/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:32:01,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:32:01,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:32:01,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:32:01,953 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:32:01,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:32:01,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:32:01,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:32:01,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:32:01,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:32:01,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:32:01,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:32:01,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:32:01,980 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:32:01,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:32:01,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:32:01,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:32:01,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:32:01,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:32:01,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:32:02,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:32:02,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:32:02,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:32:02,186 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:32:02,189 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:32:02,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2022-02-10 03:32:02,190 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2022-02-10 03:32:02,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:32:02,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:32:02,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:32:02,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:32:02,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:32:02,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,239 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:32:02,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:32:02,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:32:02,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:32:02,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:32:02,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:32:02,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:32:02,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:32:02,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:32:02,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/1) ... [2022-02-10 03:32:02,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:32:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:02,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 03:32:02,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 03:32:02,324 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:32:02,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:32:02,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:32:02,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:32:02,325 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:32:02,325 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:32:02,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:32:02,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:32:02,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:32:02,326 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:32:02,368 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:32:02,370 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:32:02,445 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:32:02,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:32:02,457 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:32:02,458 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:32:02 BoogieIcfgContainer [2022-02-10 03:32:02,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:32:02,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:32:02,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:32:02,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:32:02,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:32:02" (1/2) ... [2022-02-10 03:32:02,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a6d743 and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:32:02, skipping insertion in model container [2022-02-10 03:32:02,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:32:02" (2/2) ... [2022-02-10 03:32:02,463 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2022-02-10 03:32:02,466 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:32:02,466 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:32:02,467 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:32:02,467 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:32:02,487 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-10 03:32:02,528 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:32:02,532 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 [2022-02-10 03:32:02,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-10 03:32:02,539 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-02-10 03:32:02,559 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:03,533 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 39432 transitions and produced 21598 states. [2022-02-10 03:32:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 21598 states, 16256 states have (on average 1.6128198818897639) internal successors, (26218), 21597 states have internal predecessors, (26218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 03:32:03,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:03,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:03,652 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 163765355, now seen corresponding path program 1 times [2022-02-10 03:32:03,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:03,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564152538] [2022-02-10 03:32:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:03,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:03,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:03,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564152538] [2022-02-10 03:32:03,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564152538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:32:03,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:32:03,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-10 03:32:03,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565474583] [2022-02-10 03:32:03,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:32:03,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:32:03,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:32:03,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:32:03,973 INFO L87 Difference]: Start difference. First operand has 21598 states, 16256 states have (on average 1.6128198818897639) internal successors, (26218), 21597 states have internal predecessors, (26218), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:04,442 INFO L93 Difference]: Finished difference Result 21594 states and 26214 transitions. [2022-02-10 03:32:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:32:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-10 03:32:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:04,559 INFO L225 Difference]: With dead ends: 21594 [2022-02-10 03:32:04,560 INFO L226 Difference]: Without dead ends: 13033 [2022-02-10 03:32:04,561 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 [2022-02-10 03:32:04,564 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:04,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:32:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13033 states. [2022-02-10 03:32:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13033 to 51. [2022-02-10 03:32:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2022-02-10 03:32:04,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 11 [2022-02-10 03:32:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:04,700 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2022-02-10 03:32:04,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2022-02-10 03:32:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:32:04,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:04,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:04,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:32:04,701 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2005369362, now seen corresponding path program 1 times [2022-02-10 03:32:04,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:04,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828677740] [2022-02-10 03:32:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:04,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:04,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828677740] [2022-02-10 03:32:04,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828677740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:32:04,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:32:04,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-10 03:32:04,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447462253] [2022-02-10 03:32:04,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:32:04,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:32:04,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:32:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:32:04,737 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:04,797 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2022-02-10 03:32:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:32:04,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-10 03:32:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:04,798 INFO L225 Difference]: With dead ends: 61 [2022-02-10 03:32:04,798 INFO L226 Difference]: Without dead ends: 53 [2022-02-10 03:32:04,799 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 [2022-02-10 03:32:04,802 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:04,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:32:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-10 03:32:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-10 03:32:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-02-10 03:32:04,808 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 15 [2022-02-10 03:32:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:04,808 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-02-10 03:32:04,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-02-10 03:32:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 03:32:04,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:04,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:04,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:32:04,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1763156360, now seen corresponding path program 1 times [2022-02-10 03:32:04,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:04,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53118644] [2022-02-10 03:32:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:04,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:04,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:04,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53118644] [2022-02-10 03:32:04,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53118644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:32:04,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:32:04,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-10 03:32:04,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375976866] [2022-02-10 03:32:04,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:32:04,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:32:04,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:32:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:32:04,859 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:04,875 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-10 03:32:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:32:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-10 03:32:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:04,876 INFO L225 Difference]: With dead ends: 52 [2022-02-10 03:32:04,876 INFO L226 Difference]: Without dead ends: 49 [2022-02-10 03:32:04,876 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 [2022-02-10 03:32:04,877 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:04,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:32:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-10 03:32:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-02-10 03:32:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 45 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-02-10 03:32:04,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 15 [2022-02-10 03:32:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:04,879 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-02-10 03:32:04,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-02-10 03:32:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:32:04,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:04,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:04,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:32:04,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 289902701, now seen corresponding path program 1 times [2022-02-10 03:32:04,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:04,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075839497] [2022-02-10 03:32:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:04,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:05,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:05,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075839497] [2022-02-10 03:32:05,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075839497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:05,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506138945] [2022-02-10 03:32:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:05,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:05,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:05,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:32:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:05,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:32:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:05,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:05,415 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 18 treesize of output 12 [2022-02-10 03:32:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:05,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:05,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:05,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-02-10 03:32:05,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:05,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 35 [2022-02-10 03:32:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:05,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506138945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:05,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:05,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-10 03:32:05,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341610874] [2022-02-10 03:32:05,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:05,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:32:05,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:32:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:32:05,951 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:06,519 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2022-02-10 03:32:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:32:06,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:32:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:06,520 INFO L225 Difference]: With dead ends: 101 [2022-02-10 03:32:06,520 INFO L226 Difference]: Without dead ends: 96 [2022-02-10 03:32:06,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:32:06,521 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:06,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 103 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-10 03:32:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2022-02-10 03:32:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-02-10 03:32:06,524 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 19 [2022-02-10 03:32:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:06,524 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-02-10 03:32:06,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-02-10 03:32:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-10 03:32:06,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:06,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:06,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:06,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:06,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -146897782, now seen corresponding path program 2 times [2022-02-10 03:32:06,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:06,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834282477] [2022-02-10 03:32:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:06,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:06,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:06,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834282477] [2022-02-10 03:32:06,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834282477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:06,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305918638] [2022-02-10 03:32:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:32:06,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:06,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:06,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:32:06,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:32:06,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 03:32:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:06,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 03:32:06,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305918638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:32:06,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 03:32:06,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-10 03:32:06,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657680115] [2022-02-10 03:32:06,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:32:06,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:32:06,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:32:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:32:06,879 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-02-10 03:32:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:06,893 