/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-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:33:58,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:33:58,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:33:58,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:33:58,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 14:33:58,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:33:58,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:33:58,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:33:58,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:33:58,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:33:58,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:33:58,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:33:58,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:33:58,323 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:33:58,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:33:58,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:33:58,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:33:58,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:33:58,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:33:58,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:33:58,327 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:33:58,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:33:58,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:33:58,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:33:58,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:33:58,540 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:33:58,542 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:33:58,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2022-02-16 14:33:58,544 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2022-02-16 14:33:58,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:33:58,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:33:58,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:33:58,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:33:58,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:33:58,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,592 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:33:58,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:33:58,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:33:58,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:33:58,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:33:58,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:33:58,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:33:58,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:33:58,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:33:58,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/1) ... [2022-02-16 14:33:58,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:33:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:33:58,631 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) [2022-02-16 14:33:58,639 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 [2022-02-16 14:33:58,661 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:33:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:33:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:33:58,662 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:33:58,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:33:58,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:33:58,662 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:33:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:33:58,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:33:58,663 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:33:58,710 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:33:58,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:33:58,789 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:33:58,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:33:58,803 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:33:58,804 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:33:58 BoogieIcfgContainer [2022-02-16 14:33:58,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:33:58,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:33:58,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:33:58,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:33:58,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:33:58" (1/2) ... [2022-02-16 14:33:58,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d55cb and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:33:58, skipping insertion in model container [2022-02-16 14:33:58,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:33:58" (2/2) ... [2022-02-16 14:33:58,831 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2022-02-16 14:33:58,835 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:33:58,835 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:33:58,835 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:33:58,835 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:33:58,886 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 14:33:58,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:33:58,929 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 [2022-02-16 14:33:58,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 14:33:58,941 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2022-02-16 14:33:58,992 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:00,787 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 69586 transitions and produced 35439 states. [2022-02-16 14:34:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 35439 states, 27608 states have (on average 1.4256374963778615) internal successors, (39359), 35438 states have internal predecessors, (39359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 14:34:01,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:01,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:01,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -341260671, now seen corresponding path program 1 times [2022-02-16 14:34:01,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:01,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477397594] [2022-02-16 14:34:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:01,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:01,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:01,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477397594] [2022-02-16 14:34:01,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477397594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:34:01,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:34:01,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:34:01,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904726] [2022-02-16 14:34:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:34:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:34:01,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:34:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:34:01,558 INFO L87 Difference]: Start difference. First operand has 35439 states, 27608 states have (on average 1.4256374963778615) internal successors, (39359), 35438 states have internal predecessors, (39359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:02,418 INFO L93 Difference]: Finished difference Result 35343 states and 39263 transitions. [2022-02-16 14:34:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:34:02,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 14:34:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:02,502 INFO L225 Difference]: With dead ends: 35343 [2022-02-16 14:34:02,503 INFO L226 Difference]: Without dead ends: 15657 [2022-02-16 14:34:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:34:02,507 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:02,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:34:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15657 states. [2022-02-16 14:34:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15657 to 59. [2022-02-16 14:34:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-02-16 14:34:02,739 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 16 [2022-02-16 14:34:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:02,739 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-02-16 14:34:02,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-02-16 14:34:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:34:02,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:02,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:34:02,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1897997073, now seen corresponding path program 1 times [2022-02-16 14:34:02,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:02,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400961277] [2022-02-16 14:34:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:02,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:03,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:03,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400961277] [2022-02-16 14:34:03,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400961277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:03,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049164284] [2022-02-16 14:34:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:03,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:03,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:03,186 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) [2022-02-16 14:34:03,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:34:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-16 14:34:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:03,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:04,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049164284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:04,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:04,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-16 14:34:04,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358427368] [2022-02-16 14:34:04,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:34:04,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:34:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:34:04,042 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2022-02-16 14:34:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:04,606 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2022-02-16 14:34:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:34:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 21 [2022-02-16 14:34:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:04,608 INFO L225 Difference]: With dead ends: 123 [2022-02-16 14:34:04,608 INFO L226 Difference]: Without dead ends: 119 [2022-02-16 14:34:04,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:34:04,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:04,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 120 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:34:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-16 14:34:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 76. [2022-02-16 14:34:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-02-16 14:34:04,614 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 21 [2022-02-16 14:34:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:04,615 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-02-16 14:34:04,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2022-02-16 14:34:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-02-16 14:34:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:34:04,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:04,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:04,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:04,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:04,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash -242761071, now seen corresponding path program 2 times [2022-02-16 14:34:04,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:04,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450974885] [2022-02-16 14:34:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:04,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:05,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450974885] [2022-02-16 14:34:05,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450974885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:05,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309097430] [2022-02-16 14:34:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:34:05,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:05,059 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) [2022-02-16 14:34:05,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:34:05,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:34:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-16 14:34:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:05,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:05,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309097430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:05,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:05,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-02-16 14:34:05,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122433052] [2022-02-16 14:34:05,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:05,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:34:05,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:34:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:34:05,612 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:06,003 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-02-16 14:34:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:34:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:34:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:06,004 INFO L225 Difference]: With dead ends: 132 [2022-02-16 14:34:06,004 INFO L226 Difference]: Without dead ends: 128 [2022-02-16 14:34:06,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:34:06,006 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:06,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 112 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:34:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-16 14:34:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 83. [2022-02-16 14:34:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2022-02-16 14:34:06,011 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 21 [2022-02-16 14:34:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:06,011 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2022-02-16 14:34:06,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2022-02-16 14:34:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:34:06,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:06,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:06,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:06,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-16 14:34:06,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1912680525, now seen corresponding path program 1 times [2022-02-16 14:34:06,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:06,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743693576] [2022-02-16 14:34:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:06,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:06,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:06,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743693576] [2022-02-16 14:34:06,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743693576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:06,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084752951] [2022-02-16 14:34:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:06,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:06,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:06,272 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) [2022-02-16 14:34:06,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:34:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:34:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:06,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-16 14:34:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:06,432 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 14:34:06,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-02-16 14:34:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:06,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084752951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:06,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:06,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-16 14:34:06,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789254263] [2022-02-16 14:34:06,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:06,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 14:34:06,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 14:34:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:34:06,443 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:06,502 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2022-02-16 14:34:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:34:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:34:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:06,504 INFO L225 Difference]: With dead ends: 129 [2022-02-16 14:34:06,504 INFO L226 Difference]: Without dead ends: 123 [2022-02-16 14:34:06,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-16 14:34:06,505 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:06,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 136 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:34:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-16 14:34:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2022-02-16 14:34:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 92 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2022-02-16 14:34:06,510 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 25 [2022-02-16 14:34:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:06,511 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2022-02-16 14:34:06,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2022-02-16 14:34:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-16 14:34:06,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:06,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:06,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:06,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:06,727 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1975771007, now seen corresponding path program 3 times [2022-02-16 14:34:06,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:06,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70702129] [2022-02-16 14:34:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:06,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:06,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:06,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70702129] [2022-02-16 14:34:06,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70702129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:34:06,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:34:06,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:34:06,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613306387] [2022-02-16 14:34:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:34:06,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:34:06,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:34:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:34:06,778 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:06,801 INFO L93 Difference]: Finished difference Result 228 states and 288 transitions. [2022-02-16 14:34:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:34:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-16 14:34:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:06,803 INFO L225 Difference]: With dead ends: 228 [2022-02-16 14:34:06,804 INFO L226 Difference]: Without dead ends: 197 [2022-02-16 14:34:06,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:34:06,805 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:34:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-16 14:34:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2022-02-16 14:34:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2880434782608696) internal successors, (237), 184 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2022-02-16 14:34:06,848 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 26 [2022-02-16 14:34:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2022-02-16 14:34:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2022-02-16 14:34:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:06,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:06,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:06,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-16 14:34:06,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1430325051, now seen corresponding path program 2 times [2022-02-16 14:34:06,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:06,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989952297] [2022-02-16 14:34:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:06,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:07,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:07,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989952297] [2022-02-16 14:34:07,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989952297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:07,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064511888] [2022-02-16 14:34:07,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:34:07,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:07,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:07,347 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) [2022-02-16 14:34:07,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:34:07,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:34:07,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 14:34:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:07,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-16 14:34:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:08,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:08,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-16 14:34:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:08,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064511888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:08,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:08,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-02-16 14:34:08,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307093413] [2022-02-16 14:34:08,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:08,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-16 14:34:08,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-16 14:34:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:34:08,929 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2022-02-16 14:34:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:10,309 INFO L93 Difference]: Finished difference Result 296 states and 373 transitions. [2022-02-16 14:34:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:34:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:10,311 INFO L225 Difference]: With dead ends: 296 [2022-02-16 14:34:10,311 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 14:34:10,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:34:10,313 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 95 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:10,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:34:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 14:34:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 194. [2022-02-16 14:34:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.2797927461139897) internal successors, (247), 193 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 247 transitions. [2022-02-16 14:34:10,322 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 247 transitions. Word has length 30 [2022-02-16 14:34:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 247 transitions. [2022-02-16 14:34:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2022-02-16 14:34:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 247 transitions. [2022-02-16 14:34:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:10,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:10,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:10,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:10,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:10,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1017642623, now seen corresponding path program 3 times [2022-02-16 14:34:10,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:10,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340780703] [2022-02-16 14:34:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:10,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:11,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:11,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340780703] [2022-02-16 14:34:11,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340780703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:11,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549313955] [2022-02-16 14:34:11,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:34:11,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:11,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:11,003 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) [2022-02-16 14:34:11,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:34:11,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:34:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:34:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:11,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-16 14:34:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:11,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:12,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:12,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-16 14:34:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:12,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549313955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:12,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:12,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-02-16 14:34:12,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924038890] [2022-02-16 14:34:12,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:12,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-16 14:34:12,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-16 14:34:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:34:12,346 INFO L87 Difference]: Start difference. First operand 194 states and 247 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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) [2022-02-16 14:34:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:13,747 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2022-02-16 14:34:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 14:34:13,748 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:13,749 INFO L225 Difference]: With dead ends: 322 [2022-02-16 14:34:13,749 INFO L226 Difference]: Without dead ends: 310 [2022-02-16 14:34:13,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=2997, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:34:13,750 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:13,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 339 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:34:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-16 14:34:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 201. [2022-02-16 14:34:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.275) internal successors, (255), 200 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 255 transitions. [2022-02-16 14:34:13,757 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 255 transitions. Word has length 30 [2022-02-16 14:34:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:13,757 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 255 transitions. [2022-02-16 14:34:13,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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) [2022-02-16 14:34:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 255 transitions. [2022-02-16 14:34:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:13,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:13,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:13,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:13,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1492121275, now seen corresponding path program 4 times [2022-02-16 14:34:13,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:13,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725865615] [2022-02-16 14:34:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:13,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:14,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:14,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725865615] [2022-02-16 14:34:14,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725865615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:14,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386311246] [2022-02-16 14:34:14,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:34:14,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:14,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:14,366 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) [2022-02-16 14:34:14,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:34:14,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:34:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 14:34:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:14,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-16 14:34:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:14,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:15,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:15,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-16 14:34:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:15,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386311246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:15,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:15,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 38 [2022-02-16 14:34:15,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630503029] [2022-02-16 14:34:15,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:15,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-16 14:34:15,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-16 14:34:15,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:34:15,526 INFO L87 Difference]: Start difference. First operand 201 states and 255 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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) [2022-02-16 14:34:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:16,661 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2022-02-16 14:34:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:34:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:16,674 INFO L225 Difference]: With dead ends: 314 [2022-02-16 14:34:16,674 INFO L226 Difference]: Without dead ends: 300 [2022-02-16 14:34:16,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=2879, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:34:16,677 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:16,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 232 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:34:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-16 14:34:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 200. [2022-02-16 14:34:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.271356783919598) internal successors, (253), 199 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 253 transitions. [2022-02-16 14:34:16,687 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 253 transitions. Word has length 30 [2022-02-16 14:34:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 253 transitions. [2022-02-16 14:34:16,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 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) [2022-02-16 14:34:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 253 transitions. [2022-02-16 14:34:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:16,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:16,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:16,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:16,911 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash -160682273, now seen corresponding path program 5 times [2022-02-16 14:34:16,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:16,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555678154] [2022-02-16 14:34:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:16,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:17,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:17,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555678154] [2022-02-16 14:34:17,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555678154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:17,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988391392] [2022-02-16 14:34:17,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:34:17,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:17,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:17,311 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) [2022-02-16 14:34:17,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:34:17,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:34:17,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:34:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:17,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-16 14:34:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:17,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:18,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:18,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-16 14:34:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:18,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988391392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:18,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:18,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-02-16 14:34:18,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287799760] [2022-02-16 14:34:18,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:18,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-16 14:34:18,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:18,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-16 14:34:18,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:34:18,650 INFO L87 Difference]: Start difference. First operand 200 states and 253 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:20,026 INFO L93 Difference]: Finished difference Result 311 states and 387 transitions. [2022-02-16 14:34:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:34:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:20,028 INFO L225 Difference]: With dead ends: 311 [2022-02-16 14:34:20,028 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 14:34:20,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=3799, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:34:20,030 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:20,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 281 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:34:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 14:34:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 192. [2022-02-16 14:34:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2774869109947644) internal successors, (244), 191 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 244 transitions. [2022-02-16 14:34:20,038 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 244 transitions. Word has length 30 [2022-02-16 14:34:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:20,038 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 244 transitions. [2022-02-16 14:34:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 244 transitions. [2022-02-16 14:34:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:20,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:20,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:20,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:20,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:20,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -742864255, now seen corresponding path program 6 times [2022-02-16 14:34:20,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:20,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321981233] [2022-02-16 14:34:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:20,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:20,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:20,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321981233] [2022-02-16 14:34:20,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321981233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:20,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369245744] [2022-02-16 14:34:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:34:20,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:20,599 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) [2022-02-16 14:34:20,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:34:20,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:34:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 14:34:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:20,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-16 14:34:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:21,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:21,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:21,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-16 14:34:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:21,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369245744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:21,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:21,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-02-16 14:34:21,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611918061] [2022-02-16 14:34:21,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 14:34:21,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 14:34:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:34:21,564 INFO L87 Difference]: Start difference. First operand 192 states and 244 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:22,425 INFO L93 Difference]: Finished difference Result 264 states and 338 transitions. [2022-02-16 14:34:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:34:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:22,426 INFO L225 Difference]: With dead ends: 264 [2022-02-16 14:34:22,426 INFO L226 Difference]: Without dead ends: 252 [2022-02-16 14:34:22,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:34:22,428 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:22,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:34:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-16 14:34:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 192. [2022-02-16 14:34:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2722513089005236) internal successors, (243), 191 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 243 transitions. [2022-02-16 14:34:22,432 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 243 transitions. Word has length 30 [2022-02-16 14:34:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:22,432 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 243 transitions. [2022-02-16 14:34:22,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 243 transitions. [2022-02-16 14:34:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-16 14:34:22,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:22,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:22,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-16 14:34:22,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-16 14:34:22,643 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1217342907, now seen corresponding path program 7 times [2022-02-16 14:34:22,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:22,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325510589] [2022-02-16 14:34:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:22,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:23,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:23,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325510589] [2022-02-16 14:34:23,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325510589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:23,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675498512] [2022-02-16 14:34:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:34:23,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:23,046 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) [2022-02-16 14:34:23,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:34:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-16 14:34:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:23,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-16 14:34:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:23,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:23,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:34:23,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-16 14:34:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:24,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675498512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:24,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:24,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-02-16 14:34:24,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954707009] [2022-02-16 14:34:24,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:24,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:34:24,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:34:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:34:24,052 INFO L87 Difference]: Start difference. First operand 192 states and 243 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:25,008 INFO L93 Difference]: Finished difference Result 260 states and 333 transitions. [2022-02-16 14:34:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 14:34:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-16 14:34:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:25,010 INFO L225 Difference]: With dead ends: 260 [2022-02-16 14:34:25,010 INFO L226 Difference]: Without dead ends: 246 [2022-02-16 14:34:25,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=2513, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:34:25,012 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 135 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 14:34:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-16 14:34:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 187. [2022-02-16 14:34:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 186 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 237 transitions. [2022-02-16 14:34:25,016 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 237 transitions. Word has length 30 [2022-02-16 14:34:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:25,016 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 237 transitions. [2022-02-16 14:34:25,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 237 transitions. [2022-02-16 14:34:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:34:25,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:25,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:25,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:25,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1579938039, now seen corresponding path program 8 times [2022-02-16 14:34:25,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:25,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593776618] [2022-02-16 14:34:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:25,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:25,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:25,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593776618] [2022-02-16 14:34:25,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593776618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:25,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674780539] [2022-02-16 14:34:25,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:34:25,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:25,317 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) [2022-02-16 14:34:25,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:34:25,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:34:25,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-16 14:34:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:25,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 14:34:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:25,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:25,535 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-16 14:34:25,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-02-16 14:34:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:25,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674780539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:25,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:25,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-16 14:34:25,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743165860] [2022-02-16 14:34:25,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:25,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 14:34:25,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 14:34:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-16 14:34:25,556 INFO L87 Difference]: Start difference. First operand 187 states and 237 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 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) [2022-02-16 14:34:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:25,822 INFO L93 Difference]: Finished difference Result 334 states and 423 transitions. [2022-02-16 14:34:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:34:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:34:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:25,824 INFO L225 Difference]: With dead ends: 334 [2022-02-16 14:34:25,824 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 14:34:25,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:34:25,825 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 198 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:25,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 400 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:34:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 14:34:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 214. [2022-02-16 14:34:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.2816901408450705) internal successors, (273), 213 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 273 transitions. [2022-02-16 14:34:25,829 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 273 transitions. Word has length 34 [2022-02-16 14:34:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:25,830 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 273 transitions. [2022-02-16 14:34:25,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 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) [2022-02-16 14:34:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 273 transitions. [2022-02-16 14:34:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:34:25,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:25,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:25,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-16 14:34:26,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1982053197, now seen corresponding path program 9 times [2022-02-16 14:34:26,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:26,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581342068] [2022-02-16 14:34:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:26,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:26,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:26,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581342068] [2022-02-16 14:34:26,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581342068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:26,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355020782] [2022-02-16 14:34:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:34:26,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:26,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:26,084 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) [2022-02-16 14:34:26,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:34:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:34:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:34:26,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:26,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355020782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:26,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:26,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-16 14:34:26,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928543613] [2022-02-16 14:34:26,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:26,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:34:26,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:34:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:34:26,228 INFO L87 Difference]: Start difference. First operand 214 states and 273 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:26,248 INFO L93 Difference]: Finished difference Result 490 states and 628 transitions. [2022-02-16 14:34:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:34:26,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:34:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:26,249 INFO L225 Difference]: With dead ends: 490 [2022-02-16 14:34:26,249 INFO L226 Difference]: Without dead ends: 448 [2022-02-16 14:34:26,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:34:26,250 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:26,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 97 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:34:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-16 14:34:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 402. [2022-02-16 14:34:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.3167082294264338) internal successors, (528), 401 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 528 transitions. [2022-02-16 14:34:26,258 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 528 transitions. Word has length 35 [2022-02-16 14:34:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:26,258 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 528 transitions. [2022-02-16 14:34:26,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 528 transitions. [2022-02-16 14:34:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:26,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:26,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:26,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-16 14:34:26,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-16 14:34:26,476 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1563037815, now seen corresponding path program 10 times [2022-02-16 14:34:26,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:26,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090065553] [2022-02-16 14:34:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:26,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:27,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:27,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090065553] [2022-02-16 14:34:27,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090065553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:27,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802051128] [2022-02-16 14:34:27,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:34:27,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:27,264 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) [2022-02-16 14:34:27,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:34:27,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:34:27,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:27,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:34:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:28,093 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-16 14:34:28,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-02-16 14:34:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:28,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:29,729 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:29,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:34:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:29,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802051128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:29,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:29,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 64 [2022-02-16 14:34:29,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446574017] [2022-02-16 14:34:29,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:29,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-16 14:34:29,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-16 14:34:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 14:34:29,862 INFO L87 Difference]: Start difference. First operand 402 states and 528 transitions. Second operand has 65 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 64 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:32,274 INFO L93 Difference]: Finished difference Result 714 states and 932 transitions. [2022-02-16 14:34:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:34:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 64 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:34:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:32,277 INFO L225 Difference]: With dead ends: 714 [2022-02-16 14:34:32,277 INFO L226 Difference]: Without dead ends: 710 [2022-02-16 14:34:32,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=491, Invalid=8065, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:34:32,279 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 120 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:32,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 441 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1948 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-02-16 14:34:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-16 14:34:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 408. [2022-02-16 14:34:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.3144963144963144) internal