/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:41:23,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:41:23,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:41:23,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:41:23,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:41:23,286 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:41:23,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:41:23,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:41:23,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:41:23,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:41:23,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:41:23,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:41:23,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:41:23,288 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:41:23,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:41:23,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:41:23,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:41:23,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:41:23,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:41:23,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:41:23,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:41:23,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:41:23,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:41:23,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:41:23,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:41:23,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:41:23,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:41:23,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:41:23,495 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:41:23,496 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:41:23,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2022-03-15 16:41:23,497 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2022-03-15 16:41:23,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:41:23,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:41:23,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:41:23,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:41:23,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:41:23,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,531 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:41:23,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:41:23,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:41:23,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:41:23,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:41:23,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:41:23,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:41:23,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:41:23,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:41:23,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/1) ... [2022-03-15 16:41:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:41:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:23,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:41:23,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:41:23,633 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:41:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:41:23,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:41:23,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:41:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:41:23,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:41:23,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:41:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:41:23,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:41:23,635 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:41:23,669 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:41:23,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:41:23,782 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:41:23,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:41:23,792 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:41:23,794 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:41:23 BoogieIcfgContainer [2022-03-15 16:41:23,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:41:23,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:41:23,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:41:23,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:41:23,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:41:23" (1/2) ... [2022-03-15 16:41:23,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1907a21d and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:41:23, skipping insertion in model container [2022-03-15 16:41:23,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:41:23" (2/2) ... [2022-03-15 16:41:23,808 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2022-03-15 16:41:23,812 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:41:23,812 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:41:23,813 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:41:23,813 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:41:23,863 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:41:23,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:41:23,910 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:41:23,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:41:23,919 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 16:41:23,940 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 16:41:23,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:23,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:23,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-03-15 16:41:23,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:23,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231124660] [2022-03-15 16:41:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:24,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231124660] [2022-03-15 16:41:24,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231124660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:41:24,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:41:24,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:41:24,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448672383] [2022-03-15 16:41:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:41:24,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:41:24,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:41:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:41:24,139 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:24,186 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-03-15 16:41:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:41:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 16:41:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:24,194 INFO L225 Difference]: With dead ends: 104 [2022-03-15 16:41:24,194 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 16:41:24,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:41:24,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:24,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:41:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 16:41:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-03-15 16:41:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-03-15 16:41:24,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-03-15 16:41:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:24,266 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-03-15 16:41:24,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-03-15 16:41:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:41:24,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:24,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:24,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:41:24,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-03-15 16:41:24,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:24,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106859308] [2022-03-15 16:41:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:24,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106859308] [2022-03-15 16:41:24,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106859308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:41:24,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:41:24,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:41:24,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566149155] [2022-03-15 16:41:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:41:24,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:41:24,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:41:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:41:24,342 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:24,370 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-03-15 16:41:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:41:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:41:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:24,379 INFO L225 Difference]: With dead ends: 91 [2022-03-15 16:41:24,379 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 16:41:24,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:41:24,381 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:24,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:41:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 16:41:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-15 16:41:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-03-15 16:41:24,389 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-03-15 16:41:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:24,390 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-03-15 16:41:24,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-03-15 16:41:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:41:24,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:24,391 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] [2022-03-15 16:41:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:41:24,392 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-03-15 16:41:24,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:24,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089341726] [2022-03-15 16:41:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:24,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089341726] [2022-03-15 16:41:24,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089341726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:24,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285196225] [2022-03-15 16:41:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:24,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:24,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:41:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:24,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:41:24,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:24,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 