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2022-02-10 03:32:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:32:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23 [2022-02-10 03:32:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:06,895 INFO L225 Difference]: With dead ends: 136 [2022-02-10 03:32:06,895 INFO L226 Difference]: Without dead ends: 133 [2022-02-10 03:32:06,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:32:06,896 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:06,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:32:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-10 03:32:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2022-02-10 03:32:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 99 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 142 transitions. [2022-02-10 03:32:06,900 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 142 transitions. Word has length 23 [2022-02-10 03:32:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:06,900 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 142 transitions. [2022-02-10 03:32:06,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-02-10 03:32:06,900 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 142 transitions. [2022-02-10 03:32:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-10 03:32:06,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:06,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:06,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:07,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:07,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1353837620, now seen corresponding path program 3 times [2022-02-10 03:32:07,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:07,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086668959] [2022-02-10 03:32:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:07,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:07,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:07,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086668959] [2022-02-10 03:32:07,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086668959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:07,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112951694] [2022-02-10 03:32:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:32:07,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:07,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:07,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:32:07,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:32:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 03:32:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:07,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:07,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112951694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:07,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:07,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-02-10 03:32:07,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787288687] [2022-02-10 03:32:07,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:07,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:32:07,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:32:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:32:07,283 INFO L87 Difference]: Start difference. First operand 100 states and 142 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:07,300 INFO L93 Difference]: Finished difference Result 176 states and 238 transitions. [2022-02-10 03:32:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:32:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-10 03:32:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:07,302 INFO L225 Difference]: With dead ends: 176 [2022-02-10 03:32:07,302 INFO L226 Difference]: Without dead ends: 159 [2022-02-10 03:32:07,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:32:07,303 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:07,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:32:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-10 03:32:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2022-02-10 03:32:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4191176470588236) internal successors, (193), 136 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 193 transitions. [2022-02-10 03:32:07,322 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 193 transitions. Word has length 23 [2022-02-10 03:32:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:07,322 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 193 transitions. [2022-02-10 03:32:07,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 193 transitions. [2022-02-10 03:32:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:07,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:07,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:07,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:07,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:07,539 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:07,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1688133009, now seen corresponding path program 4 times [2022-02-10 03:32:07,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:07,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788751302] [2022-02-10 03:32:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:07,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:32:07,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:07,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788751302] [2022-02-10 03:32:07,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788751302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:07,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300370520] [2022-02-10 03:32:07,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:32:07,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:07,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:07,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:32:07,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:32:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:32:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:08,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:08,143 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 13 treesize of output 9 [2022-02-10 03:32:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:08,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:08,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:08,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:08,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-10 03:32:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:08,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300370520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:08,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:08,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-02-10 03:32:08,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764828796] [2022-02-10 03:32:08,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:08,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:32:08,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:32:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:32:08,763 INFO L87 Difference]: Start difference. First operand 137 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:09,658 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2022-02-10 03:32:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:32:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:32:09,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:09,660 INFO L225 Difference]: With dead ends: 198 [2022-02-10 03:32:09,660 INFO L226 Difference]: Without dead ends: 187 [2022-02-10 03:32:09,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=516, Invalid=2564, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:32:09,661 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:09,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-10 03:32:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 137. [2022-02-10 03:32:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.411764705882353) internal successors, (192), 136 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 192 transitions. [2022-02-10 03:32:09,665 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 192 transitions. Word has length 27 [2022-02-10 03:32:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:09,665 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 192 transitions. [2022-02-10 03:32:09,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 192 transitions. [2022-02-10 03:32:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:09,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:09,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:09,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:09,876 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1856080249, now seen corresponding path program 5 times [2022-02-10 03:32:09,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:09,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890799965] [2022-02-10 03:32:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:09,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:10,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:10,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890799965] [2022-02-10 03:32:10,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890799965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:10,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745944786] [2022-02-10 03:32:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:32:10,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:10,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:10,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:32:10,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:32:10,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:10,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:32:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:10,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:10,579 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 13 treesize of output 9 [2022-02-10 03:32:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:10,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:10,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:10,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:11,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:11,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:32:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:11,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745944786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:11,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:11,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-02-10 03:32:11,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353264672] [2022-02-10 03:32:11,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:11,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-10 03:32:11,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-10 03:32:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:32:11,302 INFO L87 Difference]: Start difference. First operand 137 states and 192 transitions. Second operand has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 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) [2022-02-10 03:32:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:12,711 INFO L93 Difference]: Finished difference Result 230 states and 311 transitions. [2022-02-10 03:32:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-10 03:32:12,712 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 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 27 [2022-02-10 03:32:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:12,713 INFO L225 Difference]: With dead ends: 230 [2022-02-10 03:32:12,713 INFO L226 Difference]: Without dead ends: 222 [2022-02-10 03:32:12,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=842, Invalid=5010, Unknown=0, NotChecked=0, Total=5852 [2022-02-10 03:32:12,715 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:12,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 118 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-10 03:32:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 141. [2022-02-10 03:32:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4142857142857144) internal successors, (198), 140 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 198 transitions. [2022-02-10 03:32:12,719 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 198 transitions. Word has length 27 [2022-02-10 03:32:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:12,720 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 198 transitions. [2022-02-10 03:32:12,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 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) [2022-02-10 03:32:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 198 transitions. [2022-02-10 03:32:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:12,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:12,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:12,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-10 03:32:12,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:12,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash 31567347, now seen corresponding path program 6 times [2022-02-10 03:32:12,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:12,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008753801] [2022-02-10 03:32:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:12,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:13,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:13,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008753801] [2022-02-10 03:32:13,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008753801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:13,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167770633] [2022-02-10 03:32:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:32:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:13,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:13,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:32:13,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:32:13,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:32:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:13,524 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 13 treesize of output 9 [2022-02-10 03:32:13,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:13,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:13,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:13,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:14,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:14,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-10 03:32:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:14,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167770633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:14,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:14,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-02-10 03:32:14,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291616455] [2022-02-10 03:32:14,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:14,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-10 03:32:14,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-10 03:32:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:32:14,127 INFO L87 Difference]: Start difference. First operand 141 states and 198 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:15,177 INFO L93 Difference]: Finished difference Result 225 states and 301 transitions. [2022-02-10 03:32:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:32:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:32:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:15,178 INFO L225 Difference]: With dead ends: 225 [2022-02-10 03:32:15,178 INFO L226 Difference]: Without dead ends: 219 [2022-02-10 03:32:15,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=676, Invalid=3484, Unknown=0, NotChecked=0, Total=4160 [2022-02-10 03:32:15,179 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 167 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:15,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 122 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-10 03:32:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 150. [2022-02-10 03:32:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.4093959731543624) internal successors, (210), 149 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 210 transitions. [2022-02-10 03:32:15,182 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 210 transitions. Word has length 27 [2022-02-10 03:32:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 210 transitions. [2022-02-10 03:32:15,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 210 transitions. [2022-02-10 03:32:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:15,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:15,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:15,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:15,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 413037943, now seen corresponding path program 7 times [2022-02-10 03:32:15,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:15,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643593811] [2022-02-10 03:32:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:15,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:15,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:15,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643593811] [2022-02-10 03:32:15,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643593811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:15,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545755625] [2022-02-10 03:32:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:32:15,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:15,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:15,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:32:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:32:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:15,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:15,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:15,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:16,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:16,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:16,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:16,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:32:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:16,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545755625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:16,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:16,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 