successors, (535), 407 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 535 transitions. [2022-02-16 14:34:32,290 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 535 transitions. Word has length 39 [2022-02-16 14:34:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:32,291 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 535 transitions. [2022-02-16 14:34:32,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 64 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 535 transitions. [2022-02-16 14:34:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:32,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:32,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:32,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:32,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-16 14:34:32,514 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 96007305, now seen corresponding path program 11 times [2022-02-16 14:34:32,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:32,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832866910] [2022-02-16 14:34:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:32,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:33,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:33,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832866910] [2022-02-16 14:34:33,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832866910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:33,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495240601] [2022-02-16 14:34:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:34:33,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:33,171 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) [2022-02-16 14:34:33,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:34:33,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:34:33,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:33,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:34:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:33,809 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:34:33,809 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 25 treesize of output 13 [2022-02-16 14:34:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:35,159 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:35,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:34:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:35,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495240601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:35,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:35,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 56 [2022-02-16 14:34:35,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064933018] [2022-02-16 14:34:35,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:35,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-16 14:34:35,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-16 14:34:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2979, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:34:35,281 INFO L87 Difference]: Start difference. First operand 408 states and 535 transitions. Second operand has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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) [2022-02-16 14:34:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:37,419 INFO L93 Difference]: Finished difference Result 790 states and 1022 transitions. [2022-02-16 14:34:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-16 14:34:37,419 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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 39 [2022-02-16 14:34:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:37,421 INFO L225 Difference]: With dead ends: 790 [2022-02-16 14:34:37,421 INFO L226 Difference]: Without dead ends: 778 [2022-02-16 14:34:37,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=470, Invalid=6670, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:34:37,423 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:37,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 478 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1946 Invalid, 0 Unknown, 17 Unchecked, 0.8s Time] [2022-02-16 14:34:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-16 14:34:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 436. [2022-02-16 14:34:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.3080459770114943) internal successors, (569), 435 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 569 transitions. [2022-02-16 14:34:37,431 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 569 transitions. Word has length 39 [2022-02-16 14:34:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:37,432 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 569 transitions. [2022-02-16 14:34:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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) [2022-02-16 14:34:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 569 transitions. [2022-02-16 14:34:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:37,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:37,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:37,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:37,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 14:34:37,647 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash -378471347, now seen corresponding path program 12 times [2022-02-16 14:34:37,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:37,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53491242] [2022-02-16 14:34:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:37,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:38,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:38,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53491242] [2022-02-16 14:34:38,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53491242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:38,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572215012] [2022-02-16 14:34:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:34:38,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:38,287 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) [2022-02-16 14:34:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:34:38,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:34:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:38,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:34:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:38,930 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:34:38,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:34:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:39,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:40,221 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:40,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:34:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:40,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572215012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:40,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:40,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2022-02-16 14:34:40,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395621845] [2022-02-16 14:34:40,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-16 14:34:40,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-16 14:34:40,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:34:40,325 INFO L87 Difference]: Start difference. First operand 436 states and 569 transitions. Second operand has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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) [2022-02-16 14:34:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:42,164 INFO L93 Difference]: Finished difference Result 679 states and 876 transitions. [2022-02-16 14:34:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:34:42,167 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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 39 [2022-02-16 14:34:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:42,169 INFO L225 Difference]: With dead ends: 679 [2022-02-16 14:34:42,169 INFO L226 Difference]: Without dead ends: 662 [2022-02-16 14:34:42,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=446, Invalid=6034, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:34:42,172 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:42,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 420 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1837 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2022-02-16 14:34:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-16 14:34:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 426. [2022-02-16 14:34:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.3082352941176472) internal successors, (556), 425 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 556 transitions. [2022-02-16 14:34:42,179 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 556 transitions. Word has length 39 [2022-02-16 14:34:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:42,180 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 556 transitions. [2022-02-16 14:34:42,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7719298245614035) internal successors, (101), 56 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) [2022-02-16 14:34:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 556 transitions. [2022-02-16 14:34:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:42,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:42,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:42,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:42,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:42,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash -652529911, now seen corresponding path program 13 times [2022-02-16 14:34:42,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:42,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344316658] [2022-02-16 14:34:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:42,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:43,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:43,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344316658] [2022-02-16 14:34:43,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344316658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:43,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504185954] [2022-02-16 14:34:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:34:43,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:43,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:43,017 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) [2022-02-16 14:34:43,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:34:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:43,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:34:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:43,675 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-16 14:34:43,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-02-16 14:34:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:44,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:45,095 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:45,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:34:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:45,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504185954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:45,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:45,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 58 [2022-02-16 14:34:45,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191265816] [2022-02-16 14:34:45,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:45,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-16 14:34:45,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-16 14:34:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3202, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:34:45,209 INFO L87 Difference]: Start difference. First operand 426 states and 556 transitions. Second operand has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 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) [2022-02-16 14:34:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:47,315 INFO L93 Difference]: Finished difference Result 738 states and 953 transitions. [2022-02-16 14:34:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:34:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 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 39 [2022-02-16 14:34:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:47,317 INFO L225 Difference]: With dead ends: 738 [2022-02-16 14:34:47,317 INFO L226 Difference]: Without dead ends: 719 [2022-02-16 14:34:47,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=462, Invalid=6678, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:34:47,319 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:47,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 521 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2265 Invalid, 0 Unknown, 32 Unchecked, 0.9s Time] [2022-02-16 14:34:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-02-16 14:34:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 422. [2022-02-16 14:34:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.3064133016627077) internal successors, (550), 421 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 550 transitions. [2022-02-16 14:34:47,326 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 550 transitions. Word has length 39 [2022-02-16 14:34:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:47,326 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 550 transitions. [2022-02-16 14:34:47,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 58 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) [2022-02-16 14:34:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 550 transitions. [2022-02-16 14:34:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:47,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:47,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:47,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:47,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-16 14:34:47,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1851800873, now seen corresponding path program 14 times [2022-02-16 14:34:47,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:47,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253203466] [2022-02-16 14:34:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:47,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:48,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:48,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253203466] [2022-02-16 14:34:48,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253203466] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:48,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061990523] [2022-02-16 14:34:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:34:48,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:48,221 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) [2022-02-16 14:34:48,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:34:48,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:34:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:48,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:34:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:48,841 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:34:48,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:34:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:49,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:50,349 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:50,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:34:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:50,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061990523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:50,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:50,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 61 [2022-02-16 14:34:50,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198387220] [2022-02-16 14:34:50,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:50,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-16 14:34:50,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-16 14:34:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3546, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:34:50,480 INFO L87 Difference]: Start difference. First operand 422 states and 550 transitions. Second operand has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:52,979 INFO L93 Difference]: Finished difference Result 737 states and 951 transitions. [2022-02-16 14:34:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:34:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:34:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:52,981 INFO L225 Difference]: With dead ends: 737 [2022-02-16 14:34:52,981 INFO L226 Difference]: Without dead ends: 717 [2022-02-16 14:34:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=527, Invalid=7845, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:34:52,982 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:52,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 611 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2882 Invalid, 0 Unknown, 30 Unchecked, 1.1s Time] [2022-02-16 14:34:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-16 14:34:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 416. [2022-02-16 14:34:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.308433734939759) internal successors, (543), 415 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 543 transitions. [2022-02-16 14:34:52,988 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 543 transitions. Word has length 39 [2022-02-16 14:34:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 543 transitions. [2022-02-16 14:34:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 543 transitions. [2022-02-16 14:34:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:52,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:52,990 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:53,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-16 14:34:53,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 14:34:53,211 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash -312968785, now seen corresponding path program 15 times [2022-02-16 14:34:53,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:53,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295732073] [2022-02-16 14:34:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:53,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:53,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:53,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295732073] [2022-02-16 14:34:53,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295732073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:53,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257285491] [2022-02-16 14:34:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:34:53,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:53,836 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) [2022-02-16 14:34:53,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:34:53,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:34:53,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:53,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:34:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:34:54,706 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:34:54,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:34:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:55,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:34:56,323 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:34:56,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 69 [2022-02-16 14:34:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:56,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257285491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:34:56,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:34:56,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 65 [2022-02-16 14:34:56,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727107319] [2022-02-16 14:34:56,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:34:56,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-16 14:34:56,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:34:56,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-16 14:34:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4021, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 14:34:56,496 INFO L87 Difference]: Start difference. First operand 416 states and 543 transitions. Second operand has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:34:58,716 INFO L93 Difference]: Finished difference Result 706 states and 918 transitions. [2022-02-16 14:34:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:34:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:34:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:34:58,718 INFO L225 Difference]: With dead ends: 706 [2022-02-16 14:34:58,718 INFO L226 Difference]: Without dead ends: 682 [2022-02-16 14:34:58,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=522, Invalid=7850, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:34:58,720 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:34:58,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 483 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2264 Invalid, 0 Unknown, 15 Unchecked, 0.9s Time] [2022-02-16 14:34:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-16 14:34:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 411. [2022-02-16 14:34:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.3097560975609757) internal successors, (537), 410 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 537 transitions. [2022-02-16 14:34:58,727 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 537 transitions. Word has length 39 [2022-02-16 14:34:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:34:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 537 transitions. [2022-02-16 14:34:58,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:34:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 537 transitions. [2022-02-16 14:34:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:34:58,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:34:58,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:34:58,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:34:58,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:58,928 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:34:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:34:58,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1251771857, now seen corresponding path program 16 times [2022-02-16 14:34:58,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:34:58,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282718285] [2022-02-16 14:34:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:34:58,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:34:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:34:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:34:59,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:34:59,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282718285] [2022-02-16 14:34:59,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282718285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:34:59,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666312402] [2022-02-16 14:34:59,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:34:59,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:34:59,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:34:59,506 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) [2022-02-16 14:34:59,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:34:59,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:34:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:34:59,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:34:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:00,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:01,522 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:01,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:01,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666312402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:01,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:01,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 55 [2022-02-16 14:35:01,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195521421] [2022-02-16 14:35:01,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:01,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:35:01,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:35:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:35:01,628 INFO L87 Difference]: Start difference. First operand 411 states and 537 transitions. Second operand has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:03,025 INFO L93 Difference]: Finished difference Result 588 states and 791 transitions. [2022-02-16 14:35:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:35:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:03,027 INFO L225 Difference]: With dead ends: 588 [2022-02-16 14:35:03,027 INFO L226 Difference]: Without dead ends: 576 [2022-02-16 14:35:03,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:35:03,028 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:03,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 388 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1457 Invalid, 0 Unknown, 210 Unchecked, 0.6s Time] [2022-02-16 14:35:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-16 14:35:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 425. [2022-02-16 14:35:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.304245283018868) internal successors, (553), 424 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 553 transitions. [2022-02-16 14:35:03,035 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 553 transitions. Word has length 39 [2022-02-16 14:35:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 553 transitions. [2022-02-16 14:35:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 553 transitions. [2022-02-16 14:35:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:03,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:03,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:03,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:03,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:03,260 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash 777293205, now seen corresponding path program 17 times [2022-02-16 14:35:03,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:03,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303561986] [2022-02-16 14:35:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:03,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:03,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:03,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303561986] [2022-02-16 14:35:03,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303561986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:03,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604049831] [2022-02-16 14:35:03,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:03,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:03,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:03,892 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) [2022-02-16 14:35:03,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:35:03,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:35:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:03,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-16 14:35:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:04,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:05,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:06,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:06,318 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-02-16 14:35:06,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 61 [2022-02-16 14:35:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:06,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604049831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:06,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:06,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 68 [2022-02-16 14:35:06,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217220850] [2022-02-16 14:35:06,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:06,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-16 14:35:06,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-16 14:35:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:35:06,563 INFO L87 Difference]: Start difference. First operand 425 states and 553 transitions. Second operand has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 68 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) [2022-02-16 14:35:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:08,980 INFO L93 Difference]: Finished difference Result 505 states and 673 transitions. [2022-02-16 14:35:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:35:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 68 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 39 [2022-02-16 14:35:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:08,982 INFO L225 Difference]: With dead ends: 505 [2022-02-16 14:35:08,982 INFO L226 Difference]: Without dead ends: 491 [2022-02-16 14:35:08,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=856, Invalid=8846, Unknown=0, NotChecked=0, Total=9702 [2022-02-16 14:35:08,983 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:08,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 214 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1035 Invalid, 0 Unknown, 127 Unchecked, 0.5s Time] [2022-02-16 14:35:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-02-16 14:35:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 423. [2022-02-16 14:35:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.3033175355450237) internal successors, (550), 422 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 550 transitions. [2022-02-16 14:35:08,988 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 550 transitions. Word has length 39 [2022-02-16 14:35:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:08,988 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 550 transitions. [2022-02-16 14:35:08,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5942028985507246) internal successors, (110), 68 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) [2022-02-16 14:35:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 550 transitions. [2022-02-16 14:35:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:08,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:08,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:09,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-16 14:35:09,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:09,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -741189109, now seen corresponding path program 18 times [2022-02-16 14:35:09,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:09,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824757258] [2022-02-16 14:35:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:09,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:09,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:09,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824757258] [2022-02-16 14:35:09,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824757258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:09,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655658561] [2022-02-16 14:35:09,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:35:09,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:09,827 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) [2022-02-16 14:35:09,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:35:09,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:35:09,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:09,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-16 14:35:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:10,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:12,067 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:12,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 69 [2022-02-16 14:35:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:12,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655658561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:12,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:12,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 59 [2022-02-16 14:35:12,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385899874] [2022-02-16 14:35:12,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:12,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-16 14:35:12,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-16 14:35:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:35:12,180 INFO L87 Difference]: Start difference. First operand 423 states and 550 transitions. Second operand has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:15,330 INFO L93 Difference]: Finished difference Result 800 states and 1039 transitions. [2022-02-16 14:35:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:35:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:15,333 INFO L225 Difference]: With dead ends: 800 [2022-02-16 14:35:15,333 INFO L226 Difference]: Without dead ends: 786 [2022-02-16 14:35:15,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=758, Invalid=8554, Unknown=0, NotChecked=0, Total=9312 [2022-02-16 14:35:15,334 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:15,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 411 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-16 14:35:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-02-16 14:35:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 436. [2022-02-16 14:35:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.303448275862069) internal successors, (567), 435 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 567 transitions. [2022-02-16 14:35:15,342 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 567 transitions. Word has length 39 [2022-02-16 14:35:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:15,342 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 567 transitions. [2022-02-16 14:35:15,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 567 transitions. [2022-02-16 14:35:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:15,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:15,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:15,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:15,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-16 14:35:15,565 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1215667761, now seen corresponding path program 19 times [2022-02-16 14:35:15,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:15,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437975348] [2022-02-16 14:35:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:15,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:16,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:16,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437975348] [2022-02-16 14:35:16,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437975348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:16,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634418401] [2022-02-16 14:35:16,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:35:16,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:16,170 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) [2022-02-16 14:35:16,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:35:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:16,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:35:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:16,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:16,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:18,219 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:18,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:18,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634418401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:18,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:18,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 55 [2022-02-16 14:35:18,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274142378] [2022-02-16 14:35:18,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:35:18,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:35:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:35:18,340 INFO L87 Difference]: Start difference. First operand 436 states and 567 transitions. Second operand has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:19,824 INFO L93 Difference]: Finished difference Result 635 states and 846 transitions. [2022-02-16 14:35:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:35:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:19,826 INFO L225 Difference]: With dead ends: 635 [2022-02-16 14:35:19,826 INFO L226 Difference]: Without dead ends: 618 [2022-02-16 14:35:19,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=446, Invalid=5560, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:35:19,828 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:19,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 291 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1031 Invalid, 0 Unknown, 188 Unchecked, 0.4s Time] [2022-02-16 14:35:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-02-16 14:35:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 431. [2022-02-16 14:35:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.302325581395349) internal successors, (560), 430 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 560 transitions. [2022-02-16 14:35:19,835 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 560 transitions. Word has length 39 [2022-02-16 14:35:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:19,835 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 560 transitions. [2022-02-16 14:35:19,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 560 transitions. [2022-02-16 14:35:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:19,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:19,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:19,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-16 14:35:20,051 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1601342863, now seen corresponding path program 20 times [2022-02-16 14:35:20,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:20,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108500041] [2022-02-16 14:35:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:20,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:20,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108500041] [2022-02-16 14:35:20,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108500041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:20,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683897109] [2022-02-16 14:35:20,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:20,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:20,712 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) [2022-02-16 14:35:20,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:35:20,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:20,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:35:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:21,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:21,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:21,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:22,918 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:22,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:23,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683897109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:23,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:23,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 60 [2022-02-16 14:35:23,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96082940] [2022-02-16 14:35:23,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:23,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-16 14:35:23,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-16 14:35:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3412, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:35:23,037 INFO L87 Difference]: Start difference. First operand 431 states and 560 transitions. Second operand has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:24,640 INFO L93 Difference]: Finished difference Result 614 states and 831 transitions. [2022-02-16 14:35:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:35:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:24,642 INFO L225 Difference]: With dead ends: 614 [2022-02-16 14:35:24,643 INFO L226 Difference]: Without dead ends: 596 [2022-02-16 14:35:24,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=467, Invalid=6339, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:35:24,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:24,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 352 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1263 Invalid, 0 Unknown, 286 Unchecked, 0.5s Time] [2022-02-16 14:35:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-02-16 14:35:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 427. [2022-02-16 14:35:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.3028169014084507) internal successors, (555), 426 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 555 transitions. [2022-02-16 14:35:24,651 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 555 transitions. Word has length 39 [2022-02-16 14:35:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:24,651 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 555 transitions. [2022-02-16 14:35:24,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 555 transitions. [2022-02-16 14:35:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:24,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:24,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:24,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-16 14:35:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:24,859 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 47187465, now seen corresponding path program 21 times [2022-02-16 14:35:24,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:24,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456240030] [2022-02-16 14:35:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:24,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:25,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:25,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456240030] [2022-02-16 14:35:25,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456240030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:25,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417055852] [2022-02-16 14:35:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:25,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:25,535 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) [2022-02-16 14:35:25,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:35:25,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:35:25,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:25,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-16 14:35:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:26,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:35:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:26,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:28,302 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:28,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 72 [2022-02-16 14:35:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:28,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417055852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:28,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:28,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 68 [2022-02-16 14:35:28,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178117613] [2022-02-16 14:35:28,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:28,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-16 14:35:28,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-16 14:35:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4372, Unknown=0, NotChecked=0, Total=4692 [2022-02-16 14:35:28,431 INFO L87 Difference]: Start difference. First operand 427 states and 555 transitions. Second operand has 69 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 68 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:29,588 INFO L93 Difference]: Finished difference Result 510 states and 675 transitions. [2022-02-16 14:35:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:35:29,589 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 68 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:29,590 INFO L225 Difference]: With dead ends: 510 [2022-02-16 14:35:29,590 INFO L226 Difference]: Without dead ends: 491 [2022-02-16 14:35:29,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=462, Invalid=6678, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:35:29,591 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:29,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 313 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1028 Invalid, 0 Unknown, 426 Unchecked, 0.4s Time] [2022-02-16 14:35:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-02-16 14:35:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2022-02-16 14:35:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.3018867924528301) internal successors, (552), 424 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 552 transitions. [2022-02-16 14:35:29,596 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 552 transitions. Word has length 39 [2022-02-16 14:35:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:29,596 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 552 transitions. [2022-02-16 14:35:29,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 68 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 552 transitions. [2022-02-16 14:35:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:29,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:29,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:29,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:29,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:29,799 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash -923903561, now seen corresponding path program 22 times [2022-02-16 14:35:29,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:29,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611627600] [2022-02-16 14:35:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:29,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:30,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:30,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611627600] [2022-02-16 14:35:30,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611627600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:30,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320677722] [2022-02-16 14:35:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:35:30,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:30,392 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) [2022-02-16 14:35:30,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:35:30,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:35:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:30,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:35:30,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:30,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:30,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:30,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:31,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:32,385 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:32,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:32,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320677722] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:32,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:32,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 55 [2022-02-16 14:35:32,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818431634] [2022-02-16 14:35:32,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:32,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:35:32,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:35:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2844, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:35:32,501 INFO L87 Difference]: Start difference. First operand 425 states and 552 transitions. Second operand has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:34,667 INFO L93 Difference]: Finished difference Result 634 states and 840 transitions. [2022-02-16 14:35:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:35:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:34,670 INFO L225 Difference]: With dead ends: 634 [2022-02-16 14:35:34,670 INFO L226 Difference]: Without dead ends: 622 [2022-02-16 14:35:34,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=618, Invalid=6864, Unknown=0, NotChecked=0, Total=7482 [2022-02-16 14:35:34,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:34,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 295 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1634 Invalid, 0 Unknown, 201 Unchecked, 0.6s Time] [2022-02-16 14:35:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-02-16 14:35:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 440. [2022-02-16 14:35:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.2984054669703873) internal successors, (570), 439 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 570 transitions. [2022-02-16 14:35:34,679 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 570 transitions. Word has length 39 [2022-02-16 14:35:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 570 transitions. [2022-02-16 14:35:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 570 transitions. [2022-02-16 14:35:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:34,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:34,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:34,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:34,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-16 14:35:34,902 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1398382213, now seen corresponding path program 23 times [2022-02-16 14:35:34,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:34,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631323984] [2022-02-16 14:35:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:34,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:35,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:35,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631323984] [2022-02-16 14:35:35,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631323984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:35,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632362978] [2022-02-16 14:35:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:35:35,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:35,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:35,531 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) [2022-02-16 14:35:35,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:35:35,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:35:35,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:35,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:35:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:36,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:35:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:36,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:37,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:37,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 68 [2022-02-16 14:35:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:37,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632362978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:37,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:37,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 58 [2022-02-16 14:35:37,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523867801] [2022-02-16 14:35:37,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-16 14:35:37,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-16 14:35:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3171, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:35:37,788 INFO L87 Difference]: Start difference. First operand 440 states and 570 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:40,054 INFO L93 Difference]: Finished difference Result 599 states and 791 transitions. [2022-02-16 14:35:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:35:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:40,056 INFO L225 Difference]: With dead ends: 599 [2022-02-16 14:35:40,056 INFO L226 Difference]: Without dead ends: 585 [2022-02-16 14:35:40,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=651, Invalid=7721, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:35:40,057 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:40,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 289 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1573 Invalid, 0 Unknown, 276 Unchecked, 0.6s Time] [2022-02-16 14:35:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-16 14:35:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 431. [2022-02-16 14:35:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.302325581395349) internal successors, (560), 430 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 560 transitions. [2022-02-16 14:35:40,063 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 560 transitions. Word has length 39 [2022-02-16 14:35:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:40,064 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 560 transitions. [2022-02-16 14:35:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 560 transitions. [2022-02-16 14:35:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:40,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:40,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:40,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:40,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 14:35:40,275 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1378102769, now seen corresponding path program 24 times [2022-02-16 14:35:40,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:40,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265579427] [2022-02-16 