16:41:24,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:41:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:25,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:25,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-15 16:41:25,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:25,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285196225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:25,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:25,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-15 16:41:25,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018040158] [2022-03-15 16:41:25,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:25,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:41:25,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:41:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:41:25,108 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:25,216 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-03-15 16:41:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:41:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:41:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:25,220 INFO L225 Difference]: With dead ends: 154 [2022-03-15 16:41:25,221 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 16:41:25,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:41:25,223 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:25,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:41:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 16:41:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-03-15 16:41:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-03-15 16:41:25,232 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-03-15 16:41:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:25,232 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-03-15 16:41:25,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-03-15 16:41:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:41:25,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:25,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:25,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:25,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:25,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-03-15 16:41:25,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:25,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435506803] [2022-03-15 16:41:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:25,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:25,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:25,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435506803] [2022-03-15 16:41:25,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435506803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:25,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624424579] [2022-03-15 16:41:25,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:25,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:41:25,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:41:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:25,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:25,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624424579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:25,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:25,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-15 16:41:25,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881765481] [2022-03-15 16:41:25,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:41:25,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:41:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:41:25,750 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:25,805 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-03-15 16:41:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:41:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:41:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:25,807 INFO L225 Difference]: With dead ends: 284 [2022-03-15 16:41:25,807 INFO L226 Difference]: Without dead ends: 264 [2022-03-15 16:41:25,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:41:25,808 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:25,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:41:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-15 16:41:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-03-15 16:41:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-03-15 16:41:25,820 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-03-15 16:41:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:25,820 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-03-15 16:41:25,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-03-15 16:41:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:25,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:25,822 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] [2022-03-15 16:41:25,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 16:41:26,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 16:41:26,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-03-15 16:41:26,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:26,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868140075] [2022-03-15 16:41:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:26,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:26,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868140075] [2022-03-15 16:41:26,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868140075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:26,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436001799] [2022-03-15 16:41:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:26,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:26,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:41:26,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:26,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:41:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:26,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:26,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2022-03-15 16:41:26,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:26,774 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 20 treesize of output 38 [2022-03-15 16:41:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:26,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:27,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:27,716 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 31 treesize of output 45 [2022-03-15 16:41:27,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:27,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436001799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:27,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:27,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-03-15 16:41:27,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222803173] [2022-03-15 16:41:27,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:27,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:41:27,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:41:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:41:27,805 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:28,604 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-03-15 16:41:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:41:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:28,606 INFO L225 Difference]: With dead ends: 536 [2022-03-15 16:41:28,606 INFO L226 Difference]: Without dead ends: 533 [2022-03-15 16:41:28,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:41:28,608 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:28,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-03-15 16:41:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-15 16:41:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-03-15 16:41:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-03-15 16:41:28,620 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-03-15 16:41:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:28,620 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-03-15 16:41:28,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-03-15 16:41:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:28,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:28,622 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] [2022-03-15 16:41:28,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:28,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:28,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-03-15 16:41:28,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:28,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764027331] [2022-03-15 16:41:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:28,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:29,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:29,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764027331] [2022-03-15 16:41:29,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764027331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:29,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458693795] [2022-03-15 16:41:29,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:29,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:29,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:29,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:29,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:41:29,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:29,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:29,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:29,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:29,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2022-03-15 16:41:29,491 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:41:29,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:41:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:29,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:29,849 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:29,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:29,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:29,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458693795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:29,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:29,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-03-15 16:41:29,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890794493] [2022-03-15 16:41:29,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:41:29,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:41:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:41:29,995 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:30,638 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-03-15 16:41:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:41:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:30,641 INFO L225 Difference]: With dead ends: 546 [2022-03-15 16:41:30,641 INFO L226 Difference]: Without dead ends: 529 [2022-03-15 16:41:30,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:41:30,644 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:30,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-03-15 16:41:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-15 16:41:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-03-15 16:41:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-03-15 16:41:30,659 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-03-15 16:41:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:30,661 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-03-15 16:41:30,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-03-15 16:41:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:30,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:30,665 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] [2022-03-15 16:41:30,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:30,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:30,883 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-03-15 16:41:30,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:30,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759953457] [2022-03-15 16:41:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:31,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:31,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759953457] [2022-03-15 16:41:31,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759953457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:31,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313342910] [2022-03-15 16:41:31,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:31,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:31,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:31,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:31,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:41:31,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:31,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:31,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:41:31,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:31,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:31,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-03-15 16:41:31,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:31,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:31,584 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 22 treesize of output 10 [2022-03-15 16:41:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:31,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:31,859 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:31,862 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 35 treesize of output 57 [2022-03-15 16:41:31,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:32,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313342910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:32,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:32,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-15 16:41:32,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387348880] [2022-03-15 16:41:32,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:32,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:41:32,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:41:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:41:32,017 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:32,183 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-03-15 16:41:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:41:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:32,185 INFO L225 Difference]: With dead ends: 554 [2022-03-15 16:41:32,185 INFO L226 Difference]: Without dead ends: 527 [2022-03-15 16:41:32,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:41:32,186 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:32,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-15 16:41:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-15 16:41:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-03-15 16:41:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-03-15 16:41:32,195 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-03-15 16:41:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:32,195 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-03-15 16:41:32,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-03-15 16:41:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:32,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:32,196 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] [2022-03-15 16:41:32,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:32,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:32,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-03-15 16:41:32,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:32,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371458890] [2022-03-15 16:41:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:32,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:32,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371458890] [2022-03-15 16:41:32,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371458890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:32,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215287949] [2022-03-15 16:41:32,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:32,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:32,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:32,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:41:32,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:32,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:41:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:33,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:33,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-03-15 16:41:33,048 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:41:33,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:41:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:33,328 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:33,328 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 35 treesize of output 57 [2022-03-15 16:41:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:33,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215287949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:33,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:33,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 31 [2022-03-15 16:41:33,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910820072] [2022-03-15 16:41:33,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:33,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:41:33,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:41:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:33,442 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:34,475 INFO L93 Difference]: Finished difference Result 1062 states and 2281 transitions. [2022-03-15 16:41:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:41:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:34,479 INFO L225 Difference]: With dead ends: 1062 [2022-03-15 16:41:34,479 INFO L226 Difference]: Without dead ends: 957 [2022-03-15 16:41:34,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=640, Invalid=3520, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:41:34,481 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 266 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:34,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 503 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2022-03-15 16:41:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-15 16:41:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 421. [2022-03-15 16:41:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.164285714285714) internal successors, (909), 420 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 909 transitions. [2022-03-15 16:41:34,502 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 909 transitions. Word has length 32 [2022-03-15 16:41:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:34,502 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 909 transitions. [2022-03-15 16:41:34,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 909 transitions. [2022-03-15 16:41:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:34,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:34,503 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] [2022-03-15 16:41:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:34,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:34,719 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash 326619495, now seen corresponding path program 7 times [2022-03-15 16:41:34,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:34,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556012496] [2022-03-15 16:41:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:34,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:34,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556012496] [2022-03-15 16:41:34,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556012496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344549064] [2022-03-15 16:41:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:34,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:34,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:41:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:35,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:35,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:41:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:35,379 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 24 treesize of output 10 [2022-03-15 16:41:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:35,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:35,659 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:35,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:35,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:35,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344549064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:35,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:35,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-15 16:41:35,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655407824] [2022-03-15 16:41:35,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:35,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:41:35,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:41:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:41:35,821 INFO L87 Difference]: Start difference. First operand 421 states and 909 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:35,986 INFO L93 Difference]: Finished difference Result 700 states and 1493 transitions. [2022-03-15 16:41:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:41:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:36,005 INFO L225 Difference]: With dead ends: 700 [2022-03-15 16:41:36,005 INFO L226 Difference]: Without dead ends: 677 [2022-03-15 16:41:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:41:36,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 115 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 183 Invalid, 0 Unknown, 193 Unchecked, 0.1s Time] [2022-03-15 16:41:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-15 16:41:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 476. [2022-03-15 16:41:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.1789473684210527) internal successors, (1035), 475 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1035 transitions. [2022-03-15 16:41:36,016 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1035 transitions. Word has length 32 [2022-03-15 16:41:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:36,016 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1035 transitions. [2022-03-15 16:41:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1035 transitions. [2022-03-15 16:41:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:36,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:36,017 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] [2022-03-15 16:41:36,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:36,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:36,233 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1152993301, now seen corresponding path program 8 times [2022-03-15 16:41:36,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:36,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211935945] [2022-03-15 16:41:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:36,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:36,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:36,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211935945] [2022-03-15 16:41:36,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211935945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:36,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932837058] [2022-03-15 16:41:36,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:36,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:36,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:36,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:36,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:41:36,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:36,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:36,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:41:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:36,811 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 24 treesize of output 10 [2022-03-15 16:41:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:36,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:37,165 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:37,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:37,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:37,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932837058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:37,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:37,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 29 [2022-03-15 16:41:37,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424063931] [2022-03-15 16:41:37,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:37,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:37,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:37,290 INFO L87 Difference]: Start difference. First operand 476 states and 1035 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:37,833 INFO L93 Difference]: Finished difference Result 820 states and 1757 transitions. [2022-03-15 16:41:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:41:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:37,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:37,837 INFO L225 Difference]: With dead ends: 820 [2022-03-15 16:41:37,837 INFO L226 Difference]: Without dead ends: 796 [2022-03-15 16:41:37,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:41:37,840 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:37,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 171 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 455 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-03-15 16:41:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-03-15 16:41:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 538. [2022-03-15 16:41:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.189944134078212) internal successors, (1176), 537 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1176 transitions. [2022-03-15 16:41:37,854 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1176 transitions. Word has length 32 [2022-03-15 16:41:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:37,854 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1176 transitions. [2022-03-15 16:41:37,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1176 transitions. [2022-03-15 16:41:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:37,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:37,855 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] [2022-03-15 16:41:37,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:38,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:41:38,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash 591370705, now seen corresponding path program 9 times [2022-03-15 16:41:38,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:38,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43944525] [2022-03-15 16:41:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:38,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:38,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43944525] [2022-03-15 16:41:38,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43944525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:38,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850843298] [2022-03-15 16:41:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:38,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:38,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:38,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:41:38,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:38,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:41:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:38,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:38,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-03-15 16:41:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:38,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:38,793 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-03-15 16:41:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:39,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:39,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:39,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:39,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2022-03-15 16:41:39,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-15 16:41:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:39,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850843298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:39,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:39,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2022-03-15 16:41:39,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387315888] [2022-03-15 16:41:39,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:39,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:41:39,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:41:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:41:39,754 INFO L87 Difference]: Start difference. First operand 538 states and 1176 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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) [2022-03-15 16:41:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:40,522 INFO L93 Difference]: Finished difference Result 1123 states and 2407 transitions. [2022-03-15 16:41:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:41:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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 32 [2022-03-15 16:41:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:40,526 INFO L225 Difference]: With dead ends: 1123 [2022-03-15 16:41:40,526 INFO L226 Difference]: Without dead ends: 1091 [2022-03-15 16:41:40,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:41:40,527 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:40,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 228 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 310 Invalid, 0 Unknown, 495 Unchecked, 0.1s Time] [2022-03-15 16:41:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-03-15 16:41:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 695. [2022-03-15 16:41:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.2002881844380404) internal successors, (1527), 694 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1527 transitions. [2022-03-15 16:41:40,542 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1527 transitions. Word has length 32 [2022-03-15 16:41:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:40,542 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1527 transitions. [2022-03-15 16:41:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 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) [2022-03-15 16:41:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1527 transitions. [2022-03-15 16:41:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:40,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:40,543 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] [2022-03-15 16:41:40,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:40,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:40,759 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 10 times [2022-03-15 16:41:40,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:40,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588299738] [2022-03-15 16:41:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:40,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:40,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588299738] [2022-03-15 16:41:40,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588299738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:40,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043720497] [2022-03-15 16:41:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:40,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:40,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:40,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:40,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:41:41,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:41,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:41,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:41,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:41:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:41,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:41,407 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 24 treesize of output 10 [2022-03-15 16:41:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:41,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:41,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:41,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:41,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043720497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:41,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:41,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:41,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267595176] [2022-03-15 16:41:41,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:41,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:41,813 INFO L87 Difference]: Start difference. First operand 695 states and 1527 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:42,062 INFO L93 Difference]: Finished difference Result 845 states and 1844 transitions. [2022-03-15 16:41:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:41:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:42,065 INFO L225 Difference]: With dead ends: 845 [2022-03-15 16:41:42,065 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 16:41:42,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:41:42,066 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:42,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 179 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2022-03-15 16:41:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 16:41:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 715. [2022-03-15 16:41:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.200280112044818) internal successors, (1571), 714 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1571 transitions. [2022-03-15 16:41:42,076 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1571 transitions. Word has length 32 [2022-03-15 16:41:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:42,077 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1571 transitions. [2022-03-15 16:41:42,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1571 transitions. [2022-03-15 16:41:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:42,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:42,078 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] [2022-03-15 16:41:42,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-15 16:41:42,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 16:41:42,296 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 11 times [2022-03-15 16:41:42,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:42,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465336114] [2022-03-15 16:41:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:42,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:42,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465336114] [2022-03-15 16:41:42,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465336114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:42,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608516914] [2022-03-15 16:41:42,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:42,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:42,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:42,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:42,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:41:42,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:41:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:42,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:42,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-03-15 16:41:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:42,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:41:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:43,140 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:43,140 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 35 treesize of output 57 [2022-03-15 16:41:43,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:43,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608516914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:43,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:43,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:43,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756031711] [2022-03-15 16:41:43,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:43,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:43,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:43,272 INFO L87 Difference]: Start difference. First operand 715 states and 1571 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:43,629 INFO L93 Difference]: Finished difference Result 1089 states and 2383 transitions. [2022-03-15 16:41:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:41:43,629 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:43,632 INFO L225 Difference]: With dead ends: 1089 [2022-03-15 16:41:43,632 INFO L226 Difference]: Without dead ends: 1056 [2022-03-15 16:41:43,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:41:43,634 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:43,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 166 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 248 Invalid, 0 Unknown, 200 Unchecked, 0.1s Time] [2022-03-15 16:41:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-15 16:41:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 781. [2022-03-15 16:41:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.198717948717949) internal successors, (1715), 780 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1715 transitions. [2022-03-15 16:41:43,648 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1715 transitions. Word has length 32 [2022-03-15 16:41:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1715 transitions. [2022-03-15 16:41:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1715 transitions. [2022-03-15 16:41:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:43,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:43,650 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] [2022-03-15 16:41:43,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:43,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:41:43,870 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 12 times [2022-03-15 16:41:43,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:43,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562560290] [2022-03-15 16:41:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:44,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562560290] [2022-03-15 16:41:44,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562560290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:44,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359428056] [2022-03-15 16:41:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:44,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:44,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:41:44,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:41:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:44,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:44,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:41:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:44,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:44,395 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 22 treesize of output 10 [2022-03-15 16:41:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:44,654 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:44,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 16:41:44,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:44,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359428056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:44,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:44,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:44,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97732803] [2022-03-15 16:41:44,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:44,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:44,761 INFO L87 Difference]: Start difference. First operand 781 states and 1715 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:45,128 INFO L93 Difference]: Finished difference Result 919 states and 1994 transitions. [2022-03-15 16:41:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:41:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:45,136 INFO L225 Difference]: With dead ends: 919 [2022-03-15 16:41:45,137 INFO L226 Difference]: Without dead ends: 889 [2022-03-15 16:41:45,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:41:45,137 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:45,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 138 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2022-03-15 16:41:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-15 16:41:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 796. [2022-03-15 16:41:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.1962264150943396) internal successors, (1746), 795 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1746 transitions. [2022-03-15 16:41:45,161 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1746 transitions. Word has length 32 [2022-03-15 16:41:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:45,161 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1746 transitions. [2022-03-15 16:41:45,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1746 transitions. [2022-03-15 16:41:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:45,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:45,162 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] [2022-03-15 16:41:45,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:45,375 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 [2022-03-15 16:41:45,376 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1624569289, now seen corresponding path program 13 times [2022-03-15 16:41:45,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:45,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019125968] [2022-03-15 16:41:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:45,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:45,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:45,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019125968] [2022-03-15 16:41:45,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019125968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:45,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775931587] [2022-03-15 16:41:45,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:45,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:45,600 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:45,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:41:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:45,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:45,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:41:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:45,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:45,964 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 24 treesize of output 10 [2022-03-15 16:41:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:46,209 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:46,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:46,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:46,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775931587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:46,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:46,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:46,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552011125] [2022-03-15 16:41:46,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:46,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:46,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:46,301 INFO L87 Difference]: Start difference. First operand 796 states and 1746 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:46,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:46,491 INFO L93 Difference]: Finished difference Result 933 states and 2020 transitions. [2022-03-15 16:41:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:41:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:46,494 INFO L225 Difference]: With dead ends: 933 [2022-03-15 16:41:46,494 INFO L226 Difference]: Without dead ends: 914 [2022-03-15 16:41:46,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:41:46,496 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:46,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 130 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 186 Unchecked, 0.1s Time] [2022-03-15 16:41:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-03-15 16:41:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 816. [2022-03-15 16:41:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.1950920245398775) internal successors, (1789), 815 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1789 transitions. [2022-03-15 16:41:46,509 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1789 transitions. Word has length 32 [2022-03-15 16:41:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1789 transitions. [2022-03-15 16:41:46,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1789 transitions. [2022-03-15 16:41:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:46,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:46,510 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] [2022-03-15 16:41:46,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:46,725 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 [2022-03-15 16:41:46,725 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -49390293, now seen corresponding path program 14 times [2022-03-15 16:41:46,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:46,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274362237] [2022-03-15 16:41:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:46,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:46,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:46,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274362237] [2022-03-15 16:41:46,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274362237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:46,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198296149] [2022-03-15 16:41:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:46,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:46,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:46,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:46,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:41:47,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:47,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:41:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:47,302 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 24 treesize of output 10 [2022-03-15 16:41:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:47,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:47,533 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:47,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:47,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:47,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198296149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:47,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:47,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:47,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693671844] [2022-03-15 16:41:47,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:47,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:47,628 INFO L87 Difference]: Start difference. First operand 816 states and 1789 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:47,902 INFO L93 Difference]: Finished difference Result 1323 states and 2899 transitions. [2022-03-15 16:41:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:41:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:47,906 INFO L225 Difference]: With dead ends: 1323 [2022-03-15 16:41:47,906 INFO L226 Difference]: Without dead ends: 1284 [2022-03-15 16:41:47,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:41:47,907 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 80 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:47,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 240 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 282 Invalid, 0 Unknown, 319 Unchecked, 0.1s Time] [2022-03-15 16:41:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-15 16:41:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 891. [2022-03-15 16:41:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.210112359550562) internal successors, (1967), 890 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1967 transitions. [2022-03-15 16:41:47,929 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1967 transitions. Word has length 32 [2022-03-15 16:41:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1967 transitions. [2022-03-15 16:41:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1967 transitions. [2022-03-15 16:41:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:47,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:47,931 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] [2022-03-15 16:41:47,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:48,146 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 [2022-03-15 16:41:48,147 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:48,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash -870567031, now seen corresponding path program 15 times [2022-03-15 16:41:48,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:48,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928153231] [2022-03-15 16:41:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:48,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:48,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928153231] [2022-03-15 16:41:48,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928153231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:48,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473000482] [2022-03-15 16:41:48,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:48,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:48,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:41:48,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:41:48,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:48,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:48,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2022-03-15 16:41:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:48,654 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 22 treesize of output 10 [2022-03-15 16:41:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:48,971 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:48,971 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 35 treesize of output 57 [2022-03-15 16:41:49,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:49,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473000482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:49,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:49,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-15 16:41:49,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640753745] [2022-03-15 16:41:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:49,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:41:49,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:41:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:41:49,087 INFO L87 Difference]: Start difference. First operand 891 states and 1967 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:49,350 INFO L93 Difference]: Finished difference Result 1063 states and 2311 transitions. [2022-03-15 16:41:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:41:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:49,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:49,353 INFO L225 Difference]: With dead ends: 1063 [2022-03-15 16:41:49,353 INFO L226 Difference]: Without dead ends: 1041 [2022-03-15 16:41:49,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:41:49,354 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:49,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 215 Unchecked, 0.1s Time] [2022-03-15 16:41:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-03-15 16:41:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 900. [2022-03-15 16:41:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.2102335928809786) internal successors, (1987), 899 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1987 transitions. [2022-03-15 16:41:49,366 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1987 transitions. Word has length 32 [2022-03-15 16:41:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:49,366 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1987 transitions. [2022-03-15 16:41:49,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1987 transitions. [2022-03-15 16:41:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:49,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:49,368 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] [2022-03-15 16:41:49,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-15 16:41:49,583 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 [2022-03-15 16:41:49,583 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash 144956493, now seen corresponding path program 16 times [2022-03-15 16:41:49,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:49,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739420169] [2022-03-15 16:41:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:49,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:49,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739420169] [2022-03-15 16:41:49,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739420169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:49,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203971681] [2022-03-15 16:41:49,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:49,868 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:49,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:41:49,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:50,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:50,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:41:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:50,271 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 24 treesize of output 10 [2022-03-15 16:41:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:50,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:50,557 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:50,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:50,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:50,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203971681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:50,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:50,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-03-15 16:41:50,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355611789] [2022-03-15 16:41:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:41:50,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:41:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:41:50,720 INFO L87 Difference]: Start difference. First operand 900 states and 1987 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:51,367 INFO L93 Difference]: Finished difference Result 1406 states and 3081 transitions. [2022-03-15 16:41:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:41:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:51,371 INFO L225 Difference]: With dead ends: 1406 [2022-03-15 16:41:51,371 INFO L226 Difference]: Without dead ends: 1345 [2022-03-15 16:41:51,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=1887, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:41:51,372 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:51,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 320 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 589 Invalid, 0 Unknown, 431 Unchecked, 0.3s Time] [2022-03-15 16:41:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-03-15 16:41:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1005. [2022-03-15 16:41:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.208167330677291) internal successors, (2217), 1004 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2217 transitions. [2022-03-15 16:41:51,386 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2217 transitions. Word has length 32 [2022-03-15 16:41:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:51,386 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 2217 transitions. [2022-03-15 16:41:51,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2217 transitions. [2022-03-15 16:41:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:51,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:51,389 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] [2022-03-15 16:41:51,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:51,604 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 [2022-03-15 16:41:51,605 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1878987469, now seen corresponding path program 17 times [2022-03-15 16:41:51,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:51,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119916682] [2022-03-15 16:41:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:51,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:51,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119916682] [2022-03-15 16:41:51,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119916682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:51,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362609256] [2022-03-15 16:41:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:41:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:51,844 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:41:51,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:41:51,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:51,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:41:51,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:52,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:52,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 16:41:52,088 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:41:52,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 16:41:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:52,306 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:52,306 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 35 treesize of output 57 [2022-03-15 16:41:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:52,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362609256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:52,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:52,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 33 [2022-03-15 16:41:52,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069037791] [2022-03-15 16:41:52,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:52,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:41:52,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:41:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:41:52,459 INFO L87 Difference]: Start difference. First operand 1005 states and 2217 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:53,300 INFO L93 Difference]: Finished difference Result 2645 states and 5825 transitions. [2022-03-15 16:41:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:41:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:53,307 INFO L225 Difference]: With dead ends: 2645 [2022-03-15 16:41:53,308 INFO L226 Difference]: Without dead ends: 2463 [2022-03-15 16:41:53,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=3095, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:41:53,309 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 280 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:53,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 249 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 772 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-03-15 16:41:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-03-15 16:41:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 893. [2022-03-15 16:41:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.1939461883408073) internal successors, (1957), 892 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1957 transitions. [2022-03-15 16:41:53,329 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1957 transitions. Word has length 32 [2022-03-15 16:41:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:53,329 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1957 transitions. [2022-03-15 16:41:53,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1957 transitions. [2022-03-15 16:41:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:53,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:53,330 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] [2022-03-15 16:41:53,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:53,546 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 [2022-03-15 16:41:53,547 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1685265873, now seen corresponding path program 18 times [2022-03-15 16:41:53,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:53,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051544663] [2022-03-15 16:41:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:53,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:53,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051544663] [2022-03-15 16:41:53,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051544663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:53,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648676158] [2022-03-15 16:41:53,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:53,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:53,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:53,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:41:53,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:53,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:41:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:54,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:54,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2022-03-15 16:41:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:54,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:54,161 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 22 treesize of output 10 [2022-03-15 16:41:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:54,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:54,350 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:54,350 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 35 treesize of output 57 [2022-03-15 16:41:54,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:54,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648676158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:54,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:54,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-15 16:41:54,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119798280] [2022-03-15 16:41:54,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:54,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:41:54,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:41:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:41:54,451 INFO L87 Difference]: Start difference. First operand 893 states and 1957 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:54,767 INFO L93 Difference]: Finished difference Result 1110 states and 2407 transitions. [2022-03-15 16:41:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:41:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:54,770 INFO L225 Difference]: With dead ends: 1110 [2022-03-15 16:41:54,770 INFO L226 Difference]: Without dead ends: 1094 [2022-03-15 16:41:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:41:54,771 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:54,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 181 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 182 Unchecked, 0.1s Time] [2022-03-15 16:41:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-03-15 16:41:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 913. [2022-03-15 16:41:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.191885964912281) internal successors, (1999), 912 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1999 transitions. [2022-03-15 16:41:54,793 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1999 transitions. Word has length 32 [2022-03-15 16:41:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:54,793 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1999 transitions. [2022-03-15 16:41:54,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1999 transitions. [2022-03-15 16:41:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:54,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:54,795 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] [2022-03-15 16:41:54,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:55,011 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 [2022-03-15 16:41:55,012 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 711401639, now seen corresponding path program 19 times [2022-03-15 16:41:55,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:55,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010560773] [2022-03-15 16:41:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:55,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:55,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010560773] [2022-03-15 16:41:55,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010560773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:55,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747972068] [2022-03-15 16:41:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:41:55,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:55,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:55,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:41:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:55,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:55,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 16:41:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:55,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:55,612 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 24 treesize of output 10 [2022-03-15 16:41:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:55,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:55,871 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:55,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:55,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:55,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747972068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:55,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:55,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 27 [2022-03-15 16:41:55,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557995059] [2022-03-15 16:41:55,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:55,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:41:55,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:55,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:41:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:41:55,984 INFO L87 Difference]: Start difference. First operand 913 states and 1999 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:56,199 INFO L93 Difference]: Finished difference Result 1125 states and 2432 transitions. [2022-03-15 16:41:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:41:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:56,202 INFO L225 Difference]: With dead ends: 1125 [2022-03-15 16:41:56,202 INFO L226 Difference]: Without dead ends: 1109 [2022-03-15 16:41:56,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:41:56,204 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:56,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 167 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 316 Unchecked, 0.1s Time] [2022-03-15 16:41:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-15 16:41:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 907. [2022-03-15 16:41:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.1942604856512142) internal successors, (1988), 906 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1988 transitions. [2022-03-15 16:41:56,217 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1988 transitions. Word has length 32 [2022-03-15 16:41:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:56,217 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1988 transitions. [2022-03-15 16:41:56,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1988 transitions. [2022-03-15 16:41:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:56,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:56,219 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] [2022-03-15 16:41:56,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:56,432 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 [2022-03-15 16:41:56,432 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:56,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:56,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 20 times [2022-03-15 16:41:56,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:56,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478984540] [2022-03-15 16:41:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:56,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:56,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:56,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478984540] [2022-03-15 16:41:56,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478984540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:56,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74384686] [2022-03-15 16:41:56,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:41:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:56,637 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:56,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:41:56,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:41:56,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 16:41:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:56,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:56,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 16:41:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:56,996 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 24 treesize of output 10 [2022-03-15 16:41:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:57,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:57,243 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:57,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 16:41:57,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-15 16:41:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:57,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74384686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:57,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:57,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-15 16:41:57,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250274123] [2022-03-15 16:41:57,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:57,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:41:57,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:41:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:41:57,387 INFO L87 Difference]: Start difference. First operand 907 states and 1988 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:57,615 INFO L93 Difference]: Finished difference Result 1224 states and 2644 transitions. [2022-03-15 16:41:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:41:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:41:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:57,619 INFO L225 Difference]: With dead ends: 1224 [2022-03-15 16:41:57,619 INFO L226 Difference]: Without dead ends: 1159 [2022-03-15 16:41:57,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:41:57,620 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 209 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:57,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 251 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 260 Invalid, 0 Unknown, 750 Unchecked, 0.1s Time] [2022-03-15 16:41:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-03-15 16:41:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 954. [2022-03-15 16:41:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 2.2014690451206715) internal successors, (2098), 953 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2098 transitions. [2022-03-15 16:41:57,643 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2098 transitions. Word has length 32 [2022-03-15 16:41:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:57,643 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 2098 transitions. [2022-03-15 16:41:57,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2098 transitions. [2022-03-15 16:41:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:41:57,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:57,645 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] [2022-03-15 16:41:57,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 16:41:57,847 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 [2022-03-15 16:41:57,847 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:41:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash -640059635, now seen corresponding path program 21 times [2022-03-15 16:41:57,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:57,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523969815] [2022-03-15 16:41:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:41:58,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:58,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523969815] [2022-03-15 16:41:58,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523969815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:58,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970374230] [2022-03-15 16:41:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:41:58,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:58,042 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:58,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:41:58,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:41:58,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:41:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:58,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 16:41:58,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,410 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 20 treesize of output 38 [2022-03-15 16:41:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:58,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-15 16:55:58,109 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 16:55:58,111 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:55:58,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:55:58,144 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:55:58,146 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:55:58,311 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 [2022-03-15 16:55:58,311 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. [2022-03-15 16:55:58,313 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:55:58,313 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:55:58,314 INFO L732 BasicCegarLoop]: Path program histogram: [21, 1, 1] [2022-03-15 16:55:58,316 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:55:58,316 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:55:58,317 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:55:58 BasicIcfg [2022-03-15 16:55:58,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:55:58,317 INFO L158 Benchmark]: Toolchain (without parser) took 874803.91ms. Allocated memory was 189.8MB in the beginning and 341.8MB in the end (delta: 152.0MB). Free memory was 149.0MB in the beginning