36 [2022-02-10 03:32:16,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216296482] [2022-02-10 03:32:16,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-10 03:32:16,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-10 03:32:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:32:16,494 INFO L87 Difference]: Start difference. First operand 150 states and 210 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:17,825 INFO L93 Difference]: Finished difference Result 240 states and 326 transitions. [2022-02-10 03:32:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:32:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:32:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:17,826 INFO L225 Difference]: With dead ends: 240 [2022-02-10 03:32:17,826 INFO L226 Difference]: Without dead ends: 228 [2022-02-10 03:32:17,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=681, Invalid=4575, Unknown=0, NotChecked=0, Total=5256 [2022-02-10 03:32:17,828 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:17,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 124 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:32:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-10 03:32:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2022-02-10 03:32:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4) internal successors, (196), 140 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 196 transitions. [2022-02-10 03:32:17,836 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 196 transitions. Word has length 27 [2022-02-10 03:32:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:17,837 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 196 transitions. [2022-02-10 03:32:17,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 196 transitions. [2022-02-10 03:32:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:17,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:17,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:17,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:18,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2050813427, now seen corresponding path program 8 times [2022-02-10 03:32:18,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:18,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57254894] [2022-02-10 03:32:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:18,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:18,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:18,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57254894] [2022-02-10 03:32:18,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57254894] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:18,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565829264] [2022-02-10 03:32:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:32:18,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:18,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:32:18,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:32:18,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:32:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:18,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:18,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:18,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:18,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:18,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:18,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:18,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:32:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:19,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565829264] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:19,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:19,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-10 03:32:19,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534760891] [2022-02-10 03:32:19,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:19,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:32:19,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:32:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:32:19,072 INFO L87 Difference]: Start difference. First operand 141 states and 196 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:19,889 INFO L93 Difference]: Finished difference Result 212 states and 284 transitions. [2022-02-10 03:32:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:32:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:32:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:19,891 INFO L225 Difference]: With dead ends: 212 [2022-02-10 03:32:19,891 INFO L226 Difference]: Without dead ends: 207 [2022-02-10 03:32:19,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=2312, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:32:19,892 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:19,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 99 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-10 03:32:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2022-02-10 03:32:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.392156862745098) internal successors, (213), 153 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 213 transitions. [2022-02-10 03:32:19,895 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 213 transitions. Word has length 27 [2022-02-10 03:32:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:19,895 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 213 transitions. [2022-02-10 03:32:19,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 213 transitions. [2022-02-10 03:32:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:32:19,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:19,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:19,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-10 03:32:20,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-10 03:32:20,107 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1862683273, now seen corresponding path program 9 times [2022-02-10 03:32:20,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:20,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192387559] [2022-02-10 03:32:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:20,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:20,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:20,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192387559] [2022-02-10 03:32:20,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192387559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:20,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761394680] [2022-02-10 03:32:20,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:32:20,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:20,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:20,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:32:20,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:32:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:32:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:20,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:20,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:20,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:20,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:20,910 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 36 treesize of output 38 [2022-02-10 03:32:21,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:21,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:32:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:21,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761394680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:21,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:21,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-02-10 03:32:21,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844364897] [2022-02-10 03:32:21,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:21,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:32:21,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:32:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:32:21,179 INFO L87 Difference]: Start difference. First operand 154 states and 213 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:21,918 INFO L93 Difference]: Finished difference Result 219 states and 300 transitions. [2022-02-10 03:32:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:32:21,918 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:32:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:21,919 INFO L225 Difference]: With dead ends: 219 [2022-02-10 03:32:21,919 INFO L226 Difference]: Without dead ends: 211 [2022-02-10 03:32:21,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:32:21,921 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:21,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 93 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-10 03:32:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 154. [2022-02-10 03:32:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.3856209150326797) internal successors, (212), 153 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 212 transitions. [2022-02-10 03:32:21,924 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 212 transitions. Word has length 27 [2022-02-10 03:32:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:21,924 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 212 transitions. [2022-02-10 03:32:21,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 212 transitions. [2022-02-10 03:32:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-10 03:32:21,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:21,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:21,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:22,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:22,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -901559434, now seen corresponding path program 10 times [2022-02-10 03:32:22,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:22,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510984162] [2022-02-10 03:32:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:22,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:22,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:22,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510984162] [2022-02-10 03:32:22,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510984162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:22,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558244842] [2022-02-10 03:32:22,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:32:22,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:22,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:22,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:32:22,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:32:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:32:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:22,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:22,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558244842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:22,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:22,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-10 03:32:22,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738615740] [2022-02-10 03:32:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:22,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:32:22,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:32:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:32:22,291 INFO L87 Difference]: Start difference. First operand 154 states and 212 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:22,305 INFO L93 Difference]: Finished difference Result 247 states and 325 transitions. [2022-02-10 03:32:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:32:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-10 03:32:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:22,306 INFO L225 Difference]: With dead ends: 247 [2022-02-10 03:32:22,306 INFO L226 Difference]: Without dead ends: 231 [2022-02-10 03:32:22,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:32:22,307 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:22,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:32:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-10 03:32:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2022-02-10 03:32:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-02-10 03:32:22,310 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 31 [2022-02-10 03:32:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:22,310 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-02-10 03:32:22,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-02-10 03:32:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-10 03:32:22,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:22,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:22,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:22,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-10 03:32:22,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash 60665616, now seen corresponding path program 11 times [2022-02-10 03:32:22,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:22,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148915227] [2022-02-10 03:32:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:22,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:22,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:22,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148915227] [2022-02-10 03:32:22,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148915227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:22,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520729210] [2022-02-10 03:32:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:32:22,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:22,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:22,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:22,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:32:22,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:32:22,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:22,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:32:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:22,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:22,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520729210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:22,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:22,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-10 03:32:22,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923495009] [2022-02-10 03:32:22,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:22,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:32:22,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:32:22,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:32:22,733 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:22,749 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-02-10 03:32:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:32:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-10 03:32:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:22,749 INFO L225 Difference]: With dead ends: 89 [2022-02-10 03:32:22,749 INFO L226 Difference]: Without dead ends: 86 [2022-02-10 03:32:22,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:32:22,750 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:22,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:32:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-10 03:32:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-02-10 03:32:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-02-10 03:32:22,752 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 31 [2022-02-10 03:32:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:22,752 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-02-10 03:32:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-02-10 03:32:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:22,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:22,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:22,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:22,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-10 03:32:22,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1369417227, now seen corresponding path program 12 times [2022-02-10 03:32:22,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:22,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134915865] [2022-02-10 03:32:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:22,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:23,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:23,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134915865] [2022-02-10 03:32:23,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134915865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:23,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194684831] [2022-02-10 03:32:23,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:32:23,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:23,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:23,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:23,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:32:23,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:32:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:23,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:23,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:23,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:23,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:23,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:23,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:23,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:24,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194684831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:24,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:24,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-02-10 03:32:24,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618737218] [2022-02-10 03:32:24,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:24,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:32:24,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:32:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:32:24,121 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:24,834 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2022-02-10 03:32:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:32:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:24,835 INFO L225 Difference]: With dead ends: 137 [2022-02-10 03:32:24,835 INFO L226 Difference]: Without dead ends: 131 [2022-02-10 03:32:24,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 25 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:32:24,836 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 104 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:24,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 73 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-10 03:32:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2022-02-10 03:32:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2022-02-10 03:32:24,838 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 35 [2022-02-10 03:32:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:24,838 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2022-02-10 03:32:24,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2022-02-10 03:32:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:24,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:24,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:24,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:25,039 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 [2022-02-10 03:32:25,039 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:25,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash -987946631, now seen corresponding path program 13 times [2022-02-10 03:32:25,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:25,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229881837] [2022-02-10 03:32:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:25,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:25,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:25,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229881837] [2022-02-10 03:32:25,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229881837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:25,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801860383] [2022-02-10 03:32:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:32:25,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:25,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:25,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:32:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:25,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:25,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:25,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:25,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:25,883 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 36 treesize of output 38 [2022-02-10 03:32:25,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:25,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:26,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801860383] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:26,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:26,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-10 03:32:26,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943551552] [2022-02-10 03:32:26,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:26,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:32:26,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:32:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:32:26,190 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:26,816 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2022-02-10 03:32:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:32:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:26,817 INFO L225 Difference]: With dead ends: 135 [2022-02-10 03:32:26,817 INFO L226 Difference]: Without dead ends: 127 [2022-02-10 03:32:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 25 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 03:32:26,818 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:26,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 86 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-10 03:32:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2022-02-10 03:32:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.25) internal successors, (120), 96 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-02-10 03:32:26,820 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 35 [2022-02-10 03:32:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:26,820 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-02-10 03:32:26,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-02-10 03:32:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:26,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:26,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:26,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:27,034 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 [2022-02-10 03:32:27,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1537364467, now seen corresponding path program 14 times [2022-02-10 03:32:27,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:27,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53003344] [2022-02-10 03:32:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:27,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:27,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53003344] [2022-02-10 03:32:27,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53003344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:27,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9820734] [2022-02-10 03:32:27,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:32:27,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:27,317 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:27,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:32:27,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:32:27,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:27,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:27,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:27,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:27,879 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 36 treesize of output 38 [2022-02-10 03:32:27,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:27,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:32:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:28,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9820734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:28,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:28,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-02-10 03:32:28,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575178033] [2022-02-10 03:32:28,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:28,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:32:28,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:32:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:32:28,201 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:28,902 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2022-02-10 03:32:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:32:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:28,903 INFO L225 Difference]: With dead ends: 138 [2022-02-10 03:32:28,903 INFO L226 Difference]: Without dead ends: 130 [2022-02-10 03:32:28,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:32:28,904 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:28,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 110 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-10 03:32:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 83. [2022-02-10 03:32:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-02-10 03:32:28,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 35 [2022-02-10 03:32:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:28,906 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-02-10 03:32:28,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-02-10 03:32:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:28,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:28,907 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:28,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:29,111 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 [2022-02-10 03:32:29,111 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash 350283129, now seen corresponding path program 15 times [2022-02-10 03:32:29,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:29,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810396433] [2022-02-10 03:32:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:29,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:29,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:29,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810396433] [2022-02-10 03:32:29,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810396433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:29,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622630525] [2022-02-10 03:32:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:32:29,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:29,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:29,431 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:29,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:32:29,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:32:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:29,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:32:29,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:29,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:30,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:30,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:30,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:30,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:32:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:30,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622630525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:30,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:30,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-02-10 03:32:30,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974896855] [2022-02-10 03:32:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-10 03:32:30,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-10 03:32:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:32:30,761 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:31,819 INFO L93 Difference]: Finished difference Result 191 states and 232 transitions. [2022-02-10 03:32:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-10 03:32:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:31,820 INFO L225 Difference]: With dead ends: 191 [2022-02-10 03:32:31,820 INFO L226 Difference]: Without dead ends: 185 [2022-02-10 03:32:31,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=854, Invalid=4846, Unknown=0, NotChecked=0, Total=5700 [2022-02-10 03:32:31,822 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:31,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 132 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 412 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-02-10 03:32:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-10 03:32:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 109. [2022-02-10 03:32:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.25) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-02-10 03:32:31,825 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 35 [2022-02-10 03:32:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:31,825 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-02-10 03:32:31,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-02-10 03:32:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:31,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:31,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:31,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-10 03:32:32,035 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 [2022-02-10 03:32:32,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 731753725, now seen corresponding path program 16 times [2022-02-10 03:32:32,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:32,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550626622] [2022-02-10 03:32:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:32,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:32,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:32,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550626622] [2022-02-10 03:32:32,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550626622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:32,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209025135] [2022-02-10 03:32:32,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:32:32,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:32,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:32,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:32:32,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:32:32,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:32,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:32,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:32,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:32,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:32,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:32,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:32,917 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 28 treesize of output 28 [2022-02-10 03:32:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:32:33,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209025135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:33,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:33,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-02-10 03:32:33,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702525170] [2022-02-10 03:32:33,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:33,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:32:33,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:32:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:32:33,028 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:33,431 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2022-02-10 03:32:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:32:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:33,432 INFO L225 Difference]: With dead ends: 135 [2022-02-10 03:32:33,432 INFO L226 Difference]: Without dead ends: 127 [2022-02-10 03:32:33,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:32:33,434 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:33,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 112 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-10 03:32:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2022-02-10 03:32:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 101 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-02-10 03:32:33,437 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 35 [2022-02-10 03:32:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-02-10 03:32:33,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-02-10 03:32:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:33,438 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:33,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:33,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:33,638 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 [2022-02-10 03:32:33,639 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1925438087, now seen corresponding path program 17 times [2022-02-10 03:32:33,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:33,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159700291] [2022-02-10 03:32:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:33,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:33,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:33,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159700291] [2022-02-10 03:32:33,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159700291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:33,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79608561] [2022-02-10 03:32:33,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:32:33,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:33,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:33,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:32:33,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:32:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:33,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:32:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:34,053 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 13 treesize of output 9 [2022-02-10 03:32:34,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:34,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:34,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:34,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:34,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:34,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:32:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:34,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79608561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:34,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:34,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 41 [2022-02-10 03:32:34,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052030758] [2022-02-10 03:32:34,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:34,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-10 03:32:34,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-10 03:32:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-02-10 03:32:34,661 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:36,404 INFO L93 Difference]: Finished difference Result 236 states and 277 transitions. [2022-02-10 03:32:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-10 03:32:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:36,405 INFO L225 Difference]: With dead ends: 236 [2022-02-10 03:32:36,405 INFO L226 Difference]: Without dead ends: 230 [2022-02-10 03:32:36,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1439, Invalid=7873, Unknown=0, NotChecked=0, Total=9312 [2022-02-10 03:32:36,409 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 374 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:36,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 149 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-10 03:32:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 112. [2022-02-10 03:32:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 111 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2022-02-10 03:32:36,412 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 35 [2022-02-10 03:32:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:36,412 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2022-02-10 03:32:36,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2022-02-10 03:32:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:36,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:36,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:36,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:36,631 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 [2022-02-10 03:32:36,631 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1543967491, now seen corresponding path program 18 times [2022-02-10 03:32:36,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:36,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884716066] [2022-02-10 03:32:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:36,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:36,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:36,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884716066] [2022-02-10 03:32:36,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884716066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:36,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277276737] [2022-02-10 03:32:36,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:32:36,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:36,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:36,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:36,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:32:36,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:32:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:37,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:37,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:37,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:37,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:37,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:37,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:37,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:32:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:37,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277276737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:37,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:37,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-10 03:32:37,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951072246] [2022-02-10 03:32:37,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:37,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:32:37,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:32:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:32:37,826 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-10 03:32:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:38,843 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2022-02-10 03:32:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-10 03:32:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 35 [2022-02-10 03:32:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:38,844 INFO L225 Difference]: With dead ends: 180 [2022-02-10 03:32:38,844 INFO L226 Difference]: Without dead ends: 170 [2022-02-10 03:32:38,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 23 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=3285, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:32:38,845 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:38,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 172 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-10 03:32:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2022-02-10 03:32:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 101 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-02-10 03:32:38,848 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 35 [2022-02-10 03:32:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:38,848 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-02-10 03:32:38,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-10 03:32:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-02-10 03:32:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:38,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:38,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:38,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:39,049 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 [2022-02-10 03:32:39,049 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1216636427, now seen corresponding path program 19 times [2022-02-10 03:32:39,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:39,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075144793] [2022-02-10 03:32:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:39,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:39,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:39,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075144793] [2022-02-10 03:32:39,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075144793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:39,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465216690] [2022-02-10 03:32:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:32:39,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:39,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:39,315 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:39,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:32:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:39,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:39,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:39,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:39,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:39,848 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 36 treesize of output 38 [2022-02-10 03:32:39,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:39,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-10 03:32:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:40,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465216690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:40,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:40,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-10 03:32:40,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293491821] [2022-02-10 03:32:40,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:40,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:32:40,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:32:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:32:40,174 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:41,024 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2022-02-10 03:32:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:32:41,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:41,025 INFO L225 Difference]: With dead ends: 188 [2022-02-10 03:32:41,025 INFO L226 Difference]: Without dead ends: 182 [2022-02-10 03:32:41,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:32:41,026 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:41,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 88 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-10 03:32:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-02-10 03:32:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 135 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2022-02-10 03:32:41,028 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 35 [2022-02-10 03:32:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2022-02-10 03:32:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2022-02-10 03:32:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:41,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:41,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:41,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:41,233 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 [2022-02-10 03:32:41,233 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash -835165831, now seen corresponding path program 20 times [2022-02-10 03:32:41,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:41,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896365594] [2022-02-10 03:32:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:41,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:41,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:41,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896365594] [2022-02-10 03:32:41,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896365594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:41,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289914571] [2022-02-10 03:32:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:32:41,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:41,554 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:41,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:32:41,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:32:41,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:41,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:41,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:41,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:42,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:42,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:42,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:42,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:32:42,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289914571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:42,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:42,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-10 03:32:42,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580379414] [2022-02-10 03:32:42,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:42,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:32:42,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:32:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:32:42,453 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2022-02-10 03:32:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:43,185 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2022-02-10 03:32:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 03:32:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 35 [2022-02-10 03:32:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:43,186 INFO L225 Difference]: With dead ends: 187 [2022-02-10 03:32:43,186 INFO L226 Difference]: Without dead ends: 179 [2022-02-10 03:32:43,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:32:43,187 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:43,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 111 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-10 03:32:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 144. [2022-02-10 03:32:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 143 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2022-02-10 03:32:43,189 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 35 [2022-02-10 03:32:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:43,189 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2022-02-10 03:32:43,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2022-02-10 03:32:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2022-02-10 03:32:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:43,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:43,190 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:43,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:43,403 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 [2022-02-10 03:32:43,403 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1384583667, now seen corresponding path program 21 times [2022-02-10 03:32:43,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:43,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269579711] [2022-02-10 03:32:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:43,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:43,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269579711] [2022-02-10 03:32:43,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269579711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838441104] [2022-02-10 03:32:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:32:43,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:43,667 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:43,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:32:43,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:32:43,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:32:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:32:43,912 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:43,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:44,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:44,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:44,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:44,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:44,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:32:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:44,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838441104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:44,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:44,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-10 03:32:44,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253556509] [2022-02-10 03:32:44,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:44,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:32:44,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:32:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:32:44,584 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:45,599 INFO L93 Difference]: Finished difference Result 220 states and 264 transitions. [2022-02-10 03:32:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:32:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:45,600 INFO L225 Difference]: With dead ends: 220 [2022-02-10 03:32:45,600 INFO L226 Difference]: Without dead ends: 212 [2022-02-10 03:32:45,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=748, Invalid=4802, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:32:45,602 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 196 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:45,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 210 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 620 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-02-10 03:32:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-10 03:32:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2022-02-10 03:32:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2272727272727273) internal successors, (162), 132 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2022-02-10 03:32:45,604 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 35 [2022-02-10 03:32:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:45,604 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2022-02-10 03:32:45,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2022-02-10 03:32:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:45,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:45,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:45,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-10 03:32:45,819 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 [2022-02-10 03:32:45,820 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 503063929, now seen corresponding path program 22 times [2022-02-10 03:32:45,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:45,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95446422] [2022-02-10 03:32:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:45,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:46,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:46,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95446422] [2022-02-10 03:32:46,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95446422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:46,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180330626] [2022-02-10 03:32:46,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:32:46,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:46,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:32:46,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:32:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:46,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:46,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:46,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:46,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:46,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:46,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:46,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:32:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:46,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180330626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:46,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:46,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-10 03:32:46,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691220174] [2022-02-10 03:32:46,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:46,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:32:46,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:32:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:32:46,743 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:47,470 INFO L93 Difference]: Finished difference Result 229 states and 272 transitions. [2022-02-10 03:32:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:32:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:47,471 INFO L225 Difference]: With dead ends: 229 [2022-02-10 03:32:47,471 INFO L226 Difference]: Without dead ends: 223 [2022-02-10 03:32:47,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=585, Invalid=3321, Unknown=0, NotChecked=0, Total=3906 [2022-02-10 03:32:47,473 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 145 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-10 03:32:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2022-02-10 03:32:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2374100719424461) internal successors, (172), 139 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2022-02-10 03:32:47,485 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 35 [2022-02-10 03:32:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:47,485 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2022-02-10 03:32:47,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2022-02-10 03:32:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:47,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:47,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:47,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:47,701 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 [2022-02-10 03:32:47,702 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash 884534525, now seen corresponding path program 23 times [2022-02-10 03:32:47,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:47,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775272554] [2022-02-10 03:32:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:47,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:47,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:47,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775272554] [2022-02-10 03:32:47,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775272554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:47,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954798639] [2022-02-10 03:32:47,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:32:47,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:47,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:47,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:32:47,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:32:47,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:32:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:48,183 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 13 treesize of output 9 [2022-02-10 03:32:48,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:48,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:48,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:48,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:48,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:48,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:32:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:32:48,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954798639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:48,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:48,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-10 03:32:48,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955954030] [2022-02-10 03:32:48,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:48,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:32:48,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:32:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:32:48,665 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:49,402 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2022-02-10 03:32:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:32:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:49,403 INFO L225 Difference]: With dead ends: 217 [2022-02-10 03:32:49,403 INFO L226 Difference]: Without dead ends: 209 [2022-02-10 03:32:49,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 03:32:49,404 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:49,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 166 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:32:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-10 03:32:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2022-02-10 03:32:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 136 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2022-02-10 03:32:49,406 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 35 [2022-02-10 03:32:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:49,406 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2022-02-10 03:32:49,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2022-02-10 03:32:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:49,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:49,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:49,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:49,619 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 [2022-02-10 03:32:49,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1772657287, now seen corresponding path program 24 times [2022-02-10 03:32:49,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:49,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131343777] [2022-02-10 03:32:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:49,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:49,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:49,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131343777] [2022-02-10 03:32:49,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131343777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:49,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890147632] [2022-02-10 03:32:49,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:32:49,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:49,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:49,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:49,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:32:49,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:32:49,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:32:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:32:50,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:32:50,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:50,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:50,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:51,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:51,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-10 03:32:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:51,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890147632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:51,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:51,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-02-10 03:32:51,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127558725] [2022-02-10 03:32:51,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:51,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-10 03:32:51,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-10 03:32:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2022-02-10 03:32:51,515 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:53,254 INFO L93 Difference]: Finished difference Result 294 states and 348 transitions. [2022-02-10 03:32:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:32:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:32:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:53,255 INFO L225 Difference]: With dead ends: 294 [2022-02-10 03:32:53,255 INFO L226 Difference]: Without dead ends: 288 [2022-02-10 03:32:53,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1207, Invalid=5933, Unknown=0, NotChecked=0, Total=7140 [2022-02-10 03:32:53,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:53,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 225 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 652 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2022-02-10 03:32:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-10 03:32:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 158. [2022-02-10 03:32:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2229299363057324) internal successors, (192), 157 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 192 transitions. [2022-02-10 03:32:53,259 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 192 transitions. Word has length 35 [2022-02-10 03:32:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 192 transitions. [2022-02-10 03:32:53,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 192 transitions. [2022-02-10 03:32:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:32:53,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:53,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:53,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:53,474 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 [2022-02-10 03:32:53,474 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1391186691, now seen corresponding path program 25 times [2022-02-10 03:32:53,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:53,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284576636] [2022-02-10 03:32:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:53,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:53,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:53,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284576636] [2022-02-10 03:32:53,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284576636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:53,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705762980] [2022-02-10 03:32:53,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:32:53,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:53,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:53,769 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:53,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:32:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-10 03:32:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:53,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-10 03:32:54,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:54,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:54,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:54,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:54,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:54,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:32:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:32:54,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705762980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:54,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:54,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-10 03:32:54,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500795500] [2022-02-10 03:32:54,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:54,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:32:54,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:32:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:32:54,668 INFO L87 Difference]: Start difference. First operand 158 states and 192 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-02-10 03:32:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:55,286 INFO L93 Difference]: Finished difference Result 187 states and 224 transitions. [2022-02-10 03:32:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:32:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 35 [2022-02-10 03:32:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:55,287 INFO L225 Difference]: With dead ends: 187 [2022-02-10 03:32:55,287 INFO L226 Difference]: Without dead ends: 179 [2022-02-10 03:32:55,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:32:55,289 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:55,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 138 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:32:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-10 03:32:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2022-02-10 03:32:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.2108843537414966) internal successors, (178), 147 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2022-02-10 03:32:55,292 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 35 [2022-02-10 03:32:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:55,292 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2022-02-10 03:32:55,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2022-02-10 03:32:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2022-02-10 03:32:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:32:55,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:55,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:55,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-10 03:32:55,509 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 [2022-02-10 03:32:55,510 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash -823512197, now seen corresponding path program 26 times [2022-02-10 03:32:55,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:55,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035614055] [2022-02-10 03:32:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:55,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-10 03:32:55,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:55,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035614055] [2022-02-10 03:32:55,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035614055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:55,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689929541] [2022-02-10 03:32:55,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:32:55,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:55,833 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:55,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:32:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:32:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:32:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:56,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:56,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-10 03:32:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:56,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:56,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:56,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:56,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:32:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-10 03:32:56,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689929541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:56,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:56,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-10 03:32:56,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479922805] [2022-02-10 03:32:56,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:56,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:32:56,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:56,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:32:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:32:56,566 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:32:56,996 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2022-02-10 03:32:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:32:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:32:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:32:56,997 INFO L225 Difference]: With dead ends: 164 [2022-02-10 03:32:56,997 INFO L226 Difference]: Without dead ends: 158 [2022-02-10 03:32:56,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 47 SyntacticMatches, 34 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:32:56,998 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:32:56,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 85 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:32:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-10 03:32:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2022-02-10 03:32:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-02-10 03:32:57,000 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 43 [2022-02-10 03:32:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:32:57,001 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-02-10 03:32:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:32:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-02-10 03:32:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:32:57,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:32:57,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:32:57,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:32:57,217 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 [2022-02-10 03:32:57,218 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:32:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:32:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1348514683, now seen corresponding path program 27 times [2022-02-10 03:32:57,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:32:57,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96471863] [2022-02-10 03:32:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:32:57,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:32:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:32:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-10 03:32:57,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:32:57,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96471863] [2022-02-10 03:32:57,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96471863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:32:57,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787460183] [2022-02-10 03:32:57,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:32:57,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:32:57,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:32:57,476 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:32:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:32:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-10 03:32:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:32:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 03:32:57,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:32:57,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:32:57,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:32:57,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:32:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:32:57,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:32:58,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:58,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:32:58,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:32:58,431 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 26 treesize of output 28 [2022-02-10 03:32:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:32:59,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787460183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:32:59,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:32:59,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-02-10 03:32:59,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882262209] [2022-02-10 03:32:59,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:32:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-10 03:32:59,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:32:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-10 03:32:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2022-02-10 03:32:59,010 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:01,142 INFO L93 Difference]: Finished difference Result 271 states and 318 transitions. [2022-02-10 03:33:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-10 03:33:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:01,143 INFO L225 Difference]: With dead ends: 271 [2022-02-10 03:33:01,143 INFO L226 Difference]: Without dead ends: 265 [2022-02-10 03:33:01,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1290, Invalid=7452, Unknown=0, NotChecked=0, Total=8742 [2022-02-10 03:33:01,145 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:01,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 166 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 533 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-02-10 03:33:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-10 03:33:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 143. [2022-02-10 03:33:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1830985915492958) internal successors, (168), 142 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-02-10 03:33:01,148 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 43 [2022-02-10 03:33:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:01,148 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-02-10 03:33:01,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-02-10 03:33:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:01,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:01,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:01,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:01,349 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 [2022-02-10 03:33:01,349 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash 926783503, now seen corresponding path program 28 times [2022-02-10 03:33:01,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:01,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118979586] [2022-02-10 03:33:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:01,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:33:01,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:01,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118979586] [2022-02-10 03:33:01,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118979586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:01,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523489196] [2022-02-10 03:33:01,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:33:01,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:01,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:01,667 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:01,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:33:01,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:33:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:33:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:01,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:02,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:33:02,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:02,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:02,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:02,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:02,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-10 03:33:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:33:02,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523489196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:02,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:02,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-10 03:33:02,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897364206] [2022-02-10 03:33:02,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:33:02,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:33:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:33:02,675 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2022-02-10 03:33:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:03,397 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2022-02-10 03:33:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:33:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 43 [2022-02-10 03:33:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:03,398 INFO L225 Difference]: With dead ends: 164 [2022-02-10 03:33:03,398 INFO L226 Difference]: Without dead ends: 158 [2022-02-10 03:33:03,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 56 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=2154, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:33:03,399 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 97 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 88 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:33:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-10 03:33:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2022-02-10 03:33:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-02-10 03:33:03,401 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 43 [2022-02-10 03:33:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-02-10 03:33:03,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2022-02-10 03:33:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-02-10 03:33:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:03,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:03,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:03,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-10 03:33:03,610 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 [2022-02-10 03:33:03,610 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1423578245, now seen corresponding path program 29 times [2022-02-10 03:33:03,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:03,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252101417] [2022-02-10 03:33:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:03,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:03,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:03,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252101417] [2022-02-10 03:33:03,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252101417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:03,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373677583] [2022-02-10 03:33:03,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:33:03,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:03,918 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:03,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:33:03,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:33:03,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:33:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:04,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:04,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:33:04,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:04,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:04,537 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 36 treesize of output 38 [2022-02-10 03:33:04,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:04,608 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 36 treesize of output 38 [2022-02-10 03:33:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:33:05,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373677583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:05,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:05,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 36 [2022-02-10 03:33:05,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739704468] [2022-02-10 03:33:05,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:05,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-10 03:33:05,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-10 03:33:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:33:05,109 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:06,138 INFO L93 Difference]: Finished difference Result 171 states and 199 transitions. [2022-02-10 03:33:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:33:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:06,139 INFO L225 Difference]: With dead ends: 171 [2022-02-10 03:33:06,139 INFO L226 Difference]: Without dead ends: 165 [2022-02-10 03:33:06,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=643, Invalid=3517, Unknown=0, NotChecked=0, Total=4160 [2022-02-10 03:33:06,140 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 268 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:06,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 73 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:33:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-10 03:33:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 103. [2022-02-10 03:33:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.196078431372549) internal successors, (122), 102 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-02-10 03:33:06,143 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 43 [2022-02-10 03:33:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:06,143 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-02-10 03:33:06,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-02-10 03:33:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:06,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:06,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:06,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:06,344 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 [2022-02-10 03:33:06,344 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1042107649, now seen corresponding path program 30 times [2022-02-10 03:33:06,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:06,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659430719] [2022-02-10 03:33:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:06,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:06,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:06,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659430719] [2022-02-10 03:33:06,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659430719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:06,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537460002] [2022-02-10 03:33:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:33:06,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:06,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:06,746 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:06,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:33:06,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:33:06,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 61 conjunts are in the unsatisfiable core [2022-02-10 03:33:06,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 62 [2022-02-10 03:33:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:33:08,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2022-02-10 03:33:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:33:08,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:13,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:13,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:14,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:14,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 116 treesize of output 216 [2022-02-10 03:33:24,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:24,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:24,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 99 treesize of output 189 [2022-02-10 03:33:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:33:28,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537460002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:28,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:28,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 28] total 68 [2022-02-10 03:33:28,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979608112] [2022-02-10 03:33:28,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:28,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-10 03:33:28,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-10 03:33:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=4068, Unknown=0, NotChecked=0, Total=4692 [2022-02-10 03:33:28,380 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 69 states, 69 states have (on average 1.681159420289855) internal successors, (116), 68 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:33,598 INFO L93 Difference]: Finished difference Result 271 states and 334 transitions. [2022-02-10 03:33:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-10 03:33:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.681159420289855) internal successors, (116), 68 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:33,599 INFO L225 Difference]: With dead ends: 271 [2022-02-10 03:33:33,599 INFO L226 Difference]: Without dead ends: 253 [2022-02-10 03:33:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 47 SyntacticMatches, 16 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6068 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2377, Invalid=17929, Unknown=0, NotChecked=0, Total=20306 [2022-02-10 03:33:33,601 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 409 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1060 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:33,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 313 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1290 Invalid, 0 Unknown, 1060 Unchecked, 0.6s Time] [2022-02-10 03:33:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-10 03:33:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2022-02-10 03:33:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2380952380952381) internal successors, (208), 168 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2022-02-10 03:33:33,603 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 43 [2022-02-10 03:33:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:33,603 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2022-02-10 03:33:33,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.681159420289855) internal successors, (116), 68 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2022-02-10 03:33:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:33,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:33,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:33,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-10 03:33:33,804 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 [2022-02-10 03:33:33,804 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1591525485, now seen corresponding path program 31 times [2022-02-10 03:33:33,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:33,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757866997] [2022-02-10 03:33:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:33,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:34,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:34,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757866997] [2022-02-10 03:33:34,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757866997] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:34,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887543172] [2022-02-10 03:33:34,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:33:34,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:34,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:34,150 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:34,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:33:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:33:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:34,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:34,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:34,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:34,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:34,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:34,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-10 03:33:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:35,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887543172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:35,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:35,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-02-10 03:33:35,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937012664] [2022-02-10 03:33:35,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:35,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:33:35,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:33:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:33:35,122 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:35,757 INFO L93 Difference]: Finished difference Result 236 states and 291 transitions. [2022-02-10 03:33:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:33:35,757 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:35,758 INFO L225 Difference]: With dead ends: 236 [2022-02-10 03:33:35,758 INFO L226 Difference]: Without dead ends: 228 [2022-02-10 03:33:35,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2022-02-10 03:33:35,762 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:35,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 124 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:33:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-10 03:33:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 154. [2022-02-10 03:33:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2156862745098038) internal successors, (186), 153 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 186 transitions. [2022-02-10 03:33:35,764 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 186 transitions. Word has length 43 [2022-02-10 03:33:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 186 transitions. [2022-02-10 03:33:35,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 186 transitions. [2022-02-10 03:33:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:35,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:35,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:35,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:35,980 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 [2022-02-10 03:33:35,980 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1979599105, now seen corresponding path program 32 times [2022-02-10 03:33:35,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:35,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021410433] [2022-02-10 03:33:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:35,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:36,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:36,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021410433] [2022-02-10 03:33:36,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021410433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:36,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340601559] [2022-02-10 03:33:36,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:33:36,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:36,278 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:36,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:33:36,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:33:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:33:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:36,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:36,598 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 13 treesize of output 9 [2022-02-10 03:33:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:36,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:36,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:36,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:37,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:37,050 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 30 treesize of output 30 [2022-02-10 03:33:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:37,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340601559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:37,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:37,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-10 03:33:37,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221920828] [2022-02-10 03:33:37,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:37,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:33:37,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:33:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:33:37,253 INFO L87 Difference]: Start difference. First operand 154 states and 186 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2022-02-10 03:33:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:38,050 INFO L93 Difference]: Finished difference Result 237 states and 279 transitions. [2022-02-10 03:33:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 03:33:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 43 [2022-02-10 03:33:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:38,051 INFO L225 Difference]: With dead ends: 237 [2022-02-10 03:33:38,051 INFO L226 Difference]: Without dead ends: 231 [2022-02-10 03:33:38,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=526, Invalid=3634, Unknown=0, NotChecked=0, Total=4160 [2022-02-10 03:33:38,052 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 156 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:38,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 74 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:33:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-02-10 03:33:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 155. [2022-02-10 03:33:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2272727272727273) internal successors, (189), 154 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2022-02-10 03:33:38,055 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 43 [2022-02-10 03:33:38,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2022-02-10 03:33:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2022-02-10 03:33:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2022-02-10 03:33:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:38,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:38,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:38,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-10 03:33:38,271 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 [2022-02-10 03:33:38,271 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1598128509, now seen corresponding path program 33 times [2022-02-10 03:33:38,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:38,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045926339] [2022-02-10 03:33:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:38,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:38,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:38,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045926339] [2022-02-10 03:33:38,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045926339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:38,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398100631] [2022-02-10 03:33:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:33:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:38,605 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:38,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:33:38,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-10 03:33:38,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:33:38,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:38,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:38,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:33:39,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:33:39,092 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:33:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:39,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:39,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:39,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:39,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-10 03:33:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:40,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398100631] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:40,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:40,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-02-10 03:33:40,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970506638] [2022-02-10 03:33:40,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:40,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-10 03:33:40,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:40,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-10 03:33:40,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2157, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:33:40,193 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:41,266 INFO L93 Difference]: Finished difference Result 253 states and 311 transitions. [2022-02-10 03:33:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:33:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:41,267 INFO L225 Difference]: With dead ends: 253 [2022-02-10 03:33:41,267 INFO L226 Difference]: Without dead ends: 243 [2022-02-10 03:33:41,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=917, Invalid=4935, Unknown=0, NotChecked=0, Total=5852 [2022-02-10 03:33:41,268 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:41,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 218 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 464 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-02-10 03:33:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-10 03:33:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 135. [2022-02-10 03:33:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2164179104477613) internal successors, (163), 134 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2022-02-10 03:33:41,271 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 43 [2022-02-10 03:33:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:41,271 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2022-02-10 03:33:41,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2022-02-10 03:33:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:41,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:41,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:41,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:41,482 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 [2022-02-10 03:33:41,482 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -496601345, now seen corresponding path program 34 times [2022-02-10 03:33:41,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:41,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807802139] [2022-02-10 03:33:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:41,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:41,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:41,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807802139] [2022-02-10 03:33:41,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807802139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:41,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624308994] [2022-02-10 03:33:41,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:33:41,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:41,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:41,811 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:41,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:33:41,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:33:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:33:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:42,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:42,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:42,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:42,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:42,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:42,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:42,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:33:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:42,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624308994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:42,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:42,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-10 03:33:42,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759833853] [2022-02-10 03:33:42,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:42,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:33:42,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:33:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:33:42,490 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2022-02-10 03:33:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:43,094 INFO L93 Difference]: Finished difference Result 159 states and 192 transitions. [2022-02-10 03:33:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 03:33:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 43 [2022-02-10 03:33:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:43,094 INFO L225 Difference]: With dead ends: 159 [2022-02-10 03:33:43,094 INFO L226 Difference]: Without dead ends: 153 [2022-02-10 03:33:43,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 03:33:43,095 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:43,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 68 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:33:43,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-10 03:33:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2022-02-10 03:33:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 130 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2022-02-10 03:33:43,124 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 43 [2022-02-10 03:33:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:43,124 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2022-02-10 03:33:43,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2022-02-10 03:33:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2022-02-10 03:33:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-10 03:33:43,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:33:43,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:33:43,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:43,325 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 [2022-02-10 03:33:43,325 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:33:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:33:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash -115130749, now seen corresponding path program 35 times [2022-02-10 03:33:43,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:33:43,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436168896] [2022-02-10 03:33:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:33:43,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:33:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:33:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:43,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:33:43,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436168896] [2022-02-10 03:33:43,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436168896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:33:43,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305652875] [2022-02-10 03:33:43,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:33:43,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:33:43,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:33:43,608 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:33:43,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:33:43,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-10 03:33:43,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:33:43,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-10 03:33:43,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:33:43,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:43,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:33:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:44,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:33:44,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:44,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:33:44,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:33:44,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 28 [2022-02-10 03:33:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-10 03:33:44,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305652875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:33:44,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:33:44,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-02-10 03:33:44,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939348133] [2022-02-10 03:33:44,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:33:44,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:33:44,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:33:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:33:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:33:44,647 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:33:45,349 INFO L93 Difference]: Finished difference Result 141 states and 175 transitions. [2022-02-10 03:33:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:33:45,349 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-10 03:33:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:33:45,349 INFO L225 Difference]: With dead ends: 141 [2022-02-10 03:33:45,349 INFO L226 Difference]: Without dead ends: 0 [2022-02-10 03:33:45,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:33:45,350 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:33:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:33:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-10 03:33:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-10 03:33:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-10 03:33:45,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2022-02-10 03:33:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:33:45,351 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-10 03:33:45,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:33:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-10 03:33:45,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-10 03:33:45,354 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-10 03:33:45,354 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-10 03:33:45,354 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-10 03:33:45,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:33:45,562 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 [2022-02-10 03:33:45,565 INFO L732 BasicCegarLoop]: Path program histogram: [35, 1, 1, 1] [2022-02-10 03:33:45,567 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:33:45,567 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:33:45,569 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:33:45 BasicIcfg [2022-02-10 03:33:45,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:33:45,570 INFO L158 Benchmark]: Toolchain (without parser) took 103361.85ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 201.3MB in the beginning and 456.7MB in the end (delta: -255.5MB). Peak memory consumption was 879.5MB. Max. memory is 8.0GB. [2022-02-10 03:33:45,570 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 240.1MB. Free memory is still 202.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:33:45,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.90ms. Allocated memory is still 240.1MB. Free memory was 201.2MB in the beginning and 199.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-10 03:33:45,570 INFO L158 Benchmark]: Boogie Preprocessor took 17.40ms. Allocated memory is still 240.1MB. Free memory was 199.7MB in the beginning and 198.7MB in the end (delta: 944.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:33:45,570 INFO L158 Benchmark]: RCFGBuilder took 198.25ms. Allocated memory is still 240.1MB. Free memory was 198.7MB in the beginning and 189.5MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 03:33:45,571 INFO L158 Benchmark]: TraceAbstraction took 103110.06ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 189.0MB in the beginning and 456.7MB in the end (delta: -267.8MB). Peak memory consumption was 865.8MB. Max. memory is 8.0GB. [2022-02-10 03:33:45,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 240.1MB. Free memory is still 202.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.90ms. Allocated memory is still 240.1MB. Free memory was 201.2MB in the beginning and 199.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.40ms. Allocated memory is still 240.1MB. Free memory was 199.7MB in the beginning and 198.7MB in the end (delta: 944.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 198.25ms. Allocated memory is still 240.1MB. Free memory was 198.7MB in the beginning and 189.5MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 103110.06ms. Allocated memory was 240.1MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 189.0MB in the beginning and 456.7MB in the end (delta: -267.8MB). Peak memory consumption was 865.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 103.0s, OverallIterations: 38, TraceHistogramMax: 4, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.1s, AutomataDifference: 33.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.0s, PartialOrderReductionTime: 1.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3984 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3984 mSDsluCounter, 4110 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1885 IncrementalHoareTripleChecker+Unchecked, 6290 mSDsCounter, 3935 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18319 IncrementalHoareTripleChecker+Invalid, 24139 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3935 mSolverCounterUnsat, 363 mSDtfsCounter, 18319 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3944 GetRequests, 1514 SyntacticMatches, 484 SemanticMatches, 1946 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34754 ImplicationChecksByTransitivity, 42.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21598occurred in iteration=0, InterpolantAutomatonStates: 1165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 15093 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 58.4s InterpolantComputationTime, 2459 NumberOfCodeBlocks, 2459 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 3538 ConstructedInterpolants, 62 QuantifiedInterpolants, 53371 SizeOfPredicates, 384 NumberOfNonLiveVariables, 3452 ConjunctsInSsa, 990 ConjunctsInUnsatCore, 107 InterpolantComputations, 4 PerfectInterpolantSequences, 473/3325 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-10 03:33:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...