14:35:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:40,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:40,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:40,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265579427] [2022-02-16 14:35:40,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265579427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:40,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731303292] [2022-02-16 14:35:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:35:40,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:40,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:40,865 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) [2022-02-16 14:35:40,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:35:40,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:35:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:40,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:35:40,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:41,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:35:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:41,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:42,882 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:42,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:42,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731303292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:42,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:42,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 55 [2022-02-16 14:35:42,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300508565] [2022-02-16 14:35:42,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:35:42,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:35:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2850, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:35:42,974 INFO L87 Difference]: Start difference. First operand 431 states and 560 transitions. Second operand has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:44,816 INFO L93 Difference]: Finished difference Result 539 states and 713 transitions. [2022-02-16 14:35:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:35:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:44,818 INFO L225 Difference]: With dead ends: 539 [2022-02-16 14:35:44,818 INFO L226 Difference]: Without dead ends: 527 [2022-02-16 14:35:44,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=498, Invalid=6144, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:35:44,819 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:44,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 344 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1269 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-02-16 14:35:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-02-16 14:35:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 444. [2022-02-16 14:35:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.3024830699774266) internal successors, (577), 443 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 577 transitions. [2022-02-16 14:35:44,825 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 577 transitions. Word has length 39 [2022-02-16 14:35:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:44,825 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 577 transitions. [2022-02-16 14:35:44,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 577 transitions. [2022-02-16 14:35:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:44,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:44,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:44,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 14:35:45,043 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 903624117, now seen corresponding path program 25 times [2022-02-16 14:35:45,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:45,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990981034] [2022-02-16 14:35:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:45,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:45,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:45,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990981034] [2022-02-16 14:35:45,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990981034] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:45,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765717497] [2022-02-16 14:35:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:35:45,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:45,668 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) [2022-02-16 14:35:45,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:35:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:45,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:35:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:46,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:46,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:46,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:47,687 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:47,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:47,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765717497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:47,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:47,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 55 [2022-02-16 14:35:47,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297053792] [2022-02-16 14:35:47,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:47,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:35:47,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:35:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2844, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:35:47,804 INFO L87 Difference]: Start difference. First operand 444 states and 577 transitions. Second operand has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:49,835 INFO L93 Difference]: Finished difference Result 574 states and 768 transitions. [2022-02-16 14:35:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:35:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:49,836 INFO L225 Difference]: With dead ends: 574 [2022-02-16 14:35:49,836 INFO L226 Difference]: Without dead ends: 557 [2022-02-16 14:35:49,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=541, Invalid=6599, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:35:49,837 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:49,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 288 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1327 Invalid, 0 Unknown, 513 Unchecked, 0.5s Time] [2022-02-16 14:35:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-02-16 14:35:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 439. [2022-02-16 14:35:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.3013698630136987) internal successors, (570), 438 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 570 transitions. [2022-02-16 14:35:49,844 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 570 transitions. Word has length 39 [2022-02-16 14:35:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 570 transitions. [2022-02-16 14:35:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 570 transitions. [2022-02-16 14:35:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:49,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:49,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:49,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:50,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 14:35:50,067 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash -574332555, now seen corresponding path program 26 times [2022-02-16 14:35:50,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:50,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991217944] [2022-02-16 14:35:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:50,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:50,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:50,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991217944] [2022-02-16 14:35:50,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991217944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:50,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098113525] [2022-02-16 14:35:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:35:50,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:50,676 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) [2022-02-16 14:35:50,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:35:50,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:35:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:50,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:35:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:51,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:51,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:52,879 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:52,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:53,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098113525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:53,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:53,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 60 [2022-02-16 14:35:53,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912552086] [2022-02-16 14:35:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-16 14:35:53,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-16 14:35:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3409, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:35:53,004 INFO L87 Difference]: Start difference. First operand 439 states and 570 transitions. Second operand has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:35:54,906 INFO L93 Difference]: Finished difference Result 568 states and 760 transitions. [2022-02-16 14:35:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 14:35:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:35:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:35:54,907 INFO L225 Difference]: With dead ends: 568 [2022-02-16 14:35:54,907 INFO L226 Difference]: Without dead ends: 550 [2022-02-16 14:35:54,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=528, Invalid=7128, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:35:54,908 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:35:54,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 280 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1198 Invalid, 0 Unknown, 289 Unchecked, 0.5s Time] [2022-02-16 14:35:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-16 14:35:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 435. [2022-02-16 14:35:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.3018433179723503) internal successors, (565), 434 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 565 transitions. [2022-02-16 14:35:54,915 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 565 transitions. Word has length 39 [2022-02-16 14:35:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:35:54,915 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 565 transitions. [2022-02-16 14:35:54,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:35:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 565 transitions. [2022-02-16 14:35:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:35:54,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:35:54,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:35:54,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:35:55,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:55,139 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:35:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:35:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2128487953, now seen corresponding path program 27 times [2022-02-16 14:35:55,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:35:55,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964055142] [2022-02-16 14:35:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:35:55,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:35:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:35:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:55,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:35:55,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964055142] [2022-02-16 14:35:55,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964055142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:35:55,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281671341] [2022-02-16 14:35:55,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:35:55,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:35:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:35:55,873 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) [2022-02-16 14:35:55,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:35:55,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:35:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:35:55,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-16 14:35:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:35:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:35:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:35:56,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:35:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:57,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:35:58,139 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:35:58,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:35:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:35:58,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281671341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:35:58,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:35:58,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 61 [2022-02-16 14:35:58,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331624098] [2022-02-16 14:35:58,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:35:58,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-16 14:35:58,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:35:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-16 14:35:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3517, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:35:58,241 INFO L87 Difference]: Start difference. First operand 435 states and 565 transitions. Second operand has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:00,868 INFO L93 Difference]: Finished difference Result 696 states and 913 transitions. [2022-02-16 14:36:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:36:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:00,869 INFO L225 Difference]: With dead ends: 696 [2022-02-16 14:36:00,869 INFO L226 Difference]: Without dead ends: 677 [2022-02-16 14:36:00,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=663, Invalid=8457, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:36:00,871 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:00,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 290 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1689 Invalid, 0 Unknown, 135 Unchecked, 0.7s Time] [2022-02-16 14:36:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-16 14:36:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 433. [2022-02-16 14:36:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.3009259259259258) internal successors, (562), 432 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 562 transitions. [2022-02-16 14:36:00,886 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 562 transitions. Word has length 39 [2022-02-16 14:36:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:00,886 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 562 transitions. [2022-02-16 14:36:00,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 61 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 562 transitions. [2022-02-16 14:36:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:00,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:00,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:00,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:01,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:01,111 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1378458707, now seen corresponding path program 28 times [2022-02-16 14:36:01,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:01,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566285980] [2022-02-16 14:36:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:01,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:01,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:01,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566285980] [2022-02-16 14:36:01,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566285980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:01,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813581623] [2022-02-16 14:36:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:01,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:01,757 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) [2022-02-16 14:36:01,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:36:01,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:01,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:01,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:02,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:02,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:02,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:03,842 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:03,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:03,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813581623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:03,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:03,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 58 [2022-02-16 14:36:03,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752153811] [2022-02-16 14:36:03,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-16 14:36:03,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-16 14:36:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:36:03,956 INFO L87 Difference]: Start difference. First operand 433 states and 562 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:05,907 INFO L93 Difference]: Finished difference Result 587 states and 768 transitions. [2022-02-16 14:36:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:36:05,907 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:05,908 INFO L225 Difference]: With dead ends: 587 [2022-02-16 14:36:05,908 INFO L226 Difference]: Without dead ends: 575 [2022-02-16 14:36:05,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=536, Invalid=7120, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:36:05,910 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:05,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 307 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1246 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-02-16 14:36:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-16 14:36:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 444. [2022-02-16 14:36:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.3002257336343115) internal successors, (576), 443 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 576 transitions. [2022-02-16 14:36:05,916 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 576 transitions. Word has length 39 [2022-02-16 14:36:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:05,916 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 576 transitions. [2022-02-16 14:36:05,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 576 transitions. [2022-02-16 14:36:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:05,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:05,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:05,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-16 14:36:06,139 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 903980055, now seen corresponding path program 29 times [2022-02-16 14:36:06,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:06,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886494071] [2022-02-16 14:36:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:06,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:06,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886494071] [2022-02-16 14:36:06,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886494071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:06,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831979703] [2022-02-16 14:36:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:36:06,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:06,783 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) [2022-02-16 14:36:06,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:36:06,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:36:06,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:06,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:36:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:07,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:36:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:07,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:08,907 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:08,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:09,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831979703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:09,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:09,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 58 [2022-02-16 14:36:09,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370214892] [2022-02-16 14:36:09,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:09,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-16 14:36:09,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-16 14:36:09,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3172, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:36:09,011 INFO L87 Difference]: Start difference. First operand 444 states and 576 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:10,947 INFO L93 Difference]: Finished difference Result 608 states and 799 transitions. [2022-02-16 14:36:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:36:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:10,949 INFO L225 Difference]: With dead ends: 608 [2022-02-16 14:36:10,949 INFO L226 Difference]: Without dead ends: 594 [2022-02-16 14:36:10,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=556, Invalid=7100, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:36:10,950 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:10,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 234 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1192 Invalid, 0 Unknown, 302 Unchecked, 0.5s Time] [2022-02-16 14:36:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-16 14:36:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 450. [2022-02-16 14:36:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2984409799554566) internal successors, (583), 449 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 583 transitions. [2022-02-16 14:36:10,955 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 583 transitions. Word has length 39 [2022-02-16 14:36:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:10,955 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 583 transitions. [2022-02-16 14:36:10,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 583 transitions. [2022-02-16 14:36:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:10,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:10,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:10,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:11,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:11,156 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:11,157 INFO L85 PathProgramCache]: Analyzing trace with hash -573976617, now seen corresponding path program 30 times [2022-02-16 14:36:11,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:11,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845267265] [2022-02-16 14:36:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:11,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:11,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:11,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845267265] [2022-02-16 14:36:11,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845267265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:11,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136529231] [2022-02-16 14:36:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:36:11,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:11,920 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) [2022-02-16 14:36:11,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:36:11,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:36:11,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:11,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:12,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:36:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:13,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:14,515 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:14,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 69 [2022-02-16 14:36:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:14,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136529231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:14,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:14,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2022-02-16 14:36:14,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204510617] [2022-02-16 14:36:14,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:14,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-16 14:36:14,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-16 14:36:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4258, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 14:36:14,628 INFO L87 Difference]: Start difference. First operand 450 states and 583 transitions. Second operand has 68 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 67 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:16,931 INFO L93 Difference]: Finished difference Result 603 states and 792 transitions. [2022-02-16 14:36:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:36:16,932 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 67 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:16,933 INFO L225 Difference]: With dead ends: 603 [2022-02-16 14:36:16,933 INFO L226 Difference]: Without dead ends: 583 [2022-02-16 14:36:16,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=624, Invalid=9078, Unknown=0, NotChecked=0, Total=9702 [2022-02-16 14:36:16,934 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:16,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 294 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1553 Invalid, 0 Unknown, 401 Unchecked, 0.6s Time] [2022-02-16 14:36:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-16 14:36:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 444. [2022-02-16 14:36:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.3002257336343115) internal successors, (576), 443 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 576 transitions. [2022-02-16 14:36:16,939 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 576 transitions. Word has length 39 [2022-02-16 14:36:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:16,939 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 576 transitions. [2022-02-16 14:36:16,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 67 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 576 transitions. [2022-02-16 14:36:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:16,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:16,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:16,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:17,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:17,155 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1258086417, now seen corresponding path program 31 times [2022-02-16 14:36:17,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:17,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573155772] [2022-02-16 14:36:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:17,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:17,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:17,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573155772] [2022-02-16 14:36:17,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573155772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:17,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552650994] [2022-02-16 14:36:17,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:36:17,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:17,811 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) [2022-02-16 14:36:17,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:36:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:17,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:18,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:18,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:18,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:19,944 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:19,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:20,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552650994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:20,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:20,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 58 [2022-02-16 14:36:20,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609949590] [2022-02-16 14:36:20,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:20,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-16 14:36:20,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-16 14:36:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:36:20,055 INFO L87 Difference]: Start difference. First operand 444 states and 576 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:22,292 INFO L93 Difference]: Finished difference Result 599 states and 780 transitions. [2022-02-16 14:36:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-16 14:36:22,293 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:22,294 INFO L225 Difference]: With dead ends: 599 [2022-02-16 14:36:22,294 INFO L226 Difference]: Without dead ends: 582 [2022-02-16 14:36:22,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=586, Invalid=7424, Unknown=0, NotChecked=0, Total=8010 [2022-02-16 14:36:22,295 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:22,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 330 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1533 Invalid, 0 Unknown, 260 Unchecked, 0.6s Time] [2022-02-16 14:36:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-16 14:36:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 439. [2022-02-16 14:36:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.3013698630136987) internal successors, (570), 438 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 570 transitions. [2022-02-16 14:36:22,300 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 570 transitions. Word has length 39 [2022-02-16 14:36:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:22,300 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 570 transitions. [2022-02-16 14:36:22,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 570 transitions. [2022-02-16 14:36:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:22,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:22,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:22,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:22,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-16 14:36:22,502 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2006623633, now seen corresponding path program 32 times [2022-02-16 14:36:22,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:22,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585255079] [2022-02-16 14:36:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:23,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:23,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585255079] [2022-02-16 14:36:23,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585255079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:23,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143365042] [2022-02-16 14:36:23,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:36:23,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:23,188 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) [2022-02-16 14:36:23,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:36:23,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:36:23,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:23,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:24,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:24,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:25,421 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:25,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:25,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143365042] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:25,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:25,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 60 [2022-02-16 14:36:25,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203443359] [2022-02-16 14:36:25,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:25,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-16 14:36:25,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-16 14:36:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3409, Unknown=0, NotChecked=0, Total=3660 [2022-02-16 14:36:25,507 INFO L87 Difference]: Start difference. First operand 439 states and 570 transitions. Second operand has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:27,390 INFO L93 Difference]: Finished difference Result 594 states and 781 transitions. [2022-02-16 14:36:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:36:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:27,391 INFO L225 Difference]: With dead ends: 594 [2022-02-16 14:36:27,391 INFO L226 Difference]: Without dead ends: 575 [2022-02-16 14:36:27,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=544, Invalid=7288, Unknown=0, NotChecked=0, Total=7832 [2022-02-16 14:36:27,392 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:27,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 209 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1022 Invalid, 0 Unknown, 484 Unchecked, 0.4s Time] [2022-02-16 14:36:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-16 14:36:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 437. [2022-02-16 14:36:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.3004587155963303) internal successors, (567), 436 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 567 transitions. [2022-02-16 14:36:27,397 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 567 transitions. Word has length 39 [2022-02-16 14:36:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 567 transitions. [2022-02-16 14:36:27,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 60 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 567 transitions. [2022-02-16 14:36:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:27,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:27,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:27,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:27,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 14:36:27,600 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash 964855471, now seen corresponding path program 33 times [2022-02-16 14:36:27,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:27,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751950627] [2022-02-16 14:36:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:27,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:28,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:28,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751950627] [2022-02-16 14:36:28,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751950627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:28,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665595834] [2022-02-16 14:36:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:36:28,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:28,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:28,274 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) [2022-02-16 14:36:28,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:36:28,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:36:28,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:28,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:29,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:36:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:29,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:30,904 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:30,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 69 [2022-02-16 14:36:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:31,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665595834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:31,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:31,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2022-02-16 14:36:31,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873534711] [2022-02-16 14:36:31,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:31,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-16 14:36:31,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-16 14:36:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=4256, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 14:36:31,028 INFO L87 Difference]: Start difference. First operand 437 states and 567 transitions. Second operand has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 67 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:33,195 INFO L93 Difference]: Finished difference Result 596 states and 776 transitions. [2022-02-16 14:36:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:36:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 67 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:33,196 INFO L225 Difference]: With dead ends: 596 [2022-02-16 14:36:33,196 INFO L226 Difference]: Without dead ends: 575 [2022-02-16 14:36:33,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=624, Invalid=8496, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:36:33,198 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:33,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 226 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1285 Invalid, 0 Unknown, 192 Unchecked, 0.5s Time] [2022-02-16 14:36:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-16 14:36:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 435. [2022-02-16 14:36:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.2995391705069124) internal successors, (564), 434 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 564 transitions. [2022-02-16 14:36:33,203 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 564 transitions. Word has length 39 [2022-02-16 14:36:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:33,203 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 564 transitions. [2022-02-16 14:36:33,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 67 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 564 transitions. [2022-02-16 14:36:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:33,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:33,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:33,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:33,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 14:36:33,404 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -445549359, now seen corresponding path program 34 times [2022-02-16 14:36:33,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:33,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966113724] [2022-02-16 14:36:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:33,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:33,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:33,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966113724] [2022-02-16 14:36:33,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966113724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:33,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356232323] [2022-02-16 14:36:33,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:33,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:33,878 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:33,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 14:36:33,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:33,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:34,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:34,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:34,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:35,408 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:35,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:35,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356232323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:35,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:35,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2022-02-16 14:36:35,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983069059] [2022-02-16 14:36:35,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-16 14:36:35,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-16 14:36:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:36:35,477 INFO L87 Difference]: Start difference. First operand 435 states and 564 transitions. Second operand has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:37,368 INFO L93 Difference]: Finished difference Result 588 states and 768 transitions. [2022-02-16 14:36:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-16 14:36:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:37,370 INFO L225 Difference]: With dead ends: 588 [2022-02-16 14:36:37,370 INFO L226 Difference]: Without dead ends: 564 [2022-02-16 14:36:37,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:36:37,371 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:37,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 199 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1116 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-02-16 14:36:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-16 14:36:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 462. [2022-02-16 14:36:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.2906724511930585) internal successors, (595), 461 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 595 transitions. [2022-02-16 14:36:37,375 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 595 transitions. Word has length 39 [2022-02-16 14:36:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:37,375 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 595 transitions. [2022-02-16 14:36:37,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 595 transitions. [2022-02-16 14:36:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:37,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:37,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:37,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:37,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:37,578 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -920028011, now seen corresponding path program 35 times [2022-02-16 14:36:37,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:37,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468260234] [2022-02-16 14:36:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:37,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:38,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:38,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468260234] [2022-02-16 14:36:38,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468260234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:38,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134453612] [2022-02-16 14:36:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:36:38,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:38,126 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:38,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 14:36:38,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:36:38,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:38,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-16 14:36:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:38,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:38,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:39,930 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:39,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 69 [2022-02-16 14:36:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:40,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134453612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:40,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:40,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 56 [2022-02-16 14:36:40,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344118804] [2022-02-16 14:36:40,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:40,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-16 14:36:40,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-16 14:36:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2923, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:36:40,069 INFO L87 Difference]: Start difference. First operand 462 states and 595 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:42,347 INFO L93 Difference]: Finished difference Result 620 states and 802 transitions. [2022-02-16 14:36:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:36:42,347 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:42,348 INFO L225 Difference]: With dead ends: 620 [2022-02-16 14:36:42,348 INFO L226 Difference]: Without dead ends: 592 [2022-02-16 14:36:42,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=718, Invalid=7654, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:36:42,352 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 249 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-16 14:36:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-16 14:36:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 453. [2022-02-16 14:36:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2920353982300885) internal successors, (584), 452 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 584 transitions. [2022-02-16 14:36:42,358 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 584 transitions. Word has length 39 [2022-02-16 14:36:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:42,358 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 584 transitions. [2022-02-16 14:36:42,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 584 transitions. [2022-02-16 14:36:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:42,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:42,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:42,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:42,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 14:36:42,559 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1856456971, now seen corresponding path program 36 times [2022-02-16 14:36:42,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:42,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734845081] [2022-02-16 14:36:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:42,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:43,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734845081] [2022-02-16 14:36:43,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734845081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595930913] [2022-02-16 14:36:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:36:43,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:43,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:43,169 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:43,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 14:36:43,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:36:43,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:43,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2022-02-16 14:36:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:43,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:43,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:43,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:36:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:43,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:44,741 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:44,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:44,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595930913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:44,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:44,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-02-16 14:36:44,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787297344] [2022-02-16 14:36:44,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:44,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-16 14:36:44,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-16 14:36:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:36:44,827 INFO L87 Difference]: Start difference. First operand 453 states and 584 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:46,535 INFO L93 Difference]: Finished difference Result 603 states and 775 transitions. [2022-02-16 14:36:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 14:36:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:46,537 INFO L225 Difference]: With dead ends: 603 [2022-02-16 14:36:46,537 INFO L226 Difference]: Without dead ends: 579 [2022-02-16 14:36:46,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=511, Invalid=5969, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:36:46,538 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:46,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 297 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 965 Invalid, 0 Unknown, 300 Unchecked, 0.4s Time] [2022-02-16 14:36:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-02-16 14:36:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2022-02-16 14:36:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.29247311827957) internal successors, (601), 465 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 601 transitions. [2022-02-16 14:36:46,543 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 601 transitions. Word has length 39 [2022-02-16 14:36:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:46,543 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 601 transitions. [2022-02-16 14:36:46,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 601 transitions. [2022-02-16 14:36:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:46,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:46,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:46,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:46,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 14:36:46,744 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1381978319, now seen corresponding path program 37 times [2022-02-16 14:36:46,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:46,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494743129] [2022-02-16 14:36:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:46,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:47,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494743129] [2022-02-16 14:36:47,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494743129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221297854] [2022-02-16 14:36:47,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:36:47,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:47,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:47,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 14:36:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:47,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:47,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:47,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:47,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:48,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:48,983 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:48,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:49,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221297854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:49,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:49,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-02-16 14:36:49,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502717999] [2022-02-16 14:36:49,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:49,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-16 14:36:49,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-16 14:36:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:36:49,060 INFO L87 Difference]: Start difference. First operand 466 states and 601 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:50,266 INFO L93 Difference]: Finished difference Result 542 states and 713 transitions. [2022-02-16 14:36:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-16 14:36:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:50,268 INFO L225 Difference]: With dead ends: 542 [2022-02-16 14:36:50,268 INFO L226 Difference]: Without dead ends: 528 [2022-02-16 14:36:50,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=413, Invalid=4557, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 14:36:50,268 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:50,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 221 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 999 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-02-16 14:36:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-16 14:36:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 473. [2022-02-16 14:36:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.2923728813559323) internal successors, (610), 472 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 610 transitions. [2022-02-16 14:36:50,273 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 610 transitions. Word has length 39 [2022-02-16 14:36:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:50,273 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 610 transitions. [2022-02-16 14:36:50,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 610 transitions. [2022-02-16 14:36:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:50,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:50,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:50,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-16 14:36:50,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:50,474 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -95978353, now seen corresponding path program 38 times [2022-02-16 14:36:50,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:50,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117941552] [2022-02-16 14:36:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:50,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:51,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:51,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117941552] [2022-02-16 14:36:51,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117941552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:51,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649222768] [2022-02-16 14:36:51,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:36:51,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:51,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:51,024 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:51,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 14:36:51,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:36:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:51,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:51,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:51,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:51,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:52,767 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:52,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:52,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649222768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:52,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:52,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 52 [2022-02-16 14:36:52,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503905653] [2022-02-16 14:36:52,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:52,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-16 14:36:52,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-16 14:36:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2542, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:36:52,861 INFO L87 Difference]: Start difference. First operand 473 states and 610 transitions. Second operand has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 52 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:53,990 INFO L93 Difference]: Finished difference Result 527 states and 686 transitions. [2022-02-16 14:36:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:36:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 52 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:36:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:53,991 INFO L225 Difference]: With dead ends: 527 [2022-02-16 14:36:53,991 INFO L226 Difference]: Without dead ends: 509 [2022-02-16 14:36:53,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=375, Invalid=4595, Unknown=0, NotChecked=0, Total=4970 [2022-02-16 14:36:53,992 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:53,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 232 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1077 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-02-16 14:36:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-16 14:36:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 469. [2022-02-16 14:36:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.2927350427350428) internal successors, (605), 468 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 605 transitions. [2022-02-16 14:36:53,997 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 605 transitions. Word has length 39 [2022-02-16 14:36:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 605 transitions. [2022-02-16 14:36:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 52 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 605 transitions. [2022-02-16 14:36:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:53,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:53,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:54,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:54,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-16 14:36:54,198 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1376075187, now seen corresponding path program 39 times [2022-02-16 14:36:54,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:54,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064236981] [2022-02-16 14:36:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:54,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:54,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:54,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064236981] [2022-02-16 14:36:54,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064236981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:54,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030989258] [2022-02-16 14:36:54,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:36:54,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:54,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:54,781 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:54,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 14:36:54,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:36:54,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:54,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-16 14:36:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:36:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:36:55,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:36:55,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:36:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:55,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:36:56,401 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:36:56,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:36:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:56,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030989258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:36:56,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:36:56,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 49 [2022-02-16 14:36:56,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697619329] [2022-02-16 14:36:56,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:36:56,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-16 14:36:56,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:36:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-16 14:36:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2022-02-16 14:36:56,492 INFO L87 Difference]: Start difference. First operand 469 states and 605 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 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) [2022-02-16 14:36:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:36:59,065 INFO L93 Difference]: Finished difference Result 708 states and 920 transitions. [2022-02-16 14:36:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:36:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 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 39 [2022-02-16 14:36:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:36:59,067 INFO L225 Difference]: With dead ends: 708 [2022-02-16 14:36:59,067 INFO L226 Difference]: Without dead ends: 674 [2022-02-16 14:36:59,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=701, Invalid=7671, Unknown=0, NotChecked=0, Total=8372 [2022-02-16 14:36:59,068 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:36:59,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 188 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1255 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-02-16 14:36:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-16 14:36:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 464. [2022-02-16 14:36:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.2915766738660908) internal successors, (598), 463 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:36:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 598 transitions. [2022-02-16 14:36:59,075 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 598 transitions. Word has length 39 [2022-02-16 14:36:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:36:59,075 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 598 transitions. [2022-02-16 14:36:59,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 49 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) [2022-02-16 14:36:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 598 transitions. [2022-02-16 14:36:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-16 14:36:59,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:36:59,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:36:59,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 14:36:59,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:59,283 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:36:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:36:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1650133751, now seen corresponding path program 40 times [2022-02-16 14:36:59,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:36:59,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502156091] [2022-02-16 14:36:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:36:59,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:36:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:36:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:36:59,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:36:59,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502156091] [2022-02-16 14:36:59,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502156091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:36:59,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792220798] [2022-02-16 14:36:59,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:36:59,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:36:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:36:59,821 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:36:59,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 14:36:59,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:36:59,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:36:59,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-16 14:36:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:37:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:37:00,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-02-16 14:37:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:00,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:01,718 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:37:01,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 66 [2022-02-16 14:37:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:01,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792220798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:01,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:01,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-02-16 14:37:01,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307551214] [2022-02-16 14:37:01,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:01,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-16 14:37:01,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-16 14:37:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:37:01,798 INFO L87 Difference]: Start difference. First operand 464 states and 598 transitions. Second operand has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:02,814 INFO L93 Difference]: Finished difference Result 527 states and 693 transitions. [2022-02-16 14:37:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:37:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-02-16 14:37:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:02,815 INFO L225 Difference]: With dead ends: 527 [2022-02-16 14:37:02,815 INFO L226 Difference]: Without dead ends: 508 [2022-02-16 14:37:02,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=368, Invalid=4744, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:37:02,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:02,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 153 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 614 Invalid, 0 Unknown, 188 Unchecked, 0.3s Time] [2022-02-16 14:37:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-02-16 14:37:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 461. [2022-02-16 14:37:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.291304347826087) internal successors, (594), 460 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 594 transitions. [2022-02-16 14:37:02,821 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 594 transitions. Word has length 39 [2022-02-16 14:37:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:02,821 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 594 transitions. [2022-02-16 14:37:02,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 53 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 594 transitions. [2022-02-16 14:37:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:37:02,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:02,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:02,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:03,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:03,023 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash 110863813, now seen corresponding path program 41 times [2022-02-16 14:37:03,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:03,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136446627] [2022-02-16 14:37:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:03,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:03,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:03,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136446627] [2022-02-16 14:37:03,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136446627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:03,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205978910] [2022-02-16 14:37:03,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:37:03,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:03,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:03,119 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:03,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 14:37:03,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:37:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-16 14:37:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:03,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 14:37:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:03,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:03,336 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-16 14:37:03,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-02-16 14:37:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:03,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205978910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:03,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:03,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-16 14:37:03,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618887916] [2022-02-16 14:37:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 14:37:03,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 14:37:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-02-16 14:37:03,364 INFO L87 Difference]: Start difference. First operand 461 states and 594 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:03,790 INFO L93 Difference]: Finished difference Result 818 states and 1051 transitions. [2022-02-16 14:37:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:37:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:37:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:03,791 INFO L225 Difference]: With dead ends: 818 [2022-02-16 14:37:03,791 INFO L226 Difference]: Without dead ends: 818 [2022-02-16 14:37:03,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:37:03,792 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 348 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:03,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 451 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:37:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-16 14:37:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 329. [2022-02-16 14:37:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.2682926829268293) internal successors, (416), 328 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 416 transitions. [2022-02-16 14:37:03,797 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 416 transitions. Word has length 43 [2022-02-16 14:37:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:03,797 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 416 transitions. [2022-02-16 14:37:03,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 416 transitions. [2022-02-16 14:37:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-16 14:37:03,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:03,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:03,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-16 14:37:03,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-16 14:37:03,998 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 845963017, now seen corresponding path program 42 times [2022-02-16 14:37:03,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:03,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327696177] [2022-02-16 14:37:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:03,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:04,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:04,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327696177] [2022-02-16 14:37:04,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327696177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:04,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204543475] [2022-02-16 14:37:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:04,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:04,032 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 14:37:04,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:37:04,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:37:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:04,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:04,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204543475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:04,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:04,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-16 14:37:04,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492097598] [2022-02-16 14:37:04,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:04,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 14:37:04,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 14:37:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:37:04,193 INFO L87 Difference]: Start difference. First operand 329 states and 416 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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) [2022-02-16 14:37:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:04,228 INFO L93 Difference]: Finished difference Result 766 states and 979 transitions. [2022-02-16 14:37:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 14:37:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 44 [2022-02-16 14:37:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:04,229 INFO L225 Difference]: With dead ends: 766 [2022-02-16 14:37:04,229 INFO L226 Difference]: Without dead ends: 713 [2022-02-16 14:37:04,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:37:04,230 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 103 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:04,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 105 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:37:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-16 14:37:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 642. [2022-02-16 14:37:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3088923556942278) internal successors, (839), 641 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 839 transitions. [2022-02-16 14:37:04,237 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 839 transitions. Word has length 44 [2022-02-16 14:37:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:04,237 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 839 transitions. [2022-02-16 14:37:04,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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) [2022-02-16 14:37:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 839 transitions. [2022-02-16 14:37:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:04,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:04,239 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:04,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-16 14:37:04,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-16 14:37:04,443 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1512779341, now seen corresponding path program 43 times [2022-02-16 14:37:04,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:04,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144488084] [2022-02-16 14:37:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:05,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:05,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144488084] [2022-02-16 14:37:05,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144488084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:05,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491268121] [2022-02-16 14:37:05,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:37:05,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:05,566 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 14:37:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:05,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:37:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:06,895 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-16 14:37:06,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-02-16 14:37:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:07,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:09,291 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:09,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:37:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:09,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491268121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:09,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:09,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 84 [2022-02-16 14:37:09,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766598842] [2022-02-16 14:37:09,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:09,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-16 14:37:09,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-16 14:37:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=6829, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:37:09,533 INFO L87 Difference]: Start difference. First operand 642 states and 839 transitions. Second operand has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:13,605 INFO L93 Difference]: Finished difference Result 1031 states and 1350 transitions. [2022-02-16 14:37:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 14:37:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:37:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:13,607 INFO L225 Difference]: With dead ends: 1031 [2022-02-16 14:37:13,607 INFO L226 Difference]: Without dead ends: 1027 [2022-02-16 14:37:13,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=663, Invalid=14343, Unknown=0, NotChecked=0, Total=15006 [2022-02-16 14:37:13,608 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 133 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 3434 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:13,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 735 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3434 Invalid, 0 Unknown, 89 Unchecked, 1.4s Time] [2022-02-16 14:37:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-02-16 14:37:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 648. [2022-02-16 14:37:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.3075734157650696) internal successors, (846), 647 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 846 transitions. [2022-02-16 14:37:13,615 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 846 transitions. Word has length 48 [2022-02-16 14:37:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:13,615 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 846 transitions. [2022-02-16 14:37:13,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 846 transitions. [2022-02-16 14:37:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:13,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:13,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:13,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:13,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 14:37:13,817 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash -240434807, now seen corresponding path program 44 times [2022-02-16 14:37:13,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:13,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029548103] [2022-02-16 14:37:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:13,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:14,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:14,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029548103] [2022-02-16 14:37:14,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029548103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:14,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263981898] [2022-02-16 14:37:14,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:37:14,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:14,896 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:14,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 14:37:14,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:37:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:14,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:37:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:16,054 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-16 14:37:16,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-02-16 14:37:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:16,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:18,351 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:18,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:37:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:18,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263981898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:18,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:18,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 79 [2022-02-16 14:37:18,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764347093] [2022-02-16 14:37:18,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:18,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-16 14:37:18,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-16 14:37:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=6023, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:37:18,584 INFO L87 Difference]: Start difference. First operand 648 states and 846 transitions. Second operand has 80 states, 80 states have (on average 1.6375) internal successors, (131), 79 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:22,942 INFO L93 Difference]: Finished difference Result 1119 states and 1448 transitions. [2022-02-16 14:37:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:37:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.6375) internal successors, (131), 79 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:37:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:22,943 INFO L225 Difference]: With dead ends: 1119 [2022-02-16 14:37:22,943 INFO L226 Difference]: Without dead ends: 1107 [2022-02-16 14:37:22,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=694, Invalid=14068, Unknown=0, NotChecked=0, Total=14762 [2022-02-16 14:37:22,945 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 187 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 3915 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 4034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:22,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 776 Invalid, 4034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3915 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-16 14:37:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-02-16 14:37:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 692. [2022-02-16 14:37:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.3024602026049203) internal successors, (900), 691 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 900 transitions. [2022-02-16 14:37:22,954 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 900 transitions. Word has length 48 [2022-02-16 14:37:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:22,954 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 900 transitions. [2022-02-16 14:37:22,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.6375) internal successors, (131), 79 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 900 transitions. [2022-02-16 14:37:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:22,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:22,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:22,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:23,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:23,175 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -714913459, now seen corresponding path program 45 times [2022-02-16 14:37:23,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:23,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423312538] [2022-02-16 14:37:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:23,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:24,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:24,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423312538] [2022-02-16 14:37:24,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423312538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:24,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593751867] [2022-02-16 14:37:24,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:37:24,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:24,211 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 14:37:24,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:37:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:24,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-16 14:37:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:25,533 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:37:25,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:37:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:26,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:28,114 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:28,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 123 [2022-02-16 14:37:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:28,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593751867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:28,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:28,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 29] total 84 [2022-02-16 14:37:28,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230249746] [2022-02-16 14:37:28,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:28,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-16 14:37:28,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-16 14:37:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=6798, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:37:28,294 INFO L87 Difference]: Start difference. First operand 692 states and 900 transitions. Second operand has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:33,310 INFO L93 Difference]: Finished difference Result 1111 states and 1438 transitions. [2022-02-16 14:37:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-16 14:37:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:37:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:33,312 INFO L225 Difference]: With dead ends: 1111 [2022-02-16 14:37:33,312 INFO L226 Difference]: Without dead ends: 1094 [2022-02-16 14:37:33,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4243 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=844, Invalid=16712, Unknown=0, NotChecked=0, Total=17556 [2022-02-16 14:37:33,314 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 218 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:33,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 618 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-16 14:37:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-02-16 14:37:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 677. [2022-02-16 14:37:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.3047337278106508) internal successors, (882), 676 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 882 transitions. [2022-02-16 14:37:33,323 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 882 transitions. Word has length 48 [2022-02-16 14:37:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 882 transitions. [2022-02-16 14:37:33,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 882 transitions. [2022-02-16 14:37:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:33,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:33,324 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:33,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:33,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-16 14:37:33,545 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash -988972023, now seen corresponding path program 46 times [2022-02-16 14:37:33,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:33,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202287338] [2022-02-16 14:37:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:33,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:34,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:34,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202287338] [2022-02-16 14:37:34,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202287338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:34,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102787462] [2022-02-16 14:37:34,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:37:34,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:34,555 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:34,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 14:37:34,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:37:34,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:34,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:37:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:35,876 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-16 14:37:35,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-02-16 14:37:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:36,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:38,116 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:38,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:37:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:38,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102787462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:38,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:38,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 81 [2022-02-16 14:37:38,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644603717] [2022-02-16 14:37:38,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:38,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-16 14:37:38,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-16 14:37:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=6338, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:37:38,263 INFO L87 Difference]: Start difference. First operand 677 states and 882 transitions. Second operand has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:42,402 INFO L93 Difference]: Finished difference Result 1101 states and 1426 transitions. [2022-02-16 14:37:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:37:42,402 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:37:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:42,404 INFO L225 Difference]: With dead ends: 1101 [2022-02-16 14:37:42,404 INFO L226 Difference]: Without dead ends: 1079 [2022-02-16 14:37:42,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=671, Invalid=13849, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:37:42,405 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 3608 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 3838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 3608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:42,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 684 Invalid, 3838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 3608 Invalid, 0 Unknown, 120 Unchecked, 1.5s Time] [2022-02-16 14:37:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-02-16 14:37:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 668. [2022-02-16 14:37:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.3043478260869565) internal successors, (870), 667 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 870 transitions. [2022-02-16 14:37:42,414 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 870 transitions. Word has length 48 [2022-02-16 14:37:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:42,414 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 870 transitions. [2022-02-16 14:37:42,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 870 transitions. [2022-02-16 14:37:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:42,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:42,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:42,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-16 14:37:42,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-16 14:37:42,637 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1564369203, now seen corresponding path program 47 times [2022-02-16 14:37:42,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:42,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713729610] [2022-02-16 14:37:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:42,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:43,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:43,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713729610] [2022-02-16 14:37:43,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713729610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:43,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718382030] [2022-02-16 14:37:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:37:43,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:43,634 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:43,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 14:37:43,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:37:43,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:43,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:37:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:44,825 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:37:44,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:37:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:45,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:47,102 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:47,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:37:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:47,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718382030] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:47,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:47,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 81 [2022-02-16 14:37:47,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853852877] [2022-02-16 14:37:47,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:47,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-16 14:37:47,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-16 14:37:47,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=6338, Unknown=0, NotChecked=0, Total=6642 [2022-02-16 14:37:47,323 INFO L87 Difference]: Start difference. First operand 668 states and 870 transitions. Second operand has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:37:50,655 INFO L93 Difference]: Finished difference Result 1033 states and 1330 transitions. [2022-02-16 14:37:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-16 14:37:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:37:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:37:50,657 INFO L225 Difference]: With dead ends: 1033 [2022-02-16 14:37:50,657 INFO L226 Difference]: Without dead ends: 1009 [2022-02-16 14:37:50,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=593, Invalid=12063, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:37:50,658 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 131 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 3195 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:37:50,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 922 Invalid, 3390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3195 Invalid, 0 Unknown, 108 Unchecked, 1.3s Time] [2022-02-16 14:37:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-16 14:37:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 664. [2022-02-16 14:37:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.3031674208144797) internal successors, (864), 663 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 864 transitions. [2022-02-16 14:37:50,666 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 864 transitions. Word has length 48 [2022-02-16 14:37:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:37:50,667 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 864 transitions. [2022-02-16 14:37:50,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.5975609756097562) internal successors, (131), 81 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:37:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 864 transitions. [2022-02-16 14:37:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:37:50,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:37:50,668 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:37:50,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 14:37:50,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:50,868 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:37:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:37:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2028897511, now seen corresponding path program 48 times [2022-02-16 14:37:50,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:37:50,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370897834] [2022-02-16 14:37:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:37:50,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:37:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:37:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:51,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:37:51,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370897834] [2022-02-16 14:37:51,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370897834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:37:51,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652938701] [2022-02-16 14:37:51,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:37:51,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:37:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:37:51,908 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:37:51,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 14:37:51,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:37:51,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:37:51,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:37:51,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:37:53,201 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:37:53,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:37:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:53,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:37:56,136 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:37:56,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 126 [2022-02-16 14:37:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:37:56,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652938701] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:37:56,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:37:56,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 92 [2022-02-16 14:37:56,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649682582] [2022-02-16 14:37:56,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:37:56,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-16 14:37:56,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:37:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-16 14:37:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=8166, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:37:56,356 INFO L87 Difference]: Start difference. First operand 664 states and 864 transitions. Second operand has 93 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 92 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:01,834 INFO L93 Difference]: Finished difference Result 1083 states and 1404 transitions. [2022-02-16 14:38:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:38:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 92 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:01,836 INFO L225 Difference]: With dead ends: 1083 [2022-02-16 14:38:01,836 INFO L226 Difference]: Without dead ends: 1063 [2022-02-16 14:38:01,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4662 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=892, Invalid=18848, Unknown=0, NotChecked=0, Total=19740 [2022-02-16 14:38:01,839 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 5047 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 5192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:01,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 858 Invalid, 5192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5047 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-16 14:38:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-02-16 14:38:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 662. [2022-02-16 14:38:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.302571860816944) internal successors, (861), 661 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 861 transitions. [2022-02-16 14:38:01,848 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 861 transitions. Word has length 48 [2022-02-16 14:38:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:01,848 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 861 transitions. [2022-02-16 14:38:01,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 92 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 861 transitions. [2022-02-16 14:38:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:01,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:01,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:02,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-16 14:38:02,063 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash -727237697, now seen corresponding path program 49 times [2022-02-16 14:38:02,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:02,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405467564] [2022-02-16 14:38:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:02,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:03,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:03,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405467564] [2022-02-16 14:38:03,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405467564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:03,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119093922] [2022-02-16 14:38:03,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:38:03,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:03,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:03,141 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:03,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 14:38:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:03,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:38:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:04,419 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-16 14:38:04,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-02-16 14:38:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:04,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:06,759 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:38:06,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:38:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:06,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119093922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:06,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:06,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 84 [2022-02-16 14:38:06,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898533763] [2022-02-16 14:38:06,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-16 14:38:06,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-16 14:38:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6821, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:38:06,964 INFO L87 Difference]: Start difference. First operand 662 states and 861 transitions. Second operand has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:11,051 INFO L93 Difference]: Finished difference Result 1063 states and 1382 transitions. [2022-02-16 14:38:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:38:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:11,052 INFO L225 Difference]: With dead ends: 1063 [2022-02-16 14:38:11,052 INFO L226 Difference]: Without dead ends: 1038 [2022-02-16 14:38:11,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=684, Invalid=14322, Unknown=0, NotChecked=0, Total=15006 [2022-02-16 14:38:11,054 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 146 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:11,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 681 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3533 Invalid, 0 Unknown, 116 Unchecked, 1.4s Time] [2022-02-16 14:38:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-02-16 14:38:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 656. [2022-02-16 14:38:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.3038167938931298) internal successors, (854), 655 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 854 transitions. [2022-02-16 14:38:11,061 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 854 transitions. Word has length 48 [2022-02-16 14:38:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 854 transitions. [2022-02-16 14:38:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 854 transitions. [2022-02-16 14:38:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:11,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:11,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:11,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:11,264 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 243731431, now seen corresponding path program 50 times [2022-02-16 14:38:11,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:11,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586028549] [2022-02-16 14:38:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:11,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:12,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:12,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586028549] [2022-02-16 14:38:12,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586028549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:12,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007310010] [2022-02-16 14:38:12,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:38:12,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:12,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:12,348 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:12,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 14:38:12,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:38:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:12,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:38:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:13,640 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-02-16 14:38:13,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-02-16 14:38:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:14,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:16,047 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:38:16,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:38:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:16,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007310010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:16,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:16,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 84 [2022-02-16 14:38:16,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207734012] [2022-02-16 14:38:16,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:16,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-16 14:38:16,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-16 14:38:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=6824, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:38:16,237 INFO L87 Difference]: Start difference. First operand 656 states and 854 transitions. Second operand has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:20,466 INFO L93 Difference]: Finished difference Result 1035 states and 1352 transitions. [2022-02-16 14:38:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:38:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:20,467 INFO L225 Difference]: With dead ends: 1035 [2022-02-16 14:38:20,467 INFO L226 Difference]: Without dead ends: 1006 [2022-02-16 14:38:20,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=679, Invalid=14327, Unknown=0, NotChecked=0, Total=15006 [2022-02-16 14:38:20,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3787 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:20,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 754 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3787 Invalid, 0 Unknown, 45 Unchecked, 1.6s Time] [2022-02-16 14:38:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-02-16 14:38:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 651. [2022-02-16 14:38:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 1.3046153846153845) internal successors, (848), 650 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 848 transitions. [2022-02-16 14:38:20,480 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 848 transitions. Word has length 48 [2022-02-16 14:38:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 848 transitions. [2022-02-16 14:38:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 848 transitions. [2022-02-16 14:38:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:20,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:20,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:20,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:20,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-16 14:38:20,700 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1197864841, now seen corresponding path program 51 times [2022-02-16 14:38:20,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:20,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781627250] [2022-02-16 14:38:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:20,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:21,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781627250] [2022-02-16 14:38:21,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781627250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794226160] [2022-02-16 14:38:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:38:21,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:21,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:21,668 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:21,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 14:38:21,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:38:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:21,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-16 14:38:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:22,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:38:22,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2022-02-16 14:38:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:23,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:25,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:25,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:38:25,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 94 [2022-02-16 14:38:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:26,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794226160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:26,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:26,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2022-02-16 14:38:26,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545912469] [2022-02-16 14:38:26,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:26,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-16 14:38:26,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-16 14:38:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=5413, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:38:26,103 INFO L87 Difference]: Start difference. First operand 651 states and 848 transitions. Second operand has 78 states, 78 states have (on average 1.705128205128205) internal successors, (133), 77 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:29,574 INFO L93 Difference]: Finished difference Result 772 states and 998 transitions. [2022-02-16 14:38:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-16 14:38:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.705128205128205) internal successors, (133), 77 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:29,575 INFO L225 Difference]: With dead ends: 772 [2022-02-16 14:38:29,575 INFO L226 Difference]: Without dead ends: 760 [2022-02-16 14:38:29,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1391, Invalid=13129, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:38:29,577 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 143 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:29,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 553 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1454 Invalid, 0 Unknown, 403 Unchecked, 0.6s Time] [2022-02-16 14:38:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-16 14:38:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 670. [2022-02-16 14:38:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.3004484304932735) internal successors, (870), 669 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 870 transitions. [2022-02-16 14:38:29,584 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 870 transitions. Word has length 48 [2022-02-16 14:38:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:29,584 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 870 transitions. [2022-02-16 14:38:29,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.705128205128205) internal successors, (133), 77 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 870 transitions. [2022-02-16 14:38:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:29,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:29,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:29,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:29,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 14:38:29,811 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 723386189, now seen corresponding path program 52 times [2022-02-16 14:38:29,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:29,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919586017] [2022-02-16 14:38:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:29,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:30,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:30,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919586017] [2022-02-16 14:38:30,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919586017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:30,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60015394] [2022-02-16 14:38:30,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:38:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:30,744 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:30,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 14:38:30,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:38:30,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:30,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:38:30,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:31,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:38:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:32,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:34,083 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:38:34,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 122 [2022-02-16 14:38:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:34,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60015394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:34,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:34,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 74 [2022-02-16 14:38:34,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480464286] [2022-02-16 14:38:34,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:38:34,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:38:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=5238, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:38:34,252 INFO L87 Difference]: Start difference. First operand 670 states and 870 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:37,567 INFO L93 Difference]: Finished difference Result 1137 states and 1505 transitions. [2022-02-16 14:38:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:38:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:37,569 INFO L225 Difference]: With dead ends: 1137 [2022-02-16 14:38:37,569 INFO L226 Difference]: Without dead ends: 1123 [2022-02-16 14:38:37,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=734, Invalid=11922, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:38:37,571 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:37,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 442 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2516 Invalid, 0 Unknown, 407 Unchecked, 1.1s Time] [2022-02-16 14:38:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-02-16 14:38:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 668. [2022-02-16 14:38:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.2998500749625188) internal successors, (867), 667 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 867 transitions. [2022-02-16 14:38:37,580 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 867 transitions. Word has length 48 [2022-02-16 14:38:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:37,580 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 867 transitions. [2022-02-16 14:38:37,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 867 transitions. [2022-02-16 14:38:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:37,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:37,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:37,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:37,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:37,803 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -795096125, now seen corresponding path program 53 times [2022-02-16 14:38:37,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:37,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498055130] [2022-02-16 14:38:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:37,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:38,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:38,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498055130] [2022-02-16 14:38:38,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498055130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:38,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551081638] [2022-02-16 14:38:38,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:38:38,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:38,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:38,723 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:38,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 14:38:38,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:38:38,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:38,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-16 14:38:38,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:40,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:40,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:40,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:40,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:38:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:40,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:42,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:42,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:38:42,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 103 [2022-02-16 14:38:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:42,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551081638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:42,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:42,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2022-02-16 14:38:42,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291951390] [2022-02-16 14:38:42,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-16 14:38:42,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-16 14:38:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5417, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:38:42,661 INFO L87 Difference]: Start difference. First operand 668 states and 867 transitions. Second operand has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:38:54,042 INFO L93 Difference]: Finished difference Result 1255 states and 1609 transitions. [2022-02-16 14:38:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-16 14:38:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:38:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:38:54,044 INFO L225 Difference]: With dead ends: 1255 [2022-02-16 14:38:54,044 INFO L226 Difference]: Without dead ends: 1231 [2022-02-16 14:38:54,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7607 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2788, Invalid=24934, Unknown=0, NotChecked=0, Total=27722 [2022-02-16 14:38:54,046 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 497 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 3391 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 3391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:38:54,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 483 Invalid, 3941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 3391 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-16 14:38:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-02-16 14:38:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 681. [2022-02-16 14:38:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3) internal successors, (884), 680 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 884 transitions. [2022-02-16 14:38:54,054 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 884 transitions. Word has length 48 [2022-02-16 14:38:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:38:54,054 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 884 transitions. [2022-02-16 14:38:54,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:38:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 884 transitions. [2022-02-16 14:38:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:38:54,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:38:54,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:38:54,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-16 14:38:54,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:54,256 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:38:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:38:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1269574777, now seen corresponding path program 54 times [2022-02-16 14:38:54,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:38:54,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528527612] [2022-02-16 14:38:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:38:54,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:38:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:38:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:55,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:38:55,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528527612] [2022-02-16 14:38:55,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528527612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:38:55,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597018170] [2022-02-16 14:38:55,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:38:55,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:38:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:38:55,164 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:38:55,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 14:38:55,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:38:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:38:55,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:38:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:38:56,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:56,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:38:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:38:56,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:38:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:56,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:38:58,444 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:38:58,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:38:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:38:58,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597018170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:38:58,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:38:58,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 71 [2022-02-16 14:38:58,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117759461] [2022-02-16 14:38:58,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:38:58,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:38:58,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:38:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:38:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4814, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:38:58,660 INFO L87 Difference]: Start difference. First operand 681 states and 884 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:01,689 INFO L93 Difference]: Finished difference Result 1070 states and 1413 transitions. [2022-02-16 14:39:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:39:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:01,690 INFO L225 Difference]: With dead ends: 1070 [2022-02-16 14:39:01,690 INFO L226 Difference]: Without dead ends: 1056 [2022-02-16 14:39:01,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2687 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=657, Invalid=10685, Unknown=0, NotChecked=0, Total=11342 [2022-02-16 14:39:01,691 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:01,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 465 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2132 Invalid, 0 Unknown, 687 Unchecked, 0.9s Time] [2022-02-16 14:39:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-16 14:39:01,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 677. [2022-02-16 14:39:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.3002958579881656) internal successors, (879), 676 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 879 transitions. [2022-02-16 14:39:01,697 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 879 transitions. Word has length 48 [2022-02-16 14:39:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 879 transitions. [2022-02-16 14:39:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 879 transitions. [2022-02-16 14:39:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:01,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:01,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:01,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 14:39:01,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:01,899 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1547435847, now seen corresponding path program 55 times [2022-02-16 14:39:01,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:01,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209839765] [2022-02-16 14:39:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:01,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:02,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:02,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209839765] [2022-02-16 14:39:02,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209839765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:02,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290107163] [2022-02-16 14:39:02,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:39:02,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:02,818 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:02,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 14:39:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:02,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:39:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:04,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:39:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:04,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:06,432 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:39:06,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:39:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:06,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290107163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:06,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:06,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:39:06,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073577396] [2022-02-16 14:39:06,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:39:06,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:39:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=5539, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:39:06,640 INFO L87 Difference]: Start difference. First operand 677 states and 879 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:10,322 INFO L93 Difference]: Finished difference Result 1170 states and 1532 transitions. [2022-02-16 14:39:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:39:10,322 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:10,323 INFO L225 Difference]: With dead ends: 1170 [2022-02-16 14:39:10,323 INFO L226 Difference]: Without dead ends: 1152 [2022-02-16 14:39:10,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=712, Invalid=12170, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:39:10,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 118 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 972 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:10,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 623 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2970 Invalid, 0 Unknown, 972 Unchecked, 1.2s Time] [2022-02-16 14:39:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-02-16 14:39:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 677. [2022-02-16 14:39:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.2988165680473374) internal successors, (878), 676 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 878 transitions. [2022-02-16 14:39:10,331 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 878 transitions. Word has length 48 [2022-02-16 14:39:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 878 transitions. [2022-02-16 14:39:10,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 878 transitions. [2022-02-16 14:39:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:10,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:10,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:10,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:10,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-16 14:39:10,533 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash 267339013, now seen corresponding path program 56 times [2022-02-16 14:39:10,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:10,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381473827] [2022-02-16 14:39:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:10,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:11,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:11,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381473827] [2022-02-16 14:39:11,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381473827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:11,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114336373] [2022-02-16 14:39:11,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:39:11,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:11,466 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:11,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 14:39:11,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:39:11,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:11,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:39:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:12,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:39:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:13,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:14,787 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:39:14,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:39:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:15,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114336373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:15,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:15,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 71 [2022-02-16 14:39:15,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990361831] [2022-02-16 14:39:15,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:15,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:39:15,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:39:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4814, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:39:15,008 INFO L87 Difference]: Start difference. First operand 677 states and 878 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:18,114 INFO L93 Difference]: Finished difference Result 1019 states and 1339 transitions. [2022-02-16 14:39:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:39:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:18,115 INFO L225 Difference]: With dead ends: 1019 [2022-02-16 14:39:18,115 INFO L226 Difference]: Without dead ends: 1002 [2022-02-16 14:39:18,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=695, Invalid=11077, Unknown=0, NotChecked=0, Total=11772 [2022-02-16 14:39:18,116 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1090 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 462 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2072 Invalid, 0 Unknown, 1090 Unchecked, 0.9s Time] [2022-02-16 14:39:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-02-16 14:39:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 671. [2022-02-16 14:39:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.3) internal successors, (871), 670 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 871 transitions. [2022-02-16 14:39:18,122 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 871 transitions. Word has length 48 [2022-02-16 14:39:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:18,122 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 871 transitions. [2022-02-16 14:39:18,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 871 transitions. [2022-02-16 14:39:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:18,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:18,123 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:18,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:18,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 14:39:18,324 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -6719551, now seen corresponding path program 57 times [2022-02-16 14:39:18,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:18,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023422010] [2022-02-16 14:39:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:18,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:19,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:19,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023422010] [2022-02-16 14:39:19,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023422010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:19,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116565972] [2022-02-16 14:39:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:39:19,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:19,247 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:19,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 14:39:19,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:39:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:19,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:39:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:20,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:20,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:39:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:23,520 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:39:23,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 126 [2022-02-16 14:39:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:23,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116565972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:23,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:23,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 84 [2022-02-16 14:39:23,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397329431] [2022-02-16 14:39:23,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:23,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-16 14:39:23,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-16 14:39:23,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=6755, Unknown=0, NotChecked=0, Total=7140 [2022-02-16 14:39:23,772 INFO L87 Difference]: Start difference. First operand 671 states and 871 transitions. Second operand has 85 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:26,237 INFO L93 Difference]: Finished difference Result 981 states and 1276 transitions. [2022-02-16 14:39:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-16 14:39:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:26,238 INFO L225 Difference]: With dead ends: 981 [2022-02-16 14:39:26,239 INFO L226 Difference]: Without dead ends: 962 [2022-02-16 14:39:26,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=647, Invalid=10909, Unknown=0, NotChecked=0, Total=11556 [2022-02-16 14:39:26,240 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 133 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1093 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:26,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 639 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2030 Invalid, 0 Unknown, 1093 Unchecked, 0.9s Time] [2022-02-16 14:39:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-16 14:39:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 670. [2022-02-16 14:39:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.2989536621823616) internal successors, (869), 669 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 869 transitions. [2022-02-16 14:39:26,247 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 869 transitions. Word has length 48 [2022-02-16 14:39:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:26,247 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 869 transitions. [2022-02-16 14:39:26,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 869 transitions. [2022-02-16 14:39:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:26,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:26,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-16 14:39:26,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:26,451 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -542803541, now seen corresponding path program 58 times [2022-02-16 14:39:26,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:26,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767089487] [2022-02-16 14:39:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:26,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:27,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:27,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767089487] [2022-02-16 14:39:27,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767089487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:27,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479749176] [2022-02-16 14:39:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:39:27,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:27,374 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:27,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 14:39:27,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:39:27,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:27,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:39:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:28,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:28,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:28,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:39:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:29,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:30,609 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:39:30,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:39:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:30,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479749176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:30,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:30,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:39:30,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519707982] [2022-02-16 14:39:30,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:30,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:39:30,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:39:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=4828, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:39:30,828 INFO L87 Difference]: Start difference. First operand 670 states and 869 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:34,018 INFO L93 Difference]: Finished difference Result 1027 states and 1348 transitions. [2022-02-16 14:39:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:39:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:34,019 INFO L225 Difference]: With dead ends: 1027 [2022-02-16 14:39:34,019 INFO L226 Difference]: Without dead ends: 1015 [2022-02-16 14:39:34,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=644, Invalid=11128, Unknown=0, NotChecked=0, Total=11772 [2022-02-16 14:39:34,020 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:34,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 589 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2235 Invalid, 0 Unknown, 795 Unchecked, 0.9s Time] [2022-02-16 14:39:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-02-16 14:39:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 693. [2022-02-16 14:39:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.2976878612716762) internal successors, (898), 692 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 898 transitions. [2022-02-16 14:39:34,027 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 898 transitions. Word has length 48 [2022-02-16 14:39:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:34,027 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 898 transitions. [2022-02-16 14:39:34,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 898 transitions. [2022-02-16 14:39:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:34,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:34,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:34,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:34,230 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1017282193, now seen corresponding path program 59 times [2022-02-16 14:39:34,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:34,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042181049] [2022-02-16 14:39:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:34,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:35,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:35,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042181049] [2022-02-16 14:39:35,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042181049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:35,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790446302] [2022-02-16 14:39:35,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:39:35,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:35,221 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 14:39:35,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:39:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:35,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 67 conjunts are in the unsatisfiable core [2022-02-16 14:39:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:36,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:39:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:36,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:38,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:39:38,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 103 [2022-02-16 14:39:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:39,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790446302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:39,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:39,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 77 [2022-02-16 14:39:39,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386968899] [2022-02-16 14:39:39,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:39,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-16 14:39:39,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-16 14:39:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=5427, Unknown=0, NotChecked=0, Total=6006 [2022-02-16 14:39:39,036 INFO L87 Difference]: Start difference. First operand 693 states and 898 transitions. Second operand has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:48,606 INFO L93 Difference]: Finished difference Result 1132 states and 1463 transitions. [2022-02-16 14:39:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-16 14:39:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:48,607 INFO L225 Difference]: With dead ends: 1132 [2022-02-16 14:39:48,607 INFO L226 Difference]: Without dead ends: 1101 [2022-02-16 14:39:48,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6372 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2281, Invalid=21281, Unknown=0, NotChecked=0, Total=23562 [2022-02-16 14:39:48,609 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 368 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:48,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 556 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 3495 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-16 14:39:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-02-16 14:39:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 691. [2022-02-16 14:39:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 1.298550724637681) internal successors, (896), 690 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 896 transitions. [2022-02-16 14:39:48,616 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 896 transitions. Word has length 48 [2022-02-16 14:39:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:48,616 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 896 transitions. [2022-02-16 14:39:48,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6794871794871795) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 896 transitions. [2022-02-16 14:39:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:48,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:48,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:48,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:48,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:48,818 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1799728431, now seen corresponding path program 60 times [2022-02-16 14:39:48,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:48,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174667345] [2022-02-16 14:39:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:48,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:49,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:49,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174667345] [2022-02-16 14:39:49,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174667345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:49,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359600444] [2022-02-16 14:39:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:39:49,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:49,751 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 14:39:49,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:39:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:39:49,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:39:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:50,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:51,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:51,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:39:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:51,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:39:53,243 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:39:53,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:39:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:53,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359600444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:39:53,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:39:53,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:39:53,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457147819] [2022-02-16 14:39:53,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:39:53,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:39:53,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:39:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:39:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=5545, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:39:53,472 INFO L87 Difference]: Start difference. First operand 691 states and 896 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:39:56,858 INFO L93 Difference]: Finished difference Result 1001 states and 1309 transitions. [2022-02-16 14:39:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-16 14:39:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:39:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:39:56,860 INFO L225 Difference]: With dead ends: 1001 [2022-02-16 14:39:56,860 INFO L226 Difference]: Without dead ends: 981 [2022-02-16 14:39:56,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=685, Invalid=12425, Unknown=0, NotChecked=0, Total=13110 [2022-02-16 14:39:56,861 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:39:56,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 502 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2424 Invalid, 0 Unknown, 656 Unchecked, 1.0s Time] [2022-02-16 14:39:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-16 14:39:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 689. [2022-02-16 14:39:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.2979651162790697) internal successors, (893), 688 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 893 transitions. [2022-02-16 14:39:56,867 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 893 transitions. Word has length 48 [2022-02-16 14:39:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:39:56,867 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 893 transitions. [2022-02-16 14:39:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:39:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 893 transitions. [2022-02-16 14:39:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:39:56,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:39:56,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:39:56,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-16 14:39:57,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:57,069 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:39:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:39:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1115618631, now seen corresponding path program 61 times [2022-02-16 14:39:57,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:39:57,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252703193] [2022-02-16 14:39:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:39:57,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:39:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:57,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:39:57,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252703193] [2022-02-16 14:39:57,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252703193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:39:57,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826456518] [2022-02-16 14:39:57,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:39:57,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:39:57,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:39:57,980 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:39:57,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 14:39:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:39:58,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:39:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:39:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:39:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:59,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:39:59,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:39:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:39:59,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:01,243 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:01,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:01,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826456518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:01,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:01,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:40:01,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084636156] [2022-02-16 14:40:01,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:01,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:40:01,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:01,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:40:01,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=4828, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:40:01,455 INFO L87 Difference]: Start difference. First operand 689 states and 893 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:04,333 INFO L93 Difference]: Finished difference Result 989 states and 1296 transitions. [2022-02-16 14:40:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 14:40:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:04,334 INFO L225 Difference]: With dead ends: 989 [2022-02-16 14:40:04,334 INFO L226 Difference]: Without dead ends: 972 [2022-02-16 14:40:04,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=614, Invalid=10516, Unknown=0, NotChecked=0, Total=11130 [2022-02-16 14:40:04,335 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:04,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 501 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2045 Invalid, 0 Unknown, 695 Unchecked, 0.8s Time] [2022-02-16 14:40:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-16 14:40:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 682. [2022-02-16 14:40:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.2995594713656389) internal successors, (885), 681 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 885 transitions. [2022-02-16 14:40:04,344 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 885 transitions. Word has length 48 [2022-02-16 14:40:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:04,344 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 885 transitions. [2022-02-16 14:40:04,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 885 transitions. [2022-02-16 14:40:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:04,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:04,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:04,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-16 14:40:04,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-16 14:40:04,567 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash 367081415, now seen corresponding path program 62 times [2022-02-16 14:40:04,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:04,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467365123] [2022-02-16 14:40:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:04,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:05,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:05,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467365123] [2022-02-16 14:40:05,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467365123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:05,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740982758] [2022-02-16 14:40:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:40:05,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:05,474 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:05,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 14:40:05,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:40:05,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:05,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:40:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:06,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:40:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:07,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:08,851 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:08,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:09,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740982758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:09,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:09,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 73 [2022-02-16 14:40:09,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233199000] [2022-02-16 14:40:09,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:09,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-16 14:40:09,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-16 14:40:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=5111, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:40:09,011 INFO L87 Difference]: Start difference. First operand 682 states and 885 transitions. Second operand has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:12,396 INFO L93 Difference]: Finished difference Result 1106 states and 1449 transitions. [2022-02-16 14:40:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-16 14:40:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:12,397 INFO L225 Difference]: With dead ends: 1106 [2022-02-16 14:40:12,397 INFO L226 Difference]: Without dead ends: 1084 [2022-02-16 14:40:12,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=633, Invalid=11139, Unknown=0, NotChecked=0, Total=11772 [2022-02-16 14:40:12,398 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 120 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:12,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 524 Invalid, 3418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2869 Invalid, 0 Unknown, 477 Unchecked, 1.2s Time] [2022-02-16 14:40:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-16 14:40:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 678. [2022-02-16 14:40:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.2983751846381093) internal successors, (879), 677 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 879 transitions. [2022-02-16 14:40:12,406 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 879 transitions. Word has length 48 [2022-02-16 14:40:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:12,406 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 879 transitions. [2022-02-16 14:40:12,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 879 transitions. [2022-02-16 14:40:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:12,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:12,407 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:12,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-16 14:40:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:12,608 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -956406777, now seen corresponding path program 63 times [2022-02-16 14:40:12,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:12,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770356269] [2022-02-16 14:40:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:12,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:13,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:13,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770356269] [2022-02-16 14:40:13,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770356269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:13,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356394931] [2022-02-16 14:40:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:40:13,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:13,553 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:13,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 14:40:13,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:40:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:13,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:40:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:14,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:40:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:15,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:17,131 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:17,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:17,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356394931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:17,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:17,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:40:17,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507715300] [2022-02-16 14:40:17,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:17,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:40:17,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:40:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=5548, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:40:17,341 INFO L87 Difference]: Start difference. First operand 678 states and 879 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:20,786 INFO L93 Difference]: Finished difference Result 1091 states and 1426 transitions. [2022-02-16 14:40:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:40:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:20,787 INFO L225 Difference]: With dead ends: 1091 [2022-02-16 14:40:20,787 INFO L226 Difference]: Without dead ends: 1068 [2022-02-16 14:40:20,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2785 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=666, Invalid=12216, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:40:20,789 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 2799 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:20,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 626 Invalid, 3481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2799 Invalid, 0 Unknown, 618 Unchecked, 1.1s Time] [2022-02-16 14:40:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-02-16 14:40:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 674. [2022-02-16 14:40:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.298662704309064) internal successors, (874), 673 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 874 transitions. [2022-02-16 14:40:20,795 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 874 transitions. Word has length 48 [2022-02-16 14:40:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:20,795 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 874 transitions. [2022-02-16 14:40:20,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 874 transitions. [2022-02-16 14:40:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:20,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:20,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:20,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-16 14:40:20,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-16 14:40:20,997 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1266362317, now seen corresponding path program 64 times [2022-02-16 14:40:20,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:20,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923590629] [2022-02-16 14:40:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:20,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:21,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:21,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923590629] [2022-02-16 14:40:21,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923590629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:21,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267056709] [2022-02-16 14:40:21,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:40:21,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:21,926 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:21,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 14:40:21,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:40:21,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:21,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:40:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:23,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:23,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:40:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:23,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:25,458 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:25,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:25,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267056709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:25,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:25,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:40:25,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598179166] [2022-02-16 14:40:25,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:40:25,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:40:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=5553, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:40:25,616 INFO L87 Difference]: Start difference. First operand 674 states and 874 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:28,192 INFO L93 Difference]: Finished difference Result 948 states and 1240 transitions. [2022-02-16 14:40:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:40:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:28,193 INFO L225 Difference]: With dead ends: 948 [2022-02-16 14:40:28,193 INFO L226 Difference]: Without dead ends: 924 [2022-02-16 14:40:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=563, Invalid=10149, Unknown=0, NotChecked=0, Total=10712 [2022-02-16 14:40:28,195 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 882 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:28,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 558 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2096 Invalid, 0 Unknown, 882 Unchecked, 0.8s Time] [2022-02-16 14:40:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-02-16 14:40:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 672. [2022-02-16 14:40:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.2980625931445604) internal successors, (871), 671 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 871 transitions. [2022-02-16 14:40:28,210 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 871 transitions. Word has length 48 [2022-02-16 14:40:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 871 transitions. [2022-02-16 14:40:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 871 transitions. [2022-02-16 14:40:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:28,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:28,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:28,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 14:40:28,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-16 14:40:28,411 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1965077343, now seen corresponding path program 65 times [2022-02-16 14:40:28,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:28,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385596738] [2022-02-16 14:40:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:28,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:29,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:29,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385596738] [2022-02-16 14:40:29,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385596738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:29,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271294575] [2022-02-16 14:40:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:40:29,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:29,343 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 14:40:29,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:40:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:29,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:40:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:30,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:30,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:40:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:32,493 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:32,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:32,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271294575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:32,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:32,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:40:32,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990479821] [2022-02-16 14:40:32,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:32,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:40:32,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:40:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4811, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:40:32,651 INFO L87 Difference]: Start difference. First operand 672 states and 871 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:35,414 INFO L93 Difference]: Finished difference Result 779 states and 1031 transitions. [2022-02-16 14:40:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:40:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:35,415 INFO L225 Difference]: With dead ends: 779 [2022-02-16 14:40:35,415 INFO L226 Difference]: Without dead ends: 767 [2022-02-16 14:40:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=682, Invalid=10238, Unknown=0, NotChecked=0, Total=10920 [2022-02-16 14:40:35,416 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:35,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 527 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1661 Invalid, 0 Unknown, 189 Unchecked, 0.7s Time] [2022-02-16 14:40:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-16 14:40:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 692. [2022-02-16 14:40:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2952243125904486) internal successors, (895), 691 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 895 transitions. [2022-02-16 14:40:35,422 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 895 transitions. Word has length 48 [2022-02-16 14:40:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:35,422 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 895 transitions. [2022-02-16 14:40:35,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 895 transitions. [2022-02-16 14:40:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:35,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:35,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:35,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-16 14:40:35,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 14:40:35,624 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1855411301, now seen corresponding path program 66 times [2022-02-16 14:40:35,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:35,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628763589] [2022-02-16 14:40:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:35,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:36,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:36,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628763589] [2022-02-16 14:40:36,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628763589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:36,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248517748] [2022-02-16 14:40:36,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:40:36,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:36,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:36,548 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:36,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 14:40:36,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:40:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:36,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-16 14:40:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:37,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:37,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:37,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:40:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:38,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:40,125 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:40,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 125 [2022-02-16 14:40:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:40,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248517748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:40,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:40,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 78 [2022-02-16 14:40:40,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181168837] [2022-02-16 14:40:40,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:40,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-16 14:40:40,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-16 14:40:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=5801, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:40:40,361 INFO L87 Difference]: Start difference. First operand 692 states and 895 transitions. Second operand has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:45,531 INFO L93 Difference]: Finished difference Result 1040 states and 1382 transitions. [2022-02-16 14:40:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-16 14:40:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:45,532 INFO L225 Difference]: With dead ends: 1040 [2022-02-16 14:40:45,532 INFO L226 Difference]: Without dead ends: 1026 [2022-02-16 14:40:45,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1002, Invalid=16028, Unknown=0, NotChecked=0, Total=17030 [2022-02-16 14:40:45,533 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 3951 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:45,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 428 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3951 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-16 14:40:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-02-16 14:40:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 683. [2022-02-16 14:40:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 1.2976539589442815) internal successors, (885), 682 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 885 transitions. [2022-02-16 14:40:45,541 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 885 transitions. Word has length 48 [2022-02-16 14:40:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:45,541 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 885 transitions. [2022-02-16 14:40:45,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 885 transitions. [2022-02-16 14:40:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:45,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:45,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:45,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 14:40:45,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-16 14:40:45,763 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash 336928987, now seen corresponding path program 67 times [2022-02-16 14:40:45,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:45,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281926151] [2022-02-16 14:40:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:45,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:46,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:46,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281926151] [2022-02-16 14:40:46,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281926151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:46,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537178727] [2022-02-16 14:40:46,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:40:46,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:46,681 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:46,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 14:40:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:46,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:40:46,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:47,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:47,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:47,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:40:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:49,969 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:49,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:50,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537178727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:50,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:50,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:40:50,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411837152] [2022-02-16 14:40:50,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:50,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:40:50,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:40:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=4816, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:40:50,188 INFO L87 Difference]: Start difference. First operand 683 states and 885 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:40:54,486 INFO L93 Difference]: Finished difference Result 996 states and 1306 transitions. [2022-02-16 14:40:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:40:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:40:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:40:54,488 INFO L225 Difference]: With dead ends: 996 [2022-02-16 14:40:54,488 INFO L226 Difference]: Without dead ends: 984 [2022-02-16 14:40:54,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=816, Invalid=13226, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:40:54,490 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:40:54,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 462 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2714 Invalid, 0 Unknown, 310 Unchecked, 1.2s Time] [2022-02-16 14:40:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-16 14:40:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 692. [2022-02-16 14:40:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2981186685962374) internal successors, (897), 691 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 897 transitions. [2022-02-16 14:40:54,499 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 897 transitions. Word has length 48 [2022-02-16 14:40:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:40:54,499 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 897 transitions. [2022-02-16 14:40:54,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:40:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 897 transitions. [2022-02-16 14:40:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:40:54,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:40:54,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:40:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-16 14:40:54,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:54,716 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:40:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:40:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash -137549665, now seen corresponding path program 68 times [2022-02-16 14:40:54,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:40:54,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956363771] [2022-02-16 14:40:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:40:54,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:40:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:40:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:55,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:40:55,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956363771] [2022-02-16 14:40:55,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956363771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:40:55,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284670923] [2022-02-16 14:40:55,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:40:55,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:40:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:40:55,657 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:40:55,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 14:40:55,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:40:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:40:55,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:40:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:40:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:56,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:40:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:40:56,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:40:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:57,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:40:58,871 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:40:58,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:40:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:40:59,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284670923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:40:59,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:40:59,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 71 [2022-02-16 14:40:59,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826156882] [2022-02-16 14:40:59,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:40:59,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:40:59,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:40:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:40:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=4810, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:40:59,030 INFO L87 Difference]: Start difference. First operand 692 states and 897 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:03,545 INFO L93 Difference]: Finished difference Result 1015 states and 1330 transitions. [2022-02-16 14:41:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:41:03,546 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:03,547 INFO L225 Difference]: With dead ends: 1015 [2022-02-16 14:41:03,547 INFO L226 Difference]: Without dead ends: 1001 [2022-02-16 14:41:03,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3454 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=826, Invalid=13216, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:41:03,548 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:03,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 490 Invalid, 3900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3168 Invalid, 0 Unknown, 635 Unchecked, 1.3s Time] [2022-02-16 14:41:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-02-16 14:41:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 692. [2022-02-16 14:41:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2981186685962374) internal successors, (897), 691 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 897 transitions. [2022-02-16 14:41:03,554 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 897 transitions. Word has length 48 [2022-02-16 14:41:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:03,554 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 897 transitions. [2022-02-16 14:41:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 897 transitions. [2022-02-16 14:41:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:03,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:03,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:03,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 14:41:03,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:03,756 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1615506337, now seen corresponding path program 69 times [2022-02-16 14:41:03,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:03,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064091035] [2022-02-16 14:41:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:03,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:04,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:04,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064091035] [2022-02-16 14:41:04,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064091035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:04,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510293636] [2022-02-16 14:41:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:41:04,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:04,664 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:04,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 14:41:04,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:41:04,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:41:04,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:41:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:05,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:05,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:41:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:08,175 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:08,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:41:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:08,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510293636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:08,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:08,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:41:08,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124399567] [2022-02-16 14:41:08,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:08,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:41:08,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:41:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=5535, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:41:08,387 INFO L87 Difference]: Start difference. First operand 692 states and 897 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:12,953 INFO L93 Difference]: Finished difference Result 1002 states and 1311 transitions. [2022-02-16 14:41:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:41:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:12,954 INFO L225 Difference]: With dead ends: 1002 [2022-02-16 14:41:12,954 INFO L226 Difference]: Without dead ends: 984 [2022-02-16 14:41:12,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=835, Invalid=14417, Unknown=0, NotChecked=0, Total=15252 [2022-02-16 14:41:12,956 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 3258 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 4323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 959 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:12,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 528 Invalid, 4323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3258 Invalid, 0 Unknown, 959 Unchecked, 1.4s Time] [2022-02-16 14:41:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-16 14:41:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 692. [2022-02-16 14:41:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.296671490593343) internal successors, (896), 691 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 896 transitions. [2022-02-16 14:41:12,962 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 896 transitions. Word has length 48 [2022-02-16 14:41:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:12,963 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 896 transitions. [2022-02-16 14:41:12,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 896 transitions. [2022-02-16 14:41:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:12,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:12,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:12,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-16 14:41:13,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:13,165 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1873842777, now seen corresponding path program 70 times [2022-02-16 14:41:13,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:13,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480062432] [2022-02-16 14:41:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:13,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:14,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:14,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480062432] [2022-02-16 14:41:14,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480062432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:14,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677079810] [2022-02-16 14:41:14,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:41:14,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:14,097 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:14,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 14:41:14,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:41:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:41:14,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:41:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:15,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:41:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:15,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:17,403 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:17,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:41:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:17,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677079810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:17,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:17,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:41:17,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924188572] [2022-02-16 14:41:17,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:41:17,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:41:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=4816, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:41:17,610 INFO L87 Difference]: Start difference. First operand 692 states and 896 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:21,883 INFO L93 Difference]: Finished difference Result 999 states and 1311 transitions. [2022-02-16 14:41:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-16 14:41:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:21,884 INFO L225 Difference]: With dead ends: 999 [2022-02-16 14:41:21,884 INFO L226 Difference]: Without dead ends: 982 [2022-02-16 14:41:21,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=801, Invalid=12771, Unknown=0, NotChecked=0, Total=13572 [2022-02-16 14:41:21,885 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:21,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 443 Invalid, 3584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2882 Invalid, 0 Unknown, 604 Unchecked, 1.2s Time] [2022-02-16 14:41:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-16 14:41:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 686. [2022-02-16 14:41:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.2978102189781022) internal successors, (889), 685 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 889 transitions. [2022-02-16 14:41:21,893 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 889 transitions. Word has length 48 [2022-02-16 14:41:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:21,893 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 889 transitions. [2022-02-16 14:41:21,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 889 transitions. [2022-02-16 14:41:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:21,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:21,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:21,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-16 14:41:22,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-16 14:41:22,107 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1125305561, now seen corresponding path program 71 times [2022-02-16 14:41:22,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:22,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483229630] [2022-02-16 14:41:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:22,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:23,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:23,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483229630] [2022-02-16 14:41:23,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483229630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:23,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850469267] [2022-02-16 14:41:23,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:41:23,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:23,029 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:23,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 14:41:23,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:41:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:41:23,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:41:23,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:24,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:24,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:24,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:41:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:26,924 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:26,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 123 [2022-02-16 14:41:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:27,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850469267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:27,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:27,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 80 [2022-02-16 14:41:27,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448541359] [2022-02-16 14:41:27,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:27,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-16 14:41:27,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-16 14:41:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=6137, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:41:27,184 INFO L87 Difference]: Start difference. First operand 686 states and 889 transitions. Second operand has 81 states, 81 states have (on average 1.5679012345679013) internal successors, (127), 80 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:31,504 INFO L93 Difference]: Finished difference Result 926 states and 1227 transitions. [2022-02-16 14:41:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:41:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.5679012345679013) internal successors, (127), 80 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:31,505 INFO L225 Difference]: With dead ends: 926 [2022-02-16 14:41:31,505 INFO L226 Difference]: Without dead ends: 907 [2022-02-16 14:41:31,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3340 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=820, Invalid=14186, Unknown=0, NotChecked=0, Total=15006 [2022-02-16 14:41:31,506 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 3208 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:31,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 441 Invalid, 3441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3208 Invalid, 0 Unknown, 111 Unchecked, 1.3s Time] [2022-02-16 14:41:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-16 14:41:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 681. [2022-02-16 14:41:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.2970588235294118) internal successors, (882), 680 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 882 transitions. [2022-02-16 14:41:31,512 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 882 transitions. Word has length 48 [2022-02-16 14:41:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:31,512 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 882 transitions. [2022-02-16 14:41:31,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.5679012345679013) internal successors, (127), 80 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 882 transitions. [2022-02-16 14:41:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:31,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:31,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:31,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-16 14:41:31,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:31,714 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 337284925, now seen corresponding path program 72 times [2022-02-16 14:41:31,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:31,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860447281] [2022-02-16 14:41:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:31,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:32,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:32,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860447281] [2022-02-16 14:41:32,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860447281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:32,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378230740] [2022-02-16 14:41:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:41:32,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:32,656 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:32,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 14:41:32,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:41:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:41:32,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:41:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:33,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:41:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:34,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:36,271 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:36,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 123 [2022-02-16 14:41:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:36,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378230740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:36,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:36,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2022-02-16 14:41:36,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021970228] [2022-02-16 14:41:36,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:36,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-16 14:41:36,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-16 14:41:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5807, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:41:36,467 INFO L87 Difference]: Start difference. First operand 681 states and 882 transitions. Second operand has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:41,224 INFO L93 Difference]: Finished difference Result 994 states and 1304 transitions. [2022-02-16 14:41:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:41:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:41,225 INFO L225 Difference]: With dead ends: 994 [2022-02-16 14:41:41,226 INFO L226 Difference]: Without dead ends: 982 [2022-02-16 14:41:41,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=921, Invalid=15335, Unknown=0, NotChecked=0, Total=16256 [2022-02-16 14:41:41,226 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 3584 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:41,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 552 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3584 Invalid, 0 Unknown, 884 Unchecked, 1.5s Time] [2022-02-16 14:41:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-16 14:41:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 698. [2022-02-16 14:41:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.296987087517934) internal successors, (904), 697 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 904 transitions. [2022-02-16 14:41:41,233 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 904 transitions. Word has length 48 [2022-02-16 14:41:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:41,233 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 904 transitions. [2022-02-16 14:41:41,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 904 transitions. [2022-02-16 14:41:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:41,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:41,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:41,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-16 14:41:41,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:41,435 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash -137193727, now seen corresponding path program 73 times [2022-02-16 14:41:41,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:41,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884121947] [2022-02-16 14:41:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:41,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:42,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:42,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884121947] [2022-02-16 14:41:42,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884121947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:42,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378746403] [2022-02-16 14:41:42,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:41:42,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:42,362 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:42,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 14:41:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:42,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:41:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:43,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:43,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:41:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:45,686 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:45,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:41:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:45,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378746403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:45,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:45,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 74 [2022-02-16 14:41:45,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558389010] [2022-02-16 14:41:45,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:45,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:41:45,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:41:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=5230, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:41:45,897 INFO L87 Difference]: Start difference. First operand 698 states and 904 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:50,593 INFO L93 Difference]: Finished difference Result 1065 states and 1401 transitions. [2022-02-16 14:41:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-16 14:41:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:50,594 INFO L225 Difference]: With dead ends: 1065 [2022-02-16 14:41:50,594 INFO L226 Difference]: Without dead ends: 1048 [2022-02-16 14:41:50,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=908, Invalid=14592, Unknown=0, NotChecked=0, Total=15500 [2022-02-16 14:41:50,596 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 3725 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 4872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1029 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:50,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 562 Invalid, 4872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3725 Invalid, 0 Unknown, 1029 Unchecked, 1.5s Time] [2022-02-16 14:41:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-02-16 14:41:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 688. [2022-02-16 14:41:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2983988355167395) internal successors, (892), 687 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 892 transitions. [2022-02-16 14:41:50,602 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 892 transitions. Word has length 48 [2022-02-16 14:41:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:50,602 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 892 transitions. [2022-02-16 14:41:50,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 892 transitions. [2022-02-16 14:41:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:50,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:50,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:50,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 14:41:50,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-02-16 14:41:50,804 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:41:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:41:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1615150399, now seen corresponding path program 74 times [2022-02-16 14:41:50,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:41:50,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774358836] [2022-02-16 14:41:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:41:50,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:41:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:41:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:51,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:41:51,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774358836] [2022-02-16 14:41:51,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774358836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:41:51,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990270568] [2022-02-16 14:41:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:41:51,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:41:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:41:51,760 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:41:51,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 14:41:51,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:41:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:41:51,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:41:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:41:52,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:52,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:41:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:41:52,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:41:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:53,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:41:55,278 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:41:55,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:41:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:41:55,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990270568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:41:55,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:41:55,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 79 [2022-02-16 14:41:55,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825674630] [2022-02-16 14:41:55,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:41:55,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-16 14:41:55,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:41:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-16 14:41:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=5983, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:41:55,422 INFO L87 Difference]: Start difference. First operand 688 states and 892 transitions. Second operand has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:41:59,848 INFO L93 Difference]: Finished difference Result 975 states and 1278 transitions. [2022-02-16 14:41:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-16 14:41:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:41:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:41:59,850 INFO L225 Difference]: With dead ends: 975 [2022-02-16 14:41:59,850 INFO L226 Difference]: Without dead ends: 955 [2022-02-16 14:41:59,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3754 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=834, Invalid=14916, Unknown=0, NotChecked=0, Total=15750 [2022-02-16 14:41:59,851 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 3237 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 4246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 912 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:41:59,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 524 Invalid, 4246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3237 Invalid, 0 Unknown, 912 Unchecked, 1.3s Time] [2022-02-16 14:41:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-02-16 14:41:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 686. [2022-02-16 14:41:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.2978102189781022) internal successors, (889), 685 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 889 transitions. [2022-02-16 14:41:59,856 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 889 transitions. Word has length 48 [2022-02-16 14:41:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:41:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 889 transitions. [2022-02-16 14:41:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:41:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 889 transitions. [2022-02-16 14:41:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:41:59,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:41:59,857 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:41:59,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:00,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-16 14:42:00,058 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1247169881, now seen corresponding path program 75 times [2022-02-16 14:42:00,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:00,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138685584] [2022-02-16 14:42:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:00,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:00,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:00,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138685584] [2022-02-16 14:42:00,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138685584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:00,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603014663] [2022-02-16 14:42:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:42:00,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:00,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:00,977 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:00,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 14:42:01,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:42:01,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:01,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:42:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:02,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:02,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:42:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:02,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:04,452 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:04,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:04,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603014663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:04,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:04,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:42:04,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532330801] [2022-02-16 14:42:04,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:04,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:42:04,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:04,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:42:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=5531, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:42:04,616 INFO L87 Difference]: Start difference. First operand 686 states and 889 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:09,247 INFO L93 Difference]: Finished difference Result 1055 states and 1388 transitions. [2022-02-16 14:42:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-16 14:42:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:09,248 INFO L225 Difference]: With dead ends: 1055 [2022-02-16 14:42:09,248 INFO L226 Difference]: Without dead ends: 1036 [2022-02-16 14:42:09,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=896, Invalid=14854, Unknown=0, NotChecked=0, Total=15750 [2022-02-16 14:42:09,249 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:09,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 430 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3191 Invalid, 0 Unknown, 486 Unchecked, 1.3s Time] [2022-02-16 14:42:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-02-16 14:42:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 685. [2022-02-16 14:42:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.2967836257309941) internal successors, (887), 684 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 887 transitions. [2022-02-16 14:42:09,255 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 887 transitions. Word has length 48 [2022-02-16 14:42:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 887 transitions. [2022-02-16 14:42:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 887 transitions. [2022-02-16 14:42:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:09,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:09,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:09,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:09,456 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -76318311, now seen corresponding path program 76 times [2022-02-16 14:42:09,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:09,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329937324] [2022-02-16 14:42:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:09,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:10,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:10,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329937324] [2022-02-16 14:42:10,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329937324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:10,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746753908] [2022-02-16 14:42:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:42:10,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:10,409 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:10,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 14:42:10,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:42:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:10,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:42:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:11,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:11,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:11,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:42:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:12,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:14,124 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:14,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:14,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746753908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:14,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:14,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 79 [2022-02-16 14:42:14,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348384636] [2022-02-16 14:42:14,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:14,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-16 14:42:14,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-16 14:42:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=5986, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:42:14,314 INFO L87 Difference]: Start difference. First operand 685 states and 887 transitions. Second operand has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:18,895 INFO L93 Difference]: Finished difference Result 972 states and 1275 transitions. [2022-02-16 14:42:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-16 14:42:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:18,897 INFO L225 Difference]: With dead ends: 972 [2022-02-16 14:42:18,897 INFO L226 Difference]: Without dead ends: 951 [2022-02-16 14:42:18,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3886 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=868, Invalid=15644, Unknown=0, NotChecked=0, Total=16512 [2022-02-16 14:42:18,899 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 3081 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 3598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:18,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 447 Invalid, 3598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3081 Invalid, 0 Unknown, 402 Unchecked, 1.3s Time] [2022-02-16 14:42:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-02-16 14:42:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 677. [2022-02-16 14:42:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.297337278106509) internal successors, (877), 676 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 877 transitions. [2022-02-16 14:42:18,906 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 877 transitions. Word has length 48 [2022-02-16 14:42:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:18,906 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 877 transitions. [2022-02-16 14:42:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 877 transitions. [2022-02-16 14:42:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:18,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:18,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:18,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:19,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:19,115 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1430609053, now seen corresponding path program 77 times [2022-02-16 14:42:19,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:19,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218702184] [2022-02-16 14:42:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:19,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:20,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:20,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218702184] [2022-02-16 14:42:20,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218702184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:20,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510909280] [2022-02-16 14:42:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:42:20,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:20,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:20,050 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:20,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 14:42:20,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:42:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:20,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:42:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:21,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:42:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:21,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:23,136 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:23,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:23,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510909280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:23,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:23,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:42:23,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927842316] [2022-02-16 14:42:23,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:23,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:42:23,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:42:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=4812, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:42:23,367 INFO L87 Difference]: Start difference. First operand 677 states and 877 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:27,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:27,091 INFO L93 Difference]: Finished difference Result 1027 states and 1356 transitions. [2022-02-16 14:42:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:42:27,092 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:27,093 INFO L225 Difference]: With dead ends: 1027 [2022-02-16 14:42:27,093 INFO L226 Difference]: Without dead ends: 1015 [2022-02-16 14:42:27,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=790, Invalid=12092, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:42:27,094 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2948 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:27,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 502 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2948 Invalid, 0 Unknown, 737 Unchecked, 1.2s Time] [2022-02-16 14:42:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-02-16 14:42:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 694. [2022-02-16 14:42:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.2958152958152958) internal successors, (898), 693 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 898 transitions. [2022-02-16 14:42:27,100 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 898 transitions. Word has length 48 [2022-02-16 14:42:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:27,100 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 898 transitions. [2022-02-16 14:42:27,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 898 transitions. [2022-02-16 14:42:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:27,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:27,101 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:27,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:27,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:27,301 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1905087705, now seen corresponding path program 78 times [2022-02-16 14:42:27,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:27,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335855066] [2022-02-16 14:42:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:27,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:28,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:28,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335855066] [2022-02-16 14:42:28,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335855066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:28,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569859399] [2022-02-16 14:42:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:42:28,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:28,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:28,199 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:28,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 14:42:28,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:42:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:28,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:42:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:29,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:29,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:42:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:31,496 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:31,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 122 [2022-02-16 14:42:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:31,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569859399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:31,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:31,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 74 [2022-02-16 14:42:31,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738132233] [2022-02-16 14:42:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:31,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:42:31,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:42:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=5235, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:42:31,673 INFO L87 Difference]: Start difference. First operand 694 states and 898 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:35,677 INFO L93 Difference]: Finished difference Result 1023 states and 1351 transitions. [2022-02-16 14:42:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 14:42:35,677 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:35,678 INFO L225 Difference]: With dead ends: 1023 [2022-02-16 14:42:35,678 INFO L226 Difference]: Without dead ends: 1009 [2022-02-16 14:42:35,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=829, Invalid=13451, Unknown=0, NotChecked=0, Total=14280 [2022-02-16 14:42:35,680 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 109 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 3098 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:35,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 449 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3098 Invalid, 0 Unknown, 435 Unchecked, 1.2s Time] [2022-02-16 14:42:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-16 14:42:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 685. [2022-02-16 14:42:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.2982456140350878) internal successors, (888), 684 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 888 transitions. [2022-02-16 14:42:35,686 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 888 transitions. Word has length 48 [2022-02-16 14:42:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:35,686 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 888 transitions. [2022-02-16 14:42:35,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 888 transitions. [2022-02-16 14:42:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:35,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:35,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:35,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:35,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:35,889 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 871397277, now seen corresponding path program 79 times [2022-02-16 14:42:35,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:35,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266990586] [2022-02-16 14:42:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:35,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:36,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:36,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266990586] [2022-02-16 14:42:36,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266990586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:36,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130464414] [2022-02-16 14:42:36,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:42:36,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:36,828 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:36,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-16 14:42:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:36,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:42:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:38,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:42:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:38,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:40,065 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:40,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:40,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130464414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:40,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:40,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:42:40,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629129910] [2022-02-16 14:42:40,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:42:40,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:42:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=4817, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:42:40,236 INFO L87 Difference]: Start difference. First operand 685 states and 888 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:43,868 INFO L93 Difference]: Finished difference Result 986 states and 1289 transitions. [2022-02-16 14:42:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:42:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:43,869 INFO L225 Difference]: With dead ends: 986 [2022-02-16 14:42:43,869 INFO L226 Difference]: Without dead ends: 974 [2022-02-16 14:42:43,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=748, Invalid=12134, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:42:43,870 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:43,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 439 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2261 Invalid, 0 Unknown, 463 Unchecked, 0.9s Time] [2022-02-16 14:42:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-02-16 14:42:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 694. [2022-02-16 14:42:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.2987012987012987) internal successors, (900), 693 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 900 transitions. [2022-02-16 14:42:43,875 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 900 transitions. Word has length 48 [2022-02-16 14:42:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:43,876 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 900 transitions. [2022-02-16 14:42:43,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 900 transitions. [2022-02-16 14:42:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:43,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:43,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:43,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:44,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:44,077 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 396918625, now seen corresponding path program 80 times [2022-02-16 14:42:44,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:44,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115471524] [2022-02-16 14:42:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:44,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:45,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:45,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115471524] [2022-02-16 14:42:45,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115471524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:45,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938468145] [2022-02-16 14:42:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:42:45,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:45,072 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:45,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-16 14:42:45,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:42:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:45,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:42:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:46,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:46,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:42:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:46,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:48,306 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:48,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:48,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938468145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:48,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:48,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 71 [2022-02-16 14:42:48,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489648081] [2022-02-16 14:42:48,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:48,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:42:48,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:42:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4811, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:42:48,479 INFO L87 Difference]: Start difference. First operand 694 states and 900 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:42:52,134 INFO L93 Difference]: Finished difference Result 990 states and 1293 transitions. [2022-02-16 14:42:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:42:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:42:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:42:52,135 INFO L225 Difference]: With dead ends: 990 [2022-02-16 14:42:52,135 INFO L226 Difference]: Without dead ends: 976 [2022-02-16 14:42:52,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=763, Invalid=12119, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:42:52,137 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 3637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1189 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:42:52,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 461 Invalid, 3637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2372 Invalid, 0 Unknown, 1189 Unchecked, 1.0s Time] [2022-02-16 14:42:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-02-16 14:42:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 694. [2022-02-16 14:42:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.2987012987012987) internal successors, (900), 693 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 900 transitions. [2022-02-16 14:42:52,142 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 900 transitions. Word has length 48 [2022-02-16 14:42:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:42:52,142 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 900 transitions. [2022-02-16 14:42:52,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:42:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 900 transitions. [2022-02-16 14:42:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:42:52,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:42:52,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:42:52,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-16 14:42:52,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-02-16 14:42:52,344 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:42:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:42:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1081038047, now seen corresponding path program 81 times [2022-02-16 14:42:52,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:42:52,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880799937] [2022-02-16 14:42:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:42:52,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:42:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:42:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:53,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:42:53,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880799937] [2022-02-16 14:42:53,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880799937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:42:53,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337104219] [2022-02-16 14:42:53,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:42:53,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:42:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:42:53,272 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:42:53,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-16 14:42:53,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:42:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:42:53,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:42:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:42:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:54,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:42:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:42:54,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:42:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:42:56,731 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:42:56,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:42:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:42:56,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337104219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:42:56,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:42:56,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:42:56,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665668275] [2022-02-16 14:42:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:42:56,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:42:56,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:42:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:42:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=5536, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:42:56,934 INFO L87 Difference]: Start difference. First operand 694 states and 900 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:00,745 INFO L93 Difference]: Finished difference Result 980 states and 1281 transitions. [2022-02-16 14:43:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:43:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:00,746 INFO L225 Difference]: With dead ends: 980 [2022-02-16 14:43:00,746 INFO L226 Difference]: Without dead ends: 962 [2022-02-16 14:43:00,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=777, Invalid=13265, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:43:00,747 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:00,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 410 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2446 Invalid, 0 Unknown, 858 Unchecked, 1.0s Time] [2022-02-16 14:43:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-16 14:43:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 694. [2022-02-16 14:43:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.2972582972582973) internal successors, (899), 693 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 899 transitions. [2022-02-16 14:43:00,752 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 899 transitions. Word has length 48 [2022-02-16 14:43:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:00,752 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 899 transitions. [2022-02-16 14:43:00,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 899 transitions. [2022-02-16 14:43:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:00,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:00,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:00,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:00,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:00,954 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1886656229, now seen corresponding path program 82 times [2022-02-16 14:43:00,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:00,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966429959] [2022-02-16 14:43:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:00,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:01,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:01,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966429959] [2022-02-16 14:43:01,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966429959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:01,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805849011] [2022-02-16 14:43:01,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:43:01,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:01,868 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:01,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-16 14:43:01,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:43:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:01,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:43:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:03,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2022-02-16 14:43:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:03,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:05,105 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:05,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:05,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805849011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:05,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:05,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 71 [2022-02-16 14:43:05,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116900275] [2022-02-16 14:43:05,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:05,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:43:05,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:43:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=4817, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:43:05,300 INFO L87 Difference]: Start difference. First operand 694 states and 899 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:09,106 INFO L93 Difference]: Finished difference Result 1020 states and 1339 transitions. [2022-02-16 14:43:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:43:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:09,108 INFO L225 Difference]: With dead ends: 1020 [2022-02-16 14:43:09,108 INFO L226 Difference]: Without dead ends: 1003 [2022-02-16 14:43:09,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=760, Invalid=11896, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:43:09,110 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 3150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:09,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 419 Invalid, 3150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2840 Invalid, 0 Unknown, 212 Unchecked, 1.2s Time] [2022-02-16 14:43:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-02-16 14:43:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 688. [2022-02-16 14:43:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2983988355167395) internal successors, (892), 687 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 892 transitions. [2022-02-16 14:43:09,117 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 892 transitions. Word has length 48 [2022-02-16 14:43:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:09,117 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 892 transitions. [2022-02-16 14:43:09,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 892 transitions. [2022-02-16 14:43:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:09,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:09,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:09,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-16 14:43:09,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:09,327 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1659773851, now seen corresponding path program 83 times [2022-02-16 14:43:09,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:09,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645133645] [2022-02-16 14:43:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:09,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:10,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:10,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645133645] [2022-02-16 14:43:10,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645133645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:10,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112869141] [2022-02-16 14:43:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:43:10,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:10,269 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:10,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-16 14:43:10,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:43:10,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:10,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:43:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:11,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:11,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:43:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:13,831 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:13,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:14,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112869141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:14,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:14,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:43:14,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669219282] [2022-02-16 14:43:14,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:14,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:43:14,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:43:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5542, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:43:14,037 INFO L87 Difference]: Start difference. First operand 688 states and 892 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:18,171 INFO L93 Difference]: Finished difference Result 1008 states and 1316 transitions. [2022-02-16 14:43:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-16 14:43:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:18,172 INFO L225 Difference]: With dead ends: 1008 [2022-02-16 14:43:18,172 INFO L226 Difference]: Without dead ends: 989 [2022-02-16 14:43:18,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=770, Invalid=13510, Unknown=0, NotChecked=0, Total=14280 [2022-02-16 14:43:18,173 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 3657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:18,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 438 Invalid, 3657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3059 Invalid, 0 Unknown, 515 Unchecked, 1.3s Time] [2022-02-16 14:43:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-16 14:43:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 680. [2022-02-16 14:43:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.2989690721649485) internal successors, (882), 679 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 882 transitions. [2022-02-16 14:43:18,179 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 882 transitions. Word has length 48 [2022-02-16 14:43:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:18,179 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 882 transitions. [2022-02-16 14:43:18,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 882 transitions. [2022-02-16 14:43:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:18,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:18,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:18,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:18,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:18,381 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1123689861, now seen corresponding path program 84 times [2022-02-16 14:43:18,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:18,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955595214] [2022-02-16 14:43:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:18,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:19,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:19,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955595214] [2022-02-16 14:43:19,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955595214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:19,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058648886] [2022-02-16 14:43:19,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:43:19,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:19,271 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:19,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-16 14:43:19,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:43:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:19,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:43:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:20,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:20,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:43:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:20,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:22,740 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:22,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 123 [2022-02-16 14:43:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:22,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058648886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:22,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:22,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2022-02-16 14:43:22,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566637446] [2022-02-16 14:43:22,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:22,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-16 14:43:22,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-16 14:43:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=5377, Unknown=0, NotChecked=0, Total=5700 [2022-02-16 14:43:22,895 INFO L87 Difference]: Start difference. First operand 680 states and 882 transitions. Second operand has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:26,509 INFO L93 Difference]: Finished difference Result 993 states and 1296 transitions. [2022-02-16 14:43:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:43:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:26,510 INFO L225 Difference]: With dead ends: 993 [2022-02-16 14:43:26,510 INFO L226 Difference]: Without dead ends: 981 [2022-02-16 14:43:26,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=714, Invalid=12396, Unknown=0, NotChecked=0, Total=13110 [2022-02-16 14:43:26,511 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 493 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2520 Invalid, 0 Unknown, 618 Unchecked, 1.0s Time] [2022-02-16 14:43:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-02-16 14:43:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 704. [2022-02-16 14:43:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.298719772403983) internal successors, (913), 703 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 913 transitions. [2022-02-16 14:43:26,517 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 913 transitions. Word has length 48 [2022-02-16 14:43:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:26,517 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 913 transitions. [2022-02-16 14:43:26,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 75 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 913 transitions. [2022-02-16 14:43:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:26,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:26,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:26,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:26,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:26,718 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:26,719 INFO L85 PathProgramCache]: Analyzing trace with hash 649211209, now seen corresponding path program 85 times [2022-02-16 14:43:26,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:26,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784027736] [2022-02-16 14:43:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:26,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:27,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:27,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784027736] [2022-02-16 14:43:27,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784027736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:27,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426366783] [2022-02-16 14:43:27,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:43:27,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:27,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:27,607 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:27,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-16 14:43:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:27,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:43:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:28,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:28,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:43:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:29,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:30,813 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:30,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:30,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426366783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:30,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:30,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 71 [2022-02-16 14:43:30,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245116366] [2022-02-16 14:43:30,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:30,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-16 14:43:30,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:30,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-16 14:43:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=4819, Unknown=0, NotChecked=0, Total=5112 [2022-02-16 14:43:30,970 INFO L87 Difference]: Start difference. First operand 704 states and 913 transitions. Second operand has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:34,380 INFO L93 Difference]: Finished difference Result 913 states and 1198 transitions. [2022-02-16 14:43:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-16 14:43:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:34,381 INFO L225 Difference]: With dead ends: 913 [2022-02-16 14:43:34,381 INFO L226 Difference]: Without dead ends: 896 [2022-02-16 14:43:34,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=710, Invalid=11946, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:43:34,382 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 932 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:34,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 446 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2172 Invalid, 0 Unknown, 932 Unchecked, 0.9s Time] [2022-02-16 14:43:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-16 14:43:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 694. [2022-02-16 14:43:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 1.3001443001443) internal successors, (901), 693 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 901 transitions. [2022-02-16 14:43:34,388 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 901 transitions. Word has length 48 [2022-02-16 14:43:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:34,388 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 901 transitions. [2022-02-16 14:43:34,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.75) internal successors, (126), 71 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 901 transitions. [2022-02-16 14:43:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:34,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:34,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:34,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:34,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:34,589 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -828745463, now seen corresponding path program 86 times [2022-02-16 14:43:34,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:34,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515032651] [2022-02-16 14:43:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:34,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:35,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:35,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515032651] [2022-02-16 14:43:35,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515032651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:35,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460255961] [2022-02-16 14:43:35,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:43:35,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:35,483 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:35,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-16 14:43:35,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:43:35,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:35,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:43:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:36,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:43:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:38,855 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:38,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:39,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460255961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:39,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:39,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:43:39,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339626483] [2022-02-16 14:43:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:43:39,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:43:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5542, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:43:39,018 INFO L87 Difference]: Start difference. First operand 694 states and 901 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:42,799 INFO L93 Difference]: Finished difference Result 989 states and 1291 transitions. [2022-02-16 14:43:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:43:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:42,800 INFO L225 Difference]: With dead ends: 989 [2022-02-16 14:43:42,800 INFO L226 Difference]: Without dead ends: 969 [2022-02-16 14:43:42,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=739, Invalid=13303, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:43:42,801 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:42,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 447 Invalid, 3412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2613 Invalid, 0 Unknown, 732 Unchecked, 1.1s Time] [2022-02-16 14:43:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-02-16 14:43:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 692. [2022-02-16 14:43:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2995658465991318) internal successors, (898), 691 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 898 transitions. [2022-02-16 14:43:42,806 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 898 transitions. Word has length 48 [2022-02-16 14:43:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:42,806 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 898 transitions. [2022-02-16 14:43:42,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 898 transitions. [2022-02-16 14:43:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:42,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:42,807 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:42,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:43,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-16 14:43:43,008 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2033574817, now seen corresponding path program 87 times [2022-02-16 14:43:43,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:43,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773663862] [2022-02-16 14:43:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:43,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:43,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:43,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773663862] [2022-02-16 14:43:43,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773663862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:43,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615553571] [2022-02-16 14:43:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:43:43,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:43,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:43,880 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:43,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-16 14:43:43,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:43:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:43,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:43:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:45,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:45,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:45,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:43:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:47,197 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:47,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:47,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615553571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:47,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:47,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 73 [2022-02-16 14:43:47,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480795633] [2022-02-16 14:43:47,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:47,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-16 14:43:47,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-16 14:43:47,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5108, Unknown=0, NotChecked=0, Total=5402 [2022-02-16 14:43:47,389 INFO L87 Difference]: Start difference. First operand 692 states and 898 transitions. Second operand has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:51,020 INFO L93 Difference]: Finished difference Result 978 states and 1278 transitions. [2022-02-16 14:43:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:43:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:51,021 INFO L225 Difference]: With dead ends: 978 [2022-02-16 14:43:51,021 INFO L226 Difference]: Without dead ends: 956 [2022-02-16 14:43:51,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=723, Invalid=12617, Unknown=0, NotChecked=0, Total=13340 [2022-02-16 14:43:51,023 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 123 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 3579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1101 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:51,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 437 Invalid, 3579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2409 Invalid, 0 Unknown, 1101 Unchecked, 1.0s Time] [2022-02-16 14:43:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-16 14:43:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 688. [2022-02-16 14:43:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2983988355167395) internal successors, (892), 687 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 892 transitions. [2022-02-16 14:43:51,028 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 892 transitions. Word has length 48 [2022-02-16 14:43:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:51,028 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 892 transitions. [2022-02-16 14:43:51,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 892 transitions. [2022-02-16 14:43:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:51,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:51,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:51,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-16 14:43:51,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:51,230 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:43:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:43:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash 710086625, now seen corresponding path program 88 times [2022-02-16 14:43:51,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:43:51,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461868382] [2022-02-16 14:43:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:43:51,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:43:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:43:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:52,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:43:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461868382] [2022-02-16 14:43:52,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461868382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:43:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889803346] [2022-02-16 14:43:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:43:52,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:43:52,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:43:52,277 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:43:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-16 14:43:52,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:43:52,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:43:52,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:43:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:43:53,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:43:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:43:53,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:43:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:54,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:43:55,736 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:43:55,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:43:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:43:55,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889803346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:43:55,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:43:55,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:43:55,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897905823] [2022-02-16 14:43:55,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:43:55,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:43:55,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:43:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:43:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=5545, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:43:55,927 INFO L87 Difference]: Start difference. First operand 688 states and 892 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:43:59,851 INFO L93 Difference]: Finished difference Result 979 states and 1278 transitions. [2022-02-16 14:43:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 14:43:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:43:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:43:59,852 INFO L225 Difference]: With dead ends: 979 [2022-02-16 14:43:59,852 INFO L226 Difference]: Without dead ends: 956 [2022-02-16 14:43:59,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=764, Invalid=13756, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:43:59,853 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 3980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:43:59,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 533 Invalid, 3980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2705 Invalid, 0 Unknown, 1198 Unchecked, 1.1s Time] [2022-02-16 14:43:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-16 14:43:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 684. [2022-02-16 14:43:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.2986822840409955) internal successors, (887), 683 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 887 transitions. [2022-02-16 14:43:59,858 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 887 transitions. Word has length 48 [2022-02-16 14:43:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:43:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 887 transitions. [2022-02-16 14:43:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:43:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 887 transitions. [2022-02-16 14:43:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:43:59,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:43:59,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:43:59,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-16 14:44:00,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:00,061 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1362111577, now seen corresponding path program 89 times [2022-02-16 14:44:00,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:00,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030668849] [2022-02-16 14:44:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:00,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:00,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:00,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030668849] [2022-02-16 14:44:00,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030668849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:00,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99068644] [2022-02-16 14:44:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:44:00,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:00,965 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:00,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-16 14:44:00,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:44:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:00,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:44:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:02,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:02,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:44:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:02,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:04,797 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:04,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 123 [2022-02-16 14:44:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:04,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99068644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:04,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:04,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 80 [2022-02-16 14:44:04,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920665605] [2022-02-16 14:44:04,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:04,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-16 14:44:04,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-16 14:44:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=6142, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:44:04,961 INFO L87 Difference]: Start difference. First operand 684 states and 887 transitions. Second operand has 81 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 80 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:09,092 INFO L93 Difference]: Finished difference Result 1024 states and 1346 transitions. [2022-02-16 14:44:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:44:09,092 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 80 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:09,093 INFO L225 Difference]: With dead ends: 1024 [2022-02-16 14:44:09,093 INFO L226 Difference]: Without dead ends: 1000 [2022-02-16 14:44:09,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3378 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=792, Invalid=13970, Unknown=0, NotChecked=0, Total=14762 [2022-02-16 14:44:09,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 3148 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:09,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 451 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3148 Invalid, 0 Unknown, 302 Unchecked, 1.3s Time] [2022-02-16 14:44:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-02-16 14:44:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 682. [2022-02-16 14:44:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.2980910425844348) internal successors, (884), 681 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 884 transitions. [2022-02-16 14:44:09,099 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 884 transitions. Word has length 48 [2022-02-16 14:44:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:09,099 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 884 transitions. [2022-02-16 14:44:09,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.5555555555555556) internal successors, (126), 80 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 884 transitions. [2022-02-16 14:44:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:09,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:09,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:09,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-16 14:44:09,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:09,300 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -630954909, now seen corresponding path program 90 times [2022-02-16 14:44:09,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:09,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200827921] [2022-02-16 14:44:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:09,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:10,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:10,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200827921] [2022-02-16 14:44:10,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200827921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:10,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208172549] [2022-02-16 14:44:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:44:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:10,216 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:10,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-16 14:44:10,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:44:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:10,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:44:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:11,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:11,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:44:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:13,581 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:13,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:44:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:13,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208172549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:13,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:13,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-02-16 14:44:13,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967028480] [2022-02-16 14:44:13,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:13,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:44:13,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:44:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=5249, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:44:13,788 INFO L87 Difference]: Start difference. First operand 682 states and 884 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:17,216 INFO L93 Difference]: Finished difference Result 938 states and 1228 transitions. [2022-02-16 14:44:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:44:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:17,217 INFO L225 Difference]: With dead ends: 938 [2022-02-16 14:44:17,217 INFO L226 Difference]: Without dead ends: 926 [2022-02-16 14:44:17,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=678, Invalid=12204, Unknown=0, NotChecked=0, Total=12882 [2022-02-16 14:44:17,219 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:17,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 551 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2593 Invalid, 0 Unknown, 595 Unchecked, 1.1s Time] [2022-02-16 14:44:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-02-16 14:44:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 698. [2022-02-16 14:44:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.296987087517934) internal successors, (904), 697 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 904 transitions. [2022-02-16 14:44:17,224 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 904 transitions. Word has length 48 [2022-02-16 14:44:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:17,224 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 904 transitions. [2022-02-16 14:44:17,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 904 transitions. [2022-02-16 14:44:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:17,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:17,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:17,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-16 14:44:17,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:17,426 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1105433561, now seen corresponding path program 91 times [2022-02-16 14:44:17,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:17,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807362534] [2022-02-16 14:44:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:17,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:18,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:18,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807362534] [2022-02-16 14:44:18,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807362534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:18,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710119480] [2022-02-16 14:44:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:44:18,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:18,351 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:18,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-16 14:44:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:18,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:44:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:19,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:44:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:20,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:21,642 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:21,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:44:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:21,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710119480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:21,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:21,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 74 [2022-02-16 14:44:21,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094465613] [2022-02-16 14:44:21,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:21,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:44:21,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:44:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=5243, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:44:21,825 INFO L87 Difference]: Start difference. First operand 698 states and 904 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:25,229 INFO L93 Difference]: Finished difference Result 981 states and 1287 transitions. [2022-02-16 14:44:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-16 14:44:25,229 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:25,230 INFO L225 Difference]: With dead ends: 981 [2022-02-16 14:44:25,230 INFO L226 Difference]: Without dead ends: 967 [2022-02-16 14:44:25,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=705, Invalid=12405, Unknown=0, NotChecked=0, Total=13110 [2022-02-16 14:44:25,232 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 3902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1292 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:25,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 511 Invalid, 3902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2533 Invalid, 0 Unknown, 1292 Unchecked, 1.0s Time] [2022-02-16 14:44:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-16 14:44:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 706. [2022-02-16 14:44:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.297872340425532) internal successors, (915), 705 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 915 transitions. [2022-02-16 14:44:25,237 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 915 transitions. Word has length 48 [2022-02-16 14:44:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:25,237 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 915 transitions. [2022-02-16 14:44:25,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 915 transitions. [2022-02-16 14:44:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:25,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:25,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:25,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-16 14:44:25,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:25,439 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1711577063, now seen corresponding path program 92 times [2022-02-16 14:44:25,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:25,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998994529] [2022-02-16 14:44:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:25,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:26,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:26,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998994529] [2022-02-16 14:44:26,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998994529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:26,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113034596] [2022-02-16 14:44:26,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:44:26,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:26,414 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:26,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-16 14:44:26,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:44:26,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:26,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:44:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:27,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:27,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:27,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:44:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:28,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:29,913 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:29,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:44:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:30,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113034596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:30,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:30,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 79 [2022-02-16 14:44:30,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725194447] [2022-02-16 14:44:30,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:30,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-16 14:44:30,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-16 14:44:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=5996, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:44:30,111 INFO L87 Difference]: Start difference. First operand 706 states and 915 transitions. Second operand has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:33,623 INFO L93 Difference]: Finished difference Result 961 states and 1261 transitions. [2022-02-16 14:44:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:44:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:33,624 INFO L225 Difference]: With dead ends: 961 [2022-02-16 14:44:33,624 INFO L226 Difference]: Without dead ends: 941 [2022-02-16 14:44:33,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=720, Invalid=13560, Unknown=0, NotChecked=0, Total=14280 [2022-02-16 14:44:33,625 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:33,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 432 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2518 Invalid, 0 Unknown, 569 Unchecked, 1.0s Time] [2022-02-16 14:44:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-02-16 14:44:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 704. [2022-02-16 14:44:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.2972972972972974) internal successors, (912), 703 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 912 transitions. [2022-02-16 14:44:33,631 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 912 transitions. Word has length 48 [2022-02-16 14:44:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:33,632 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 912 transitions. [2022-02-16 14:44:33,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 912 transitions. [2022-02-16 14:44:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:33,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:33,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:33,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-16 14:44:33,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-16 14:44:33,833 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1027467263, now seen corresponding path program 93 times [2022-02-16 14:44:33,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:33,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742524242] [2022-02-16 14:44:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:33,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:34,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:34,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742524242] [2022-02-16 14:44:34,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742524242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:34,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493359490] [2022-02-16 14:44:34,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:44:34,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:34,754 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:34,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-16 14:44:34,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:44:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:34,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:44:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:36,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:44:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:36,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:38,316 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:38,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 123 [2022-02-16 14:44:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:38,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493359490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:38,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:38,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2022-02-16 14:44:38,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265331114] [2022-02-16 14:44:38,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-16 14:44:38,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-16 14:44:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=5826, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:44:38,505 INFO L87 Difference]: Start difference. First operand 704 states and 912 transitions. Second operand has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:42,016 INFO L93 Difference]: Finished difference Result 970 states and 1270 transitions. [2022-02-16 14:44:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:44:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:42,017 INFO L225 Difference]: With dead ends: 970 [2022-02-16 14:44:42,017 INFO L226 Difference]: Without dead ends: 953 [2022-02-16 14:44:42,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=765, Invalid=13041, Unknown=0, NotChecked=0, Total=13806 [2022-02-16 14:44:42,018 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1034 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:42,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 574 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2445 Invalid, 0 Unknown, 1034 Unchecked, 1.0s Time] [2022-02-16 14:44:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-02-16 14:44:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 705. [2022-02-16 14:44:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.296875) internal successors, (913), 704 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 913 transitions. [2022-02-16 14:44:42,024 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 913 transitions. Word has length 48 [2022-02-16 14:44:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:42,024 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 913 transitions. [2022-02-16 14:44:42,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 78 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 913 transitions. [2022-02-16 14:44:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:42,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:42,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:42,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-16 14:44:42,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-16 14:44:42,225 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 278930047, now seen corresponding path program 94 times [2022-02-16 14:44:42,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:42,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120001416] [2022-02-16 14:44:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:42,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:43,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:43,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120001416] [2022-02-16 14:44:43,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120001416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:43,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339995992] [2022-02-16 14:44:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:44:43,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:43,112 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:43,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-16 14:44:43,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:44:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:43,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:44:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:44,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:44,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:44,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:44:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:44,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:46,552 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:44:46,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:44:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:46,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339995992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:46,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:46,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:44:46,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496270088] [2022-02-16 14:44:46,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:46,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:44:46,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:44:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=5544, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:44:46,818 INFO L87 Difference]: Start difference. First operand 705 states and 913 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:44:50,591 INFO L93 Difference]: Finished difference Result 950 states and 1242 transitions. [2022-02-16 14:44:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:44:50,591 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:44:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:44:50,592 INFO L225 Difference]: With dead ends: 950 [2022-02-16 14:44:50,592 INFO L226 Difference]: Without dead ends: 931 [2022-02-16 14:44:50,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=734, Invalid=13308, Unknown=0, NotChecked=0, Total=14042 [2022-02-16 14:44:50,593 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 2725 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 3784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:44:50,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 455 Invalid, 3784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2725 Invalid, 0 Unknown, 978 Unchecked, 1.1s Time] [2022-02-16 14:44:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-16 14:44:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 704. [2022-02-16 14:44:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.294452347083926) internal successors, (910), 703 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 910 transitions. [2022-02-16 14:44:50,599 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 910 transitions. Word has length 48 [2022-02-16 14:44:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:44:50,599 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 910 transitions. [2022-02-16 14:44:50,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:44:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 910 transitions. [2022-02-16 14:44:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:44:50,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:44:50,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:44:50,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-16 14:44:50,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:50,800 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:44:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:44:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1044558145, now seen corresponding path program 95 times [2022-02-16 14:44:50,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:44:50,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507704905] [2022-02-16 14:44:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:44:50,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:44:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:44:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:51,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:44:51,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507704905] [2022-02-16 14:44:51,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507704905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:44:51,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442059208] [2022-02-16 14:44:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:44:51,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:44:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:44:51,747 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:44:51,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-16 14:44:51,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:44:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:44:51,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-16 14:44:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:44:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:53,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:44:53,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:44:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:53,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:44:56,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:44:56,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:44:56,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 103 [2022-02-16 14:44:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:44:56,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442059208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:44:56,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:44:56,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 89 [2022-02-16 14:44:56,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191485883] [2022-02-16 14:44:56,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:44:56,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-16 14:44:56,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:44:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-16 14:44:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=7281, Unknown=0, NotChecked=0, Total=8010 [2022-02-16 14:44:56,352 INFO L87 Difference]: Start difference. First operand 704 states and 910 transitions. Second operand has 90 states, 90 states have (on average 1.4777777777777779) internal successors, (133), 89 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:05,117 INFO L93 Difference]: Finished difference Result 913 states and 1176 transitions. [2022-02-16 14:45:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-16 14:45:05,117 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.4777777777777779) internal successors, (133), 89 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:05,118 INFO L225 Difference]: With dead ends: 913 [2022-02-16 14:45:05,118 INFO L226 Difference]: Without dead ends: 888 [2022-02-16 14:45:05,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6868 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2736, Invalid=23024, Unknown=0, NotChecked=0, Total=25760 [2022-02-16 14:45:05,119 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 391 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:05,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 492 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 2355 Invalid, 0 Unknown, 613 Unchecked, 1.2s Time] [2022-02-16 14:45:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-02-16 14:45:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 698. [2022-02-16 14:45:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.2955523672883789) internal successors, (903), 697 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 903 transitions. [2022-02-16 14:45:05,125 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 903 transitions. Word has length 48 [2022-02-16 14:45:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:05,125 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 903 transitions. [2022-02-16 14:45:05,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.4777777777777779) internal successors, (133), 89 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 903 transitions. [2022-02-16 14:45:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:05,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:05,126 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:05,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-16 14:45:05,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:05,326 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1326597603, now seen corresponding path program 96 times [2022-02-16 14:45:05,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:05,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771325473] [2022-02-16 14:45:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:05,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:06,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:06,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771325473] [2022-02-16 14:45:06,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771325473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:06,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760508965] [2022-02-16 14:45:06,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:45:06,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:06,245 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:06,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-16 14:45:06,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:45:06,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:45:06,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 62 conjunts are in the unsatisfiable core [2022-02-16 14:45:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:07,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-02-16 14:45:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:07,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:09,533 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:45:09,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:45:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:09,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760508965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:09,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:09,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2022-02-16 14:45:09,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344881887] [2022-02-16 14:45:09,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-16 14:45:09,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-16 14:45:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=5249, Unknown=0, NotChecked=0, Total=5550 [2022-02-16 14:45:09,679 INFO L87 Difference]: Start difference. First operand 698 states and 903 transitions. Second operand has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:13,022 INFO L93 Difference]: Finished difference Result 940 states and 1229 transitions. [2022-02-16 14:45:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-16 14:45:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:13,023 INFO L225 Difference]: With dead ends: 940 [2022-02-16 14:45:13,024 INFO L226 Difference]: Without dead ends: 918 [2022-02-16 14:45:13,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=724, Invalid=12616, Unknown=0, NotChecked=0, Total=13340 [2022-02-16 14:45:13,025 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:13,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 460 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2229 Invalid, 0 Unknown, 684 Unchecked, 0.9s Time] [2022-02-16 14:45:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-02-16 14:45:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 688. [2022-02-16 14:45:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2983988355167395) internal successors, (892), 687 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 892 transitions. [2022-02-16 14:45:13,031 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 892 transitions. Word has length 48 [2022-02-16 14:45:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:13,031 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 892 transitions. [2022-02-16 14:45:13,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.68) internal successors, (126), 74 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 892 transitions. [2022-02-16 14:45:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:13,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:13,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:13,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-16 14:45:13,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-16 14:45:13,233 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2663207, now seen corresponding path program 97 times [2022-02-16 14:45:13,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:13,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325443860] [2022-02-16 14:45:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:13,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:14,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:14,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325443860] [2022-02-16 14:45:14,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325443860] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:14,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697037144] [2022-02-16 14:45:14,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:45:14,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:14,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:14,152 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:14,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-16 14:45:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:14,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:45:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:15,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:15,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:45:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:15,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:17,524 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:45:17,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:45:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:17,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697037144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:17,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:17,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 28] total 76 [2022-02-16 14:45:17,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597817526] [2022-02-16 14:45:17,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:17,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:45:17,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:45:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=5544, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:45:17,706 INFO L87 Difference]: Start difference. First operand 688 states and 892 transitions. Second operand has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:21,240 INFO L93 Difference]: Finished difference Result 927 states and 1214 transitions. [2022-02-16 14:45:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-16 14:45:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:21,241 INFO L225 Difference]: With dead ends: 927 [2022-02-16 14:45:21,241 INFO L226 Difference]: Without dead ends: 903 [2022-02-16 14:45:21,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3091 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=708, Invalid=12864, Unknown=0, NotChecked=0, Total=13572 [2022-02-16 14:45:21,242 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:21,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 362 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2415 Invalid, 0 Unknown, 313 Unchecked, 1.0s Time] [2022-02-16 14:45:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-02-16 14:45:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 686. [2022-02-16 14:45:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.2978102189781022) internal successors, (889), 685 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 889 transitions. [2022-02-16 14:45:21,249 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 889 transitions. Word has length 48 [2022-02-16 14:45:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 889 transitions. [2022-02-16 14:45:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.6363636363636365) internal successors, (126), 76 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 889 transitions. [2022-02-16 14:45:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:21,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:21,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:21,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-16 14:45:21,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:21,451 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash -73589017, now seen corresponding path program 98 times [2022-02-16 14:45:21,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:21,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982182643] [2022-02-16 14:45:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:21,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:22,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:22,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982182643] [2022-02-16 14:45:22,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982182643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:22,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935204979] [2022-02-16 14:45:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:45:22,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:22,446 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:22,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-16 14:45:22,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:45:22,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:45:22,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:45:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:23,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:23,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:45:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:26,018 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:45:26,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 120 [2022-02-16 14:45:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:26,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935204979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:26,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:26,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 79 [2022-02-16 14:45:26,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583627365] [2022-02-16 14:45:26,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:26,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-16 14:45:26,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-16 14:45:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=5999, Unknown=0, NotChecked=0, Total=6320 [2022-02-16 14:45:26,222 INFO L87 Difference]: Start difference. First operand 686 states and 889 transitions. Second operand has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:29,116 INFO L93 Difference]: Finished difference Result 809 states and 1065 transitions. [2022-02-16 14:45:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-16 14:45:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:29,117 INFO L225 Difference]: With dead ends: 809 [2022-02-16 14:45:29,117 INFO L226 Difference]: Without dead ends: 783 [2022-02-16 14:45:29,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=676, Invalid=11980, Unknown=0, NotChecked=0, Total=12656 [2022-02-16 14:45:29,119 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 436 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1918 Invalid, 0 Unknown, 497 Unchecked, 0.8s Time] [2022-02-16 14:45:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-02-16 14:45:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 684. [2022-02-16 14:45:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.2972181551976574) internal successors, (886), 683 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 886 transitions. [2022-02-16 14:45:29,125 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 886 transitions. Word has length 48 [2022-02-16 14:45:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:29,125 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 886 transitions. [2022-02-16 14:45:29,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.575) internal successors, (126), 79 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 886 transitions. [2022-02-16 14:45:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:29,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:29,126 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:29,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-16 14:45:29,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:29,326 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2055435137, now seen corresponding path program 99 times [2022-02-16 14:45:29,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:29,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958562095] [2022-02-16 14:45:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:30,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:30,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958562095] [2022-02-16 14:45:30,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958562095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:30,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749587396] [2022-02-16 14:45:30,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:45:30,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:30,146 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:30,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-16 14:45:30,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:45:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:45:30,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:45:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:31,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:31,400 INFO L353 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2022-02-16 14:45:31,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2022-02-16 14:45:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:32,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:34,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:34,657 INFO L353 Elim1Store]: treesize reduction 22, result has 70.7 percent of original size [2022-02-16 14:45:34,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 88 [2022-02-16 14:45:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:34,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749587396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:34,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:34,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 76 [2022-02-16 14:45:34,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620524125] [2022-02-16 14:45:34,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:34,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-16 14:45:34,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-16 14:45:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=5290, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:45:34,916 INFO L87 Difference]: Start difference. First operand 684 states and 886 transitions. Second operand has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:38,150 INFO L93 Difference]: Finished difference Result 806 states and 1045 transitions. [2022-02-16 14:45:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 14:45:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:38,151 INFO L225 Difference]: With dead ends: 806 [2022-02-16 14:45:38,151 INFO L226 Difference]: Without dead ends: 782 [2022-02-16 14:45:38,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1339, Invalid=13181, Unknown=0, NotChecked=0, Total=14520 [2022-02-16 14:45:38,153 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:38,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 368 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1069 Invalid, 0 Unknown, 512 Unchecked, 0.4s Time] [2022-02-16 14:45:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-02-16 14:45:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 707. [2022-02-16 14:45:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 1.291784702549575) internal successors, (912), 706 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 912 transitions. [2022-02-16 14:45:38,158 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 912 transitions. Word has length 48 [2022-02-16 14:45:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 912 transitions. [2022-02-16 14:45:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 912 transitions. [2022-02-16 14:45:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:38,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:38,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:38,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-16 14:45:38,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-16 14:45:38,359 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1580956485, now seen corresponding path program 100 times [2022-02-16 14:45:38,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:38,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414100999] [2022-02-16 14:45:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:38,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:39,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:39,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414100999] [2022-02-16 14:45:39,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414100999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:39,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090525479] [2022-02-16 14:45:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:45:39,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:39,339 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:39,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-16 14:45:39,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:45:39,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:45:39,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-16 14:45:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:40,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:40,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:40,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:40,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:40,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2022-02-16 14:45:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:40,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:42,370 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:45:42,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 122 [2022-02-16 14:45:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:42,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090525479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:42,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:42,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 26] total 72 [2022-02-16 14:45:42,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803150808] [2022-02-16 14:45:42,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:42,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-16 14:45:42,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-16 14:45:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=4945, Unknown=0, NotChecked=0, Total=5256 [2022-02-16 14:45:42,544 INFO L87 Difference]: Start difference. First operand 707 states and 912 transitions. Second operand has 73 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 72 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:45:47,746 INFO L93 Difference]: Finished difference Result 1143 states and 1488 transitions. [2022-02-16 14:45:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-16 14:45:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 72 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-02-16 14:45:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:45:47,747 INFO L225 Difference]: With dead ends: 1143 [2022-02-16 14:45:47,747 INFO L226 Difference]: Without dead ends: 1115 [2022-02-16 14:45:47,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4646 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1252, Invalid=17930, Unknown=0, NotChecked=0, Total=19182 [2022-02-16 14:45:47,749 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 191 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 4317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:47,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 488 Invalid, 4317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 4053 Invalid, 0 Unknown, 100 Unchecked, 1.6s Time] [2022-02-16 14:45:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-02-16 14:45:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 727. [2022-02-16 14:45:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.2920110192837466) internal successors, (938), 726 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 938 transitions. [2022-02-16 14:45:47,756 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 938 transitions. Word has length 48 [2022-02-16 14:45:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:45:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 938 transitions. [2022-02-16 14:45:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 72 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:45:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 938 transitions. [2022-02-16 14:45:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-16 14:45:47,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:45:47,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:45:47,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-16 14:45:47,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-16 14:45:47,971 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:45:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:45:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 62474171, now seen corresponding path program 101 times [2022-02-16 14:45:47,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:45:47,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344673606] [2022-02-16 14:45:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:45:47,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:45:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:45:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:48,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:45:48,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344673606] [2022-02-16 14:45:48,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344673606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:45:48,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909541652] [2022-02-16 14:45:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:45:48,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:45:48,826 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:45:48,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-16 14:45:48,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:45:48,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:45:48,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-16 14:45:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:45:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:45:50,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2022-02-16 14:45:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:45:52,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:45:52,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:45:52,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 97 [2022-02-16 14:45:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:45:53,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909541652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:45:53,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:45:53,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 78 [2022-02-16 14:45:53,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979437356] [2022-02-16 14:45:53,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:45:53,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-16 14:45:53,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:45:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-16 14:45:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2022-02-16 14:45:53,213 INFO L87 Difference]: Start difference. First operand 727 states and 938 transitions. Second operand has 79 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 78 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-16 14:45:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:45:55,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=811, Invalid=9089, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:45:55,108 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:45:55,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 193 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 714 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2022-02-16 14:45:55,109 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 14:45:55,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-16 14:45:55,130 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:45:55,135 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:45:55,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:45:55,310 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (727states) and FLOYD_HOARE automaton (currently 35 states, 79 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 100 known predicates. [2022-02-16 14:45:55,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 14:45:55,311 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 14:45:55,313 INFO L732 BasicCegarLoop]: Path program histogram: [101, 3, 1] [2022-02-16 14:45:55,314 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:45:55,314 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:45:55,317 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:45:55 BasicIcfg [2022-02-16 14:45:55,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:45:55,317 INFO L158 Benchmark]: Toolchain (without parser) took 716745.92ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 882.9MB). Free memory was 152.4MB in the beginning and 442.7MB in the end (delta: -290.3MB). Peak memory consumption was 592.8MB. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 190.8MB. Free memory is still 153.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.35ms. Allocated memory is still 190.8MB. Free memory was 152.4MB in the beginning and 150.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L158 Benchmark]: Boogie Preprocessor took 12.15ms. Allocated memory is still 190.8MB. Free memory was 150.8MB in the beginning and 149.9MB in the end (delta: 981.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L158 Benchmark]: RCFGBuilder took 197.35ms. Allocated memory is still 190.8MB. Free memory was 149.8MB in the beginning and 140.5MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L158 Benchmark]: TraceAbstraction took 716501.04ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 882.9MB). Free memory was 140.0MB in the beginning and 442.7MB in the end (delta: -302.7MB). Peak memory consumption was 580.2MB. Max. memory is 8.0GB. [2022-02-16 14:45:55,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 190.8MB. Free memory is still 153.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.35ms. Allocated memory is still 190.8MB. Free memory was 152.4MB in the beginning and 150.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.15ms. Allocated memory is still 190.8MB. Free memory was 150.8MB in the beginning and 149.9MB in the end (delta: 981.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 197.35ms. Allocated memory is still 190.8MB. Free memory was 149.8MB in the beginning and 140.5MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 716501.04ms. Allocated memory was 190.8MB in the beginning and 1.1GB in the end (delta: 882.9MB). Free memory was 140.0MB in the beginning and 442.7MB in the end (delta: -302.7MB). Peak memory consumption was 580.2MB. 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 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (727states) and FLOYD_HOARE automaton (currently 35 states, 79 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 100 known predicates. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (727states) and FLOYD_HOARE automaton (currently 35 states, 79 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 100 known predicates. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (727states) and FLOYD_HOARE automaton (currently 35 states, 79 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 100 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 716.4s, OverallIterations: 105, TraceHistogramMax: 4, PathProgramHistogramMax: 101, EmptinessCheckTime: 0.4s, AutomataDifference: 314.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, PartialOrderReductionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13008 SdHoareTripleChecker+Valid, 91.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13008 mSDsluCounter, 43377 SdHoareTripleChecker+Invalid, 77.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 38252 IncrementalHoareTripleChecker+Unchecked, 57762 mSDsCounter, 9005 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 218757 IncrementalHoareTripleChecker+Invalid, 266014 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9005 mSolverCounterUnsat, 2169 mSDtfsCounter, 218757 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15207 GetRequests, 4492 SyntacticMatches, 637 SemanticMatches, 10077 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259964 ImplicationChecksByTransitivity, 448.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35439occurred in iteration=0, InterpolantAutomatonStates: 5154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 104 MinimizatonAttempts, 39684 StatesRemovedByMinimization, 104 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 373.2s InterpolantComputationTime, 8930 NumberOfCodeBlocks, 8930 NumberOfCodeBlocksAsserted, 366 NumberOfCheckSat, 13063 ConstructedInterpolants, 920 QuantifiedInterpolants, 373186 SizeOfPredicates, 1419 NumberOfNonLiveVariables, 10116 ConjunctsInSsa, 5546 ConjunctsInUnsatCore, 311 InterpolantComputations, 2 PerfectInterpolantSequences, 163/11383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown