFO L226 Difference]: Without dead ends: 789 [2022-03-15 17:07:44,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=484, Invalid=4208, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:07:44,803 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:44,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 291 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-15 17:07:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 412. [2022-03-15 17:07:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2022-03-15 17:07:44,808 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2022-03-15 17:07:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2022-03-15 17:07:44,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2022-03-15 17:07:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:44,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:44,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:44,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:45,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:45,010 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash -999749967, now seen corresponding path program 169 times [2022-03-15 17:07:45,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:45,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517818769] [2022-03-15 17:07:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:45,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:45,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517818769] [2022-03-15 17:07:45,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517818769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:45,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045069659] [2022-03-15 17:07:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:07:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:45,337 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:45,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 17:07:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:45,532 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 15 treesize of output 7 [2022-03-15 17:07:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:45,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:46,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:46,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:46,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045069659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:46,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:46,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:46,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69587967] [2022-03-15 17:07:46,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:46,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:46,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:46,455 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:48,172 INFO L93 Difference]: Finished difference Result 653 states and 1290 transitions. [2022-03-15 17:07:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:07:48,173 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:48,174 INFO L225 Difference]: With dead ends: 653 [2022-03-15 17:07:48,174 INFO L226 Difference]: Without dead ends: 630 [2022-03-15 17:07:48,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:07:48,174 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:48,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 323 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-15 17:07:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 402. [2022-03-15 17:07:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-03-15 17:07:48,178 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-03-15 17:07:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:48,179 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-03-15 17:07:48,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-03-15 17:07:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:48,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:48,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:48,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:48,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:48,380 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1877757617, now seen corresponding path program 170 times [2022-03-15 17:07:48,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:48,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268035546] [2022-03-15 17:07:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:48,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:48,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268035546] [2022-03-15 17:07:48,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268035546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:48,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595925875] [2022-03-15 17:07:48,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:07:48,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:48,691 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 17:07:48,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:48,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:48,883 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 15 treesize of output 7 [2022-03-15 17:07:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:49,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:49,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:49,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595925875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:49,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:49,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:49,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144909840] [2022-03-15 17:07:49,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:49,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:49,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:49,794 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:51,371 INFO L93 Difference]: Finished difference Result 795 states and 1568 transitions. [2022-03-15 17:07:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 17:07:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:51,372 INFO L225 Difference]: With dead ends: 795 [2022-03-15 17:07:51,372 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 17:07:51,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:07:51,373 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 163 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:51,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 418 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:07:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 17:07:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 399. [2022-03-15 17:07:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2022-03-15 17:07:51,380 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2022-03-15 17:07:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:51,380 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2022-03-15 17:07:51,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2022-03-15 17:07:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:51,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:51,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:51,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:51,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:51,600 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1391620113, now seen corresponding path program 171 times [2022-03-15 17:07:51,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:51,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676953977] [2022-03-15 17:07:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:51,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676953977] [2022-03-15 17:07:51,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676953977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:51,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791575305] [2022-03-15 17:07:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:07:51,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:51,927 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:51,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 17:07:51,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:07:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:52,123 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 [2022-03-15 17:07:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:52,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:52,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:52,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:53,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791575305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:53,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:53,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:53,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820712043] [2022-03-15 17:07:53,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:53,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:53,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:53,072 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:54,471 INFO L93 Difference]: Finished difference Result 794 states and 1560 transitions. [2022-03-15 17:07:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:07:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:54,472 INFO L225 Difference]: With dead ends: 794 [2022-03-15 17:07:54,473 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 17:07:54,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=3756, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:07:54,473 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:54,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 438 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:07:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 17:07:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 413. [2022-03-15 17:07:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-03-15 17:07:54,478 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-03-15 17:07:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:54,479 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-03-15 17:07:54,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-03-15 17:07:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:54,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:54,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:54,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:54,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-15 17:07:54,680 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash -509554389, now seen corresponding path program 172 times [2022-03-15 17:07:54,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:54,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073956790] [2022-03-15 17:07:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:55,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:55,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073956790] [2022-03-15 17:07:55,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073956790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:55,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445419174] [2022-03-15 17:07:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:07:55,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:55,028 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 17:07:55,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:07:55,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:55,226 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 15 treesize of output 7 [2022-03-15 17:07:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:55,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:55,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:56,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445419174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:56,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:56,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:07:56,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925384069] [2022-03-15 17:07:56,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:56,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:07:56,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:07:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:07:56,132 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:57,739 INFO L93 Difference]: Finished difference Result 672 states and 1328 transitions. [2022-03-15 17:07:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:07:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:07:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:57,740 INFO L225 Difference]: With dead ends: 672 [2022-03-15 17:07:57,741 INFO L226 Difference]: Without dead ends: 657 [2022-03-15 17:07:57,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=430, Invalid=3730, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:07:57,741 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:57,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 457 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:07:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-15 17:07:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 411. [2022-03-15 17:07:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-03-15 17:07:57,748 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-03-15 17:07:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:57,748 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-03-15 17:07:57,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-03-15 17:07:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:07:57,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:57,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:57,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:57,972 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash 959112329, now seen corresponding path program 173 times [2022-03-15 17:07:57,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:57,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113385941] [2022-03-15 17:07:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:58,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:58,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113385941] [2022-03-15 17:07:58,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113385941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:58,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229229836] [2022-03-15 17:07:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:07:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:58,298 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:58,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 17:07:58,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:07:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:58,524 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 15 treesize of output 7 [2022-03-15 17:07:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:58,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:59,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:07:59,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:07:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:59,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229229836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:59,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:59,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:07:59,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847032402] [2022-03-15 17:07:59,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:07:59,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:07:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:07:59,455 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:00,727 INFO L93 Difference]: Finished difference Result 719 states and 1409 transitions. [2022-03-15 17:08:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:08:00,728 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:00,729 INFO L225 Difference]: With dead ends: 719 [2022-03-15 17:08:00,729 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 17:08:00,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:08:00,729 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:00,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 505 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1683 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2022-03-15 17:08:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 17:08:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 425. [2022-03-15 17:08:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.9858490566037736) internal successors, (842), 424 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 842 transitions. [2022-03-15 17:08:00,734 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 842 transitions. Word has length 30 [2022-03-15 17:08:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:00,734 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 842 transitions. [2022-03-15 17:08:00,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 842 transitions. [2022-03-15 17:08:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:00,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:00,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:00,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:00,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:00,935 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1936553865, now seen corresponding path program 174 times [2022-03-15 17:08:00,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:00,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077667201] [2022-03-15 17:08:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:01,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:01,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077667201] [2022-03-15 17:08:01,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077667201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:01,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321114423] [2022-03-15 17:08:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:08:01,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:01,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:01,255 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:01,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 17:08:01,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:08:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:01,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:01,440 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 [2022-03-15 17:08:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:02,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:02,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:02,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321114423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:02,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:02,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:08:02,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493676052] [2022-03-15 17:08:02,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:02,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:08:02,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:08:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:08:02,293 INFO L87 Difference]: Start difference. First operand 425 states and 842 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:03,586 INFO L93 Difference]: Finished difference Result 780 states and 1536 transitions. [2022-03-15 17:08:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:08:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:03,588 INFO L225 Difference]: With dead ends: 780 [2022-03-15 17:08:03,588 INFO L226 Difference]: Without dead ends: 748 [2022-03-15 17:08:03,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:08:03,588 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:03,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 493 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:08:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-15 17:08:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 403. [2022-03-15 17:08:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2022-03-15 17:08:03,595 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2022-03-15 17:08:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:03,595 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2022-03-15 17:08:03,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2022-03-15 17:08:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:03,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:03,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:03,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-15 17:08:03,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:03,796 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1387562039, now seen corresponding path program 175 times [2022-03-15 17:08:03,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:03,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449147906] [2022-03-15 17:08:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:04,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449147906] [2022-03-15 17:08:04,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449147906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068108252] [2022-03-15 17:08:04,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:08:04,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:04,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:04,136 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:04,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 17:08:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:04,332 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 [2022-03-15 17:08:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:04,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:05,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:05,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:05,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068108252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:05,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:05,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:05,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106380630] [2022-03-15 17:08:05,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:05,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:05,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:05,239 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:06,369 INFO L93 Difference]: Finished difference Result 776 states and 1531 transitions. [2022-03-15 17:08:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 17:08:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:06,371 INFO L225 Difference]: With dead ends: 776 [2022-03-15 17:08:06,371 INFO L226 Difference]: Without dead ends: 743 [2022-03-15 17:08:06,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:08:06,371 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 139 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 357 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:08:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-03-15 17:08:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 401. [2022-03-15 17:08:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-03-15 17:08:06,376 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-03-15 17:08:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:06,376 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-03-15 17:08:06,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-03-15 17:08:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:06,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:06,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:06,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:06,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:06,577 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash 567896517, now seen corresponding path program 176 times [2022-03-15 17:08:06,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:06,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602287143] [2022-03-15 17:08:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:06,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:06,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602287143] [2022-03-15 17:08:06,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602287143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:06,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745860091] [2022-03-15 17:08:06,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:08:06,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:06,943 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:06,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 17:08:06,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:08:06,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:07,143 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 15 treesize of output 7 [2022-03-15 17:08:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:07,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:07,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:07,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:08,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745860091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:08,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:08,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:08:08,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404888080] [2022-03-15 17:08:08,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:08,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:08:08,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:08:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:08:08,144 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:09,349 INFO L93 Difference]: Finished difference Result 752 states and 1483 transitions. [2022-03-15 17:08:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 17:08:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:09,350 INFO L225 Difference]: With dead ends: 752 [2022-03-15 17:08:09,351 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 17:08:09,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 17:08:09,351 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:09,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 501 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1426 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-03-15 17:08:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 17:08:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 417. [2022-03-15 17:08:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9831730769230769) internal successors, (825), 416 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 825 transitions. [2022-03-15 17:08:09,356 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 825 transitions. Word has length 30 [2022-03-15 17:08:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:09,356 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 825 transitions. [2022-03-15 17:08:09,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 825 transitions. [2022-03-15 17:08:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:09,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:09,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:09,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:09,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:09,557 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1858049183, now seen corresponding path program 177 times [2022-03-15 17:08:09,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:09,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904404888] [2022-03-15 17:08:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:09,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:09,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904404888] [2022-03-15 17:08:09,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904404888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:09,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150822142] [2022-03-15 17:08:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:08:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:09,909 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:09,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 17:08:09,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:08:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:10,111 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 15 treesize of output 7 [2022-03-15 17:08:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:10,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:10,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:10,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:11,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150822142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:11,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:11,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:08:11,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651236784] [2022-03-15 17:08:11,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:11,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:08:11,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:08:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:08:11,074 INFO L87 Difference]: Start difference. First operand 417 states and 825 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:12,434 INFO L93 Difference]: Finished difference Result 749 states and 1481 transitions. [2022-03-15 17:08:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 17:08:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:12,435 INFO L225 Difference]: With dead ends: 749 [2022-03-15 17:08:12,435 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 17:08:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=3880, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 17:08:12,435 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:12,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 513 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:08:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 17:08:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 397. [2022-03-15 17:08:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-03-15 17:08:12,440 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-03-15 17:08:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-03-15 17:08:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-03-15 17:08:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:12,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:12,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:12,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:12,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 17:08:12,642 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 854882193, now seen corresponding path program 178 times [2022-03-15 17:08:12,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:12,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830017431] [2022-03-15 17:08:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:12,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:12,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830017431] [2022-03-15 17:08:12,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830017431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:12,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94202302] [2022-03-15 17:08:12,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:08:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:12,961 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 17:08:12,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:08:12,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:12,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:13,183 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 15 treesize of output 7 [2022-03-15 17:08:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:13,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:13,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:14,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94202302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:14,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:14,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:14,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769064073] [2022-03-15 17:08:14,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:14,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:14,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:14,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:14,044 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:16,659 INFO L93 Difference]: Finished difference Result 978 states and 1927 transitions. [2022-03-15 17:08:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 17:08:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:16,661 INFO L225 Difference]: With dead ends: 978 [2022-03-15 17:08:16,661 INFO L226 Difference]: Without dead ends: 969 [2022-03-15 17:08:16,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=739, Invalid=6067, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 17:08:16,661 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:16,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 450 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:08:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-03-15 17:08:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 415. [2022-03-15 17:08:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0193236714975846) internal successors, (836), 414 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 836 transitions. [2022-03-15 17:08:16,667 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 836 transitions. Word has length 30 [2022-03-15 17:08:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:16,668 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 836 transitions. [2022-03-15 17:08:16,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 836 transitions. [2022-03-15 17:08:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:16,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:16,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:16,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:16,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-15 17:08:16,870 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1736947917, now seen corresponding path program 179 times [2022-03-15 17:08:16,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:16,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334145387] [2022-03-15 17:08:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:17,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:17,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334145387] [2022-03-15 17:08:17,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334145387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:17,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634671211] [2022-03-15 17:08:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:08:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:17,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:17,192 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:17,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 17:08:17,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:08:17,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:08:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:17,418 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 [2022-03-15 17:08:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:17,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:18,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:18,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:18,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634671211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:18,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:18,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:18,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731528615] [2022-03-15 17:08:18,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:18,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:18,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:18,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:18,385 INFO L87 Difference]: Start difference. First operand 415 states and 836 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:21,223 INFO L93 Difference]: Finished difference Result 816 states and 1607 transitions. [2022-03-15 17:08:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 17:08:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:21,225 INFO L225 Difference]: With dead ends: 816 [2022-03-15 17:08:21,225 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 17:08:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=776, Invalid=6196, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 17:08:21,225 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:21,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 451 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2305 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-03-15 17:08:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 17:08:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 413. [2022-03-15 17:08:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0194174757281553) internal successors, (832), 412 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 832 transitions. [2022-03-15 17:08:21,231 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 832 transitions. Word has length 30 [2022-03-15 17:08:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:21,231 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 832 transitions. [2022-03-15 17:08:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 832 transitions. [2022-03-15 17:08:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:21,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:21,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:21,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:21,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:21,434 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1089352661, now seen corresponding path program 180 times [2022-03-15 17:08:21,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:21,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296953058] [2022-03-15 17:08:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:21,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:21,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296953058] [2022-03-15 17:08:21,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296953058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:21,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583196419] [2022-03-15 17:08:21,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:08:21,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:21,766 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:21,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 17:08:21,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:08:21,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:21,988 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 [2022-03-15 17:08:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:22,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:22,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:22,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:08:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:22,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583196419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:22,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:22,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:08:22,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563491405] [2022-03-15 17:08:22,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:08:22,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:08:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:08:22,928 INFO L87 Difference]: Start difference. First operand 413 states and 832 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:26,008 INFO L93 Difference]: Finished difference Result 1107 states and 2170 transitions. [2022-03-15 17:08:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 17:08:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:26,010 INFO L225 Difference]: With dead ends: 1107 [2022-03-15 17:08:26,010 INFO L226 Difference]: Without dead ends: 1055 [2022-03-15 17:08:26,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1198, Invalid=8114, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 17:08:26,011 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 326 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:26,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 489 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 17:08:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-15 17:08:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 412. [2022-03-15 17:08:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2022-03-15 17:08:26,017 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2022-03-15 17:08:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:26,017 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2022-03-15 17:08:26,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2022-03-15 17:08:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:26,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:26,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:26,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:26,218 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash -200734271, now seen corresponding path program 181 times [2022-03-15 17:08:26,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:26,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502416450] [2022-03-15 17:08:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:26,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:26,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502416450] [2022-03-15 17:08:26,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502416450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:26,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713905520] [2022-03-15 17:08:26,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:08:26,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:26,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:26,540 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:26,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 17:08:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:26,765 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 15 treesize of output 7 [2022-03-15 17:08:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:27,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:27,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:27,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:27,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713905520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:27,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:27,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:27,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209194648] [2022-03-15 17:08:27,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:27,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:27,632 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:29,503 INFO L93 Difference]: Finished difference Result 851 states and 1676 transitions. [2022-03-15 17:08:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 17:08:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:29,505 INFO L225 Difference]: With dead ends: 851 [2022-03-15 17:08:29,505 INFO L226 Difference]: Without dead ends: 842 [2022-03-15 17:08:29,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=547, Invalid=4855, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:08:29,505 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 192 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:29,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 357 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:08:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-15 17:08:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 414. [2022-03-15 17:08:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2022-03-15 17:08:29,511 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2022-03-15 17:08:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:29,511 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2022-03-15 17:08:29,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2022-03-15 17:08:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:29,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:29,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:29,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-15 17:08:29,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:29,713 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash 681331453, now seen corresponding path program 182 times [2022-03-15 17:08:29,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:29,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061846757] [2022-03-15 17:08:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:29,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:30,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:30,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061846757] [2022-03-15 17:08:30,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061846757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:30,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843428240] [2022-03-15 17:08:30,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:08:30,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:30,056 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:30,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 17:08:30,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:08:30,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:30,284 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 [2022-03-15 17:08:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:30,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:31,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:31,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:31,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843428240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:31,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:31,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:31,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994591066] [2022-03-15 17:08:31,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:31,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:31,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:31,186 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:34,146 INFO L93 Difference]: Finished difference Result 992 states and 1978 transitions. [2022-03-15 17:08:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 17:08:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:34,147 INFO L225 Difference]: With dead ends: 992 [2022-03-15 17:08:34,147 INFO L226 Difference]: Without dead ends: 959 [2022-03-15 17:08:34,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=722, Invalid=6084, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 17:08:34,148 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:34,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 540 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2425 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2022-03-15 17:08:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-15 17:08:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 404. [2022-03-15 17:08:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-03-15 17:08:34,154 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-03-15 17:08:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:34,154 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-03-15 17:08:34,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-03-15 17:08:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:34,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:34,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:34,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:34,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:34,355 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -196676197, now seen corresponding path program 183 times [2022-03-15 17:08:34,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:34,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642383047] [2022-03-15 17:08:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:34,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:34,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642383047] [2022-03-15 17:08:34,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642383047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:34,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768730319] [2022-03-15 17:08:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:08:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:34,685 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 17:08:34,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:08:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:34,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:34,907 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 15 treesize of output 7 [2022-03-15 17:08:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:35,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:35,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:35,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:35,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768730319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:35,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:35,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:35,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861167704] [2022-03-15 17:08:35,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:35,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:35,763 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:37,793 INFO L93 Difference]: Finished difference Result 832 states and 1644 transitions. [2022-03-15 17:08:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 17:08:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:37,794 INFO L225 Difference]: With dead ends: 832 [2022-03-15 17:08:37,794 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 17:08:37,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=597, Invalid=5103, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:08:37,795 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 168 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:37,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 507 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1724 Invalid, 0 Unknown, 348 Unchecked, 0.7s Time] [2022-03-15 17:08:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 17:08:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 418. [2022-03-15 17:08:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9952038369304557) internal successors, (832), 417 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 832 transitions. [2022-03-15 17:08:37,800 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 832 transitions. Word has length 30 [2022-03-15 17:08:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:37,800 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 832 transitions. [2022-03-15 17:08:37,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 832 transitions. [2022-03-15 17:08:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:37,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:37,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:37,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:38,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:38,001 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1672345399, now seen corresponding path program 184 times [2022-03-15 17:08:38,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:38,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073508838] [2022-03-15 17:08:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:38,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:38,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:38,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073508838] [2022-03-15 17:08:38,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073508838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:38,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174128054] [2022-03-15 17:08:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:08:38,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:38,319 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:38,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 17:08:38,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:08:38,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:38,546 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 [2022-03-15 17:08:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:38,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:39,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:39,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:39,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174128054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:39,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:39,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:39,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362793875] [2022-03-15 17:08:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:39,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:39,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:39,423 INFO L87 Difference]: Start difference. First operand 418 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:41,320 INFO L93 Difference]: Finished difference Result 836 states and 1653 transitions. [2022-03-15 17:08:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:08:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:41,322 INFO L225 Difference]: With dead ends: 836 [2022-03-15 17:08:41,322 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 17:08:41,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=548, Invalid=4708, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:08:41,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:41,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 408 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:08:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 17:08:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 401. [2022-03-15 17:08:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0175) internal successors, (807), 400 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 807 transitions. [2022-03-15 17:08:41,328 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 807 transitions. Word has length 30 [2022-03-15 17:08:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:41,328 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 807 transitions. [2022-03-15 17:08:41,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 807 transitions. [2022-03-15 17:08:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:41,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:41,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:41,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:41,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:41,529 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash 289461307, now seen corresponding path program 185 times [2022-03-15 17:08:41,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:41,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238085918] [2022-03-15 17:08:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:41,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:41,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:41,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238085918] [2022-03-15 17:08:41,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238085918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:41,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884767374] [2022-03-15 17:08:41,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:08:41,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:41,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:41,844 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:41,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 17:08:41,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:08:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:42,068 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 15 treesize of output 7 [2022-03-15 17:08:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:42,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:42,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:42,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884767374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:42,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:42,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:42,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409808656] [2022-03-15 17:08:42,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:42,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:42,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:43,000 INFO L87 Difference]: Start difference. First operand 401 states and 807 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:44,983 INFO L93 Difference]: Finished difference Result 850 states and 1672 transitions. [2022-03-15 17:08:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:08:44,984 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:44,985 INFO L225 Difference]: With dead ends: 850 [2022-03-15 17:08:44,985 INFO L226 Difference]: Without dead ends: 841 [2022-03-15 17:08:44,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 17:08:44,985 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:44,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 573 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:08:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-15 17:08:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2022-03-15 17:08:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0120772946859904) internal successors, (833), 414 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 833 transitions. [2022-03-15 17:08:44,991 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 833 transitions. Word has length 30 [2022-03-15 17:08:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 833 transitions. [2022-03-15 17:08:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 833 transitions. [2022-03-15 17:08:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:44,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:44,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:45,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:45,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:45,192 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1171527031, now seen corresponding path program 186 times [2022-03-15 17:08:45,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:45,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838176731] [2022-03-15 17:08:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:45,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:45,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:45,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838176731] [2022-03-15 17:08:45,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838176731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:45,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879874020] [2022-03-15 17:08:45,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:08:45,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:45,593 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:45,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 17:08:45,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:08:45,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:45,854 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 [2022-03-15 17:08:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:46,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:46,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:46,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:46,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879874020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:46,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:46,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:46,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000181181] [2022-03-15 17:08:46,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:46,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:46,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:46,745 INFO L87 Difference]: Start difference. First operand 415 states and 833 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:48,806 INFO L93 Difference]: Finished difference Result 721 states and 1421 transitions. [2022-03-15 17:08:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:08:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:48,807 INFO L225 Difference]: With dead ends: 721 [2022-03-15 17:08:48,807 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 17:08:48,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=527, Invalid=4875, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:08:48,807 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 187 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:48,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 443 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2071 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-03-15 17:08:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 17:08:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 413. [2022-03-15 17:08:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-03-15 17:08:48,812 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-03-15 17:08:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:48,812 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-03-15 17:08:48,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-03-15 17:08:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:48,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:48,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:48,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:49,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:49,013 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1654773547, now seen corresponding path program 187 times [2022-03-15 17:08:49,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:49,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266678075] [2022-03-15 17:08:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:49,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:49,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266678075] [2022-03-15 17:08:49,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266678075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:49,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357392035] [2022-03-15 17:08:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:08:49,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:49,334 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:49,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 17:08:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:49,543 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 15 treesize of output 7 [2022-03-15 17:08:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:49,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:50,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:50,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:50,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357392035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:50,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:50,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:08:50,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266539430] [2022-03-15 17:08:50,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:50,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:08:50,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:08:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:08:50,325 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:51,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:51,970 INFO L93 Difference]: Finished difference Result 849 states and 1674 transitions. [2022-03-15 17:08:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:08:51,970 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:51,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:51,971 INFO L225 Difference]: With dead ends: 849 [2022-03-15 17:08:51,971 INFO L226 Difference]: Without dead ends: 804 [2022-03-15 17:08:51,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=4091, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 17:08:51,972 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 164 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:51,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 456 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:08:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-15 17:08:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 405. [2022-03-15 17:08:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-03-15 17:08:51,982 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-03-15 17:08:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:51,982 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-03-15 17:08:51,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-03-15 17:08:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:51,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:51,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:52,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:52,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 17:08:52,202 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 293519381, now seen corresponding path program 188 times [2022-03-15 17:08:52,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:52,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239931405] [2022-03-15 17:08:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:52,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:52,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:52,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239931405] [2022-03-15 17:08:52,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239931405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:52,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553429661] [2022-03-15 17:08:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:08:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:52,513 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:52,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 17:08:52,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:08:52,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:52,742 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 [2022-03-15 17:08:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:53,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:53,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:53,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:53,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553429661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:53,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:53,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:08:53,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862429596] [2022-03-15 17:08:53,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:08:53,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:08:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:08:53,611 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:55,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:55,328 INFO L93 Difference]: Finished difference Result 832 states and 1643 transitions. [2022-03-15 17:08:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:08:55,329 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:55,330 INFO L225 Difference]: With dead ends: 832 [2022-03-15 17:08:55,330 INFO L226 Difference]: Without dead ends: 799 [2022-03-15 17:08:55,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=456, Invalid=4236, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:08:55,330 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:55,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 481 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:08:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-15 17:08:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 403. [2022-03-15 17:08:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-03-15 17:08:55,336 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-03-15 17:08:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:55,337 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-03-15 17:08:55,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-03-15 17:08:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:55,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:55,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:55,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 17:08:55,543 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2045989359, now seen corresponding path program 189 times [2022-03-15 17:08:55,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:55,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469200905] [2022-03-15 17:08:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:55,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:55,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469200905] [2022-03-15 17:08:55,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469200905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:55,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042628269] [2022-03-15 17:08:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:08:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:55,872 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:55,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 17:08:55,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:08:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:56,098 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 15 treesize of output 7 [2022-03-15 17:08:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:56,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:08:56,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:08:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:57,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042628269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:57,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:57,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:08:57,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582224992] [2022-03-15 17:08:57,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:08:57,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:08:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:08:57,026 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:58,993 INFO L93 Difference]: Finished difference Result 833 states and 1644 transitions. [2022-03-15 17:08:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:08:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:08:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:58,995 INFO L225 Difference]: With dead ends: 833 [2022-03-15 17:08:58,995 INFO L226 Difference]: Without dead ends: 797 [2022-03-15 17:08:58,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=481, Invalid=4775, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 17:08:58,995 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:58,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 667 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:08:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-03-15 17:08:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 400. [2022-03-15 17:08:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-03-15 17:08:59,001 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-03-15 17:08:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:59,001 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-03-15 17:08:59,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-03-15 17:08:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:08:59,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:59,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:59,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-15 17:08:59,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 17:08:59,202 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1389143995, now seen corresponding path program 190 times [2022-03-15 17:08:59,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:59,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409516251] [2022-03-15 17:08:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:59,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:59,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:59,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409516251] [2022-03-15 17:08:59,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409516251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:59,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862592991] [2022-03-15 17:08:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:08:59,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:59,555 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 17:08:59,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:08:59,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:59,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:08:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:59,804 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 15 treesize of output 7 [2022-03-15 17:09:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:00,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:00,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:00,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:00,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862592991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:00,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:00,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:09:00,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233196443] [2022-03-15 17:09:00,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:00,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:09:00,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:09:00,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:09:00,620 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:02,129 INFO L93 Difference]: Finished difference Result 841 states and 1649 transitions. [2022-03-15 17:09:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:09:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:02,130 INFO L225 Difference]: With dead ends: 841 [2022-03-15 17:09:02,130 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 17:09:02,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:09:02,131 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:02,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 442 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:09:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 17:09:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 429. [2022-03-15 17:09:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0093457943925235) internal successors, (860), 428 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 860 transitions. [2022-03-15 17:09:02,137 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 860 transitions. Word has length 30 [2022-03-15 17:09:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 860 transitions. [2022-03-15 17:09:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 860 transitions. [2022-03-15 17:09:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:02,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:02,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:02,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:02,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 17:09:02,359 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash -507078271, now seen corresponding path program 191 times [2022-03-15 17:09:02,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:02,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896693249] [2022-03-15 17:09:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:02,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896693249] [2022-03-15 17:09:02,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896693249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383207452] [2022-03-15 17:09:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:09:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:02,678 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 17:09:02,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:09:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:09:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:02,927 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 [2022-03-15 17:09:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:03,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:03,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:03,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:03,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383207452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:03,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:03,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:09:03,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240917060] [2022-03-15 17:09:03,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:03,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:09:03,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:09:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:09:03,763 INFO L87 Difference]: Start difference. First operand 429 states and 860 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:05,589 INFO L93 Difference]: Finished difference Result 687 states and 1351 transitions. [2022-03-15 17:09:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:09:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:05,590 INFO L225 Difference]: With dead ends: 687 [2022-03-15 17:09:05,590 INFO L226 Difference]: Without dead ends: 672 [2022-03-15 17:09:05,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=4386, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 17:09:05,591 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:05,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 451 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:09:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-03-15 17:09:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 425. [2022-03-15 17:09:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2022-03-15 17:09:05,596 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 30 [2022-03-15 17:09:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:05,596 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2022-03-15 17:09:05,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2022-03-15 17:09:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:05,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:05,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:05,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:05,797 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash 961588447, now seen corresponding path program 192 times [2022-03-15 17:09:05,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:05,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951768197] [2022-03-15 17:09:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:06,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:06,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951768197] [2022-03-15 17:09:06,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951768197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:06,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513818730] [2022-03-15 17:09:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:09:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:06,112 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:06,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 17:09:06,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 17:09:06,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:06,354 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 [2022-03-15 17:09:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:06,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:06,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:06,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:07,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513818730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:07,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:07,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:09:07,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291090459] [2022-03-15 17:09:07,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:07,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:09:07,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:09:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:09:07,107 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:08,474 INFO L93 Difference]: Finished difference Result 848 states and 1662 transitions. [2022-03-15 17:09:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:09:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:08,475 INFO L225 Difference]: With dead ends: 848 [2022-03-15 17:09:08,475 INFO L226 Difference]: Without dead ends: 803 [2022-03-15 17:09:08,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=3527, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 17:09:08,475 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:08,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 469 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:09:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-15 17:09:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 412. [2022-03-15 17:09:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0097323600973236) internal successors, (826), 411 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 826 transitions. [2022-03-15 17:09:08,481 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 826 transitions. Word has length 30 [2022-03-15 17:09:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 826 transitions. [2022-03-15 17:09:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 826 transitions. [2022-03-15 17:09:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:08,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:08,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:08,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:08,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:08,682 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1385085921, now seen corresponding path program 193 times [2022-03-15 17:09:08,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:08,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213639360] [2022-03-15 17:09:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:08,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:08,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:08,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213639360] [2022-03-15 17:09:08,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213639360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:08,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710970998] [2022-03-15 17:09:08,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:09:08,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:08,993 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:08,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 17:09:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:09,251 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 [2022-03-15 17:09:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:09,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:09,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:09,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:10,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710970998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:10,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:10,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-03-15 17:09:10,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584666582] [2022-03-15 17:09:10,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:10,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 17:09:10,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 17:09:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 17:09:10,070 INFO L87 Difference]: Start difference. First operand 412 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:11,603 INFO L93 Difference]: Finished difference Result 852 states and 1666 transitions. [2022-03-15 17:09:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:09:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:11,604 INFO L225 Difference]: With dead ends: 852 [2022-03-15 17:09:11,604 INFO L226 Difference]: Without dead ends: 819 [2022-03-15 17:09:11,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=402, Invalid=4020, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:09:11,605 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:11,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 527 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:09:11,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-03-15 17:09:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 409. [2022-03-15 17:09:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-03-15 17:09:11,610 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-03-15 17:09:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:11,610 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-03-15 17:09:11,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-03-15 17:09:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:11,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:11,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:11,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:11,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-15 17:09:11,811 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 570372635, now seen corresponding path program 194 times [2022-03-15 17:09:11,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:11,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494067110] [2022-03-15 17:09:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:12,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494067110] [2022-03-15 17:09:12,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494067110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604389410] [2022-03-15 17:09:12,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:09:12,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:12,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:12,139 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 17:09:12,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:09:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:12,397 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 15 treesize of output 7 [2022-03-15 17:09:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:13,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:13,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:13,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604389410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:13,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:13,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-03-15 17:09:13,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765696537] [2022-03-15 17:09:13,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:13,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:09:13,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:09:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:09:13,288 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:15,140 INFO L93 Difference]: Finished difference Result 850 states and 1662 transitions. [2022-03-15 17:09:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 17:09:15,140 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:15,141 INFO L225 Difference]: With dead ends: 850 [2022-03-15 17:09:15,141 INFO L226 Difference]: Without dead ends: 814 [2022-03-15 17:09:15,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=427, Invalid=4543, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:09:15,142 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:15,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 738 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:09:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-15 17:09:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 406. [2022-03-15 17:09:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-03-15 17:09:15,147 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-03-15 17:09:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-03-15 17:09:15,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-03-15 17:09:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:15,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:15,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:15,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-15 17:09:15,348 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash 86969375, now seen corresponding path program 195 times [2022-03-15 17:09:15,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:15,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125377805] [2022-03-15 17:09:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:15,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:15,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:15,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125377805] [2022-03-15 17:09:15,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125377805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:15,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601588566] [2022-03-15 17:09:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:09:15,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:15,678 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:15,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 17:09:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 17:09:15,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:15,973 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 [2022-03-15 17:09:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:16,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:16,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:16,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:09:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:16,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601588566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:16,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:16,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 17:09:16,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082980351] [2022-03-15 17:09:16,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:16,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 17:09:16,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 17:09:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2234, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 17:09:16,977 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:18,913 INFO L93 Difference]: Finished difference Result 828 states and 1620 transitions. [2022-03-15 17:09:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 17:09:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:18,914 INFO L225 Difference]: With dead ends: 828 [2022-03-15 17:09:18,914 INFO L226 Difference]: Without dead ends: 821 [2022-03-15 17:09:18,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=452, Invalid=5098, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 17:09:18,915 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:18,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 823 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2810 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 17:09:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-03-15 17:09:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 391. [2022-03-15 17:09:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0076923076923077) internal successors, (783), 390 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 783 transitions. [2022-03-15 17:09:18,921 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 783 transitions. Word has length 30 [2022-03-15 17:09:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:18,921 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 783 transitions. [2022-03-15 17:09:18,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 783 transitions. [2022-03-15 17:09:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:18,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:18,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:18,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-15 17:09:19,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:19,123 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash -925882297, now seen corresponding path program 196 times [2022-03-15 17:09:19,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:19,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026662690] [2022-03-15 17:09:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:19,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:19,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026662690] [2022-03-15 17:09:19,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026662690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:19,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283865167] [2022-03-15 17:09:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:09:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:19,414 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 17:09:19,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:09:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:19,506 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 15 treesize of output 7 [2022-03-15 17:09:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:19,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:20,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:20,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:20,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283865167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:20,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:20,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:09:20,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479303083] [2022-03-15 17:09:20,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:20,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:09:20,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:09:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:09:20,302 INFO L87 Difference]: Start difference. First operand 391 states and 783 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:21,886 INFO L93 Difference]: Finished difference Result 800 states and 1577 transitions. [2022-03-15 17:09:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 17:09:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:21,887 INFO L225 Difference]: With dead ends: 800 [2022-03-15 17:09:21,887 INFO L226 Difference]: Without dead ends: 791 [2022-03-15 17:09:21,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=428, Invalid=3354, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 17:09:21,888 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:21,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 466 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:09:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-15 17:09:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 421. [2022-03-15 17:09:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.9976190476190476) internal successors, (839), 420 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 839 transitions. [2022-03-15 17:09:21,893 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 839 transitions. Word has length 30 [2022-03-15 17:09:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:21,893 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 839 transitions. [2022-03-15 17:09:21,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 839 transitions. [2022-03-15 17:09:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:21,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:21,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:21,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:22,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-15 17:09:22,094 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash -43816573, now seen corresponding path program 197 times [2022-03-15 17:09:22,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:22,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344538773] [2022-03-15 17:09:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:22,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:22,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344538773] [2022-03-15 17:09:22,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344538773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:22,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69813342] [2022-03-15 17:09:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:09:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:22,394 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:22,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 17:09:22,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:09:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:09:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:22,485 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 [2022-03-15 17:09:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:22,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:23,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:23,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:23,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69813342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:23,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:23,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:09:23,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877055595] [2022-03-15 17:09:23,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:23,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:09:23,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:09:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:09:23,312 INFO L87 Difference]: Start difference. First operand 421 states and 839 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:24,809 INFO L93 Difference]: Finished difference Result 685 states and 1361 transitions. [2022-03-15 17:09:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 17:09:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:24,810 INFO L225 Difference]: With dead ends: 685 [2022-03-15 17:09:24,810 INFO L226 Difference]: Without dead ends: 670 [2022-03-15 17:09:24,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 17:09:24,810 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:24,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 344 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:09:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-03-15 17:09:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 419. [2022-03-15 17:09:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.9976076555023923) internal successors, (835), 418 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 835 transitions. [2022-03-15 17:09:24,815 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 835 transitions. Word has length 30 [2022-03-15 17:09:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:24,815 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 835 transitions. [2022-03-15 17:09:24,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 835 transitions. [2022-03-15 17:09:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:24,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:24,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:24,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-15 17:09:25,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:25,016 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1424850145, now seen corresponding path program 198 times [2022-03-15 17:09:25,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:25,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986199493] [2022-03-15 17:09:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:25,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:25,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986199493] [2022-03-15 17:09:25,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986199493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:25,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397079109] [2022-03-15 17:09:25,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:09:25,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:25,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:25,307 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:25,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 17:09:25,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:09:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:09:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:25,401 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 [2022-03-15 17:09:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:25,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:26,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:26,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:26,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397079109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:26,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:26,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-03-15 17:09:26,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906462314] [2022-03-15 17:09:26,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:26,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:09:26,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:09:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:09:26,174 INFO L87 Difference]: Start difference. First operand 419 states and 835 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-03-15 17:09:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:27,601 INFO L93 Difference]: Finished difference Result 805 states and 1580 transitions. [2022-03-15 17:09:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 17:09:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:27,602 INFO L225 Difference]: With dead ends: 805 [2022-03-15 17:09:27,602 INFO L226 Difference]: Without dead ends: 768 [2022-03-15 17:09:27,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 17:09:27,603 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:27,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 379 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:09:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-15 17:09:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 417. [2022-03-15 17:09:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9975961538461537) internal successors, (831), 416 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 831 transitions. [2022-03-15 17:09:27,608 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 831 transitions. Word has length 30 [2022-03-15 17:09:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:27,608 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 831 transitions. [2022-03-15 17:09:27,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-03-15 17:09:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 831 transitions. [2022-03-15 17:09:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:27,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:27,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:27,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-15 17:09:27,809 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1948415011, now seen corresponding path program 199 times [2022-03-15 17:09:27,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:27,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45325824] [2022-03-15 17:09:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:28,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:28,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45325824] [2022-03-15 17:09:28,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45325824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:28,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37399999] [2022-03-15 17:09:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:09:28,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:28,099 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:28,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 17:09:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:28,190 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 15 treesize of output 7 [2022-03-15 17:09:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:28,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:28,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:28,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:29,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37399999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:29,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:29,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-03-15 17:09:29,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056994073] [2022-03-15 17:09:29,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:09:29,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:09:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:09:29,009 INFO L87 Difference]: Start difference. First operand 417 states and 831 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:30,384 INFO L93 Difference]: Finished difference Result 790 states and 1558 transitions. [2022-03-15 17:09:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 17:09:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:09:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:30,385 INFO L225 Difference]: With dead ends: 790 [2022-03-15 17:09:30,385 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 17:09:30,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3249, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 17:09:30,386 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 159 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:30,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:09:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 17:09:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 402. [2022-03-15 17:09:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2022-03-15 17:09:30,391 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2022-03-15 17:09:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:30,391 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2022-03-15 17:09:30,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 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) [2022-03-15 17:09:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2022-03-15 17:09:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:30,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:30,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:30,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-15 17:09:30,592 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1532131869, now seen corresponding path program 200 times [2022-03-15 17:09:30,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:30,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062669593] [2022-03-15 17:09:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:30,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:30,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062669593] [2022-03-15 17:09:30,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062669593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:30,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264445512] [2022-03-15 17:09:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:09:30,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:30,876 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:30,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 17:09:30,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:09:30,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:30,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:30,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:30,967 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 [2022-03-15 17:09:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:31,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:31,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:31,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-15 17:09:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:31,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264445512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:31,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:31,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-03-15 17:09:31,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198287099] [2022-03-15 17:09:31,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 17:09:31,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 17:09:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 17:09:31,752 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) 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) [2022-03-15 17:09:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:33,129 INFO L93 Difference]: Finished difference Result 818 states and 1607 transitions. [2022-03-15 17:09:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 17:09:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) 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) Word has length 30 [2022-03-15 17:09:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:33,130 INFO L225 Difference]: With dead ends: 818 [2022-03-15 17:09:33,130 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 17:09:33,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 17:09:33,131 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:33,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 311 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:09:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 17:09:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 419. [2022-03-15 17:09:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2022-03-15 17:09:33,136 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2022-03-15 17:09:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:33,136 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2022-03-15 17:09:33,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) 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) [2022-03-15 17:09:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2022-03-15 17:09:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:09:33,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:33,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:33,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:33,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 17:09:33,337 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1880769703, now seen corresponding path program 201 times [2022-03-15 17:09:33,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:33,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125072337] [2022-03-15 17:09:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:33,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:33,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125072337] [2022-03-15 17:09:33,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125072337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:33,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532430436] [2022-03-15 17:09:33,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:09:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:33,651 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:33,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 17:09:33,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:09:33,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:33,748 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 [2022-03-15 17:09:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:34,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:34,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 17:09:34,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-03-15 17:09:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:34,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532430436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:34,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:34,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-03-15 17:09:34,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991680618] [2022-03-15 17:09:34,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:34,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:09:34,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:09:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:09:34,644 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 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) Received shutdown request... [2022-03-15 17:09:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 17:09:35,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:09:35,146 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:35,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:09:35,147 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 17:09:35,154 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:09:35,163 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 [2022-03-15 17:09:35,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:35,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 17:09:35,349 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (419states) and FLOYD_HOARE automaton (currently 17 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (49 states constructed, input type IntersectNwa). [2022-03-15 17:09:35,350 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 17:09:35,350 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 17:09:35,352 INFO L732 BasicCegarLoop]: Path program histogram: [201, 12, 1] [2022-03-15 17:09:35,354 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 17:09:35,354 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 17:09:35,356 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 05:09:35 BasicIcfg [2022-03-15 17:09:35,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 17:09:35,356 INFO L158 Benchmark]: Toolchain (without parser) took 717951.12ms. Allocated memory was 179.3MB in the beginning and 268.4MB in the end (delta: 89.1MB). Free memory was 137.4MB in the beginning and 227.8MB in the end (delta: -90.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:09:35,356 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 179.3MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:09:35,356 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.66ms. Allocated memory is still 179.3MB. Free memory was 137.4MB in the beginning and 135.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 17:09:35,357 INFO L158 Benchmark]: Boogie Preprocessor took 21.38ms. Allocated memory is still 179.3MB. Free memory was 135.8MB in the beginning and 134.9MB in the end (delta: 932.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:09:35,357 INFO L158 Benchmark]: RCFGBuilder took 227.46ms. Allocated memory is still 179.3MB. Free memory was 134.8MB in the beginning and 125.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-15 17:09:35,357 INFO L158 Benchmark]: TraceAbstraction took 717668.48ms. Allocated memory was 179.3MB in the beginning and 268.4MB in the end (delta: 89.1MB). Free memory was 124.8MB in the beginning and 227.8MB in the end (delta: -103.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:09:35,357 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 0.14ms. Allocated memory is still 179.3MB. Free memory is still 138.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.66ms. Allocated memory is still 179.3MB. Free memory was 137.4MB in the beginning and 135.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.38ms. Allocated memory is still 179.3MB. Free memory was 135.8MB in the beginning and 134.9MB in the end (delta: 932.8kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 227.46ms. Allocated memory is still 179.3MB. Free memory was 134.8MB in the beginning and 125.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 717668.48ms. Allocated memory was 179.3MB in the beginning and 268.4MB in the end (delta: 89.1MB). Free memory was 124.8MB in the beginning and 227.8MB in the end (delta: -103.0MB). There was no memory consumed. 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (419states) and FLOYD_HOARE automaton (currently 17 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (49 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (419states) and FLOYD_HOARE automaton (currently 17 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (49 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (419states) and FLOYD_HOARE automaton (currently 17 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (49 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 717.5s, OverallIterations: 214, TraceHistogramMax: 2, PathProgramHistogramMax: 201, EmptinessCheckTime: 0.1s, AutomataDifference: 377.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38858 SdHoareTripleChecker+Valid, 147.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38858 mSDsluCounter, 91426 SdHoareTripleChecker+Invalid, 124.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5426 IncrementalHoareTripleChecker+Unchecked, 158603 mSDsCounter, 18480 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 375537 IncrementalHoareTripleChecker+Invalid, 399443 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18480 mSolverCounterUnsat, 6670 mSDtfsCounter, 375537 mSolverCounterSat, 1.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21746 GetRequests, 6148 SyntacticMatches, 1473 SemanticMatches, 14125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291914 ImplicationChecksByTransitivity, 378.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=128, InterpolantAutomatonStates: 8540, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 213 MinimizatonAttempts, 74372 StatesRemovedByMinimization, 211 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 288.5s InterpolantComputationTime, 12533 NumberOfCodeBlocks, 12533 NumberOfCodeBlocksAsserted, 614 NumberOfCheckSat, 18132 ConstructedInterpolants, 119 QuantifiedInterpolants, 330996 SizeOfPredicates, 2858 NumberOfNonLiveVariables, 14348 ConjunctsInSsa, 6490 ConjunctsInUnsatCore, 636 InterpolantComputations, 3 PerfectInterpolantSequences, 8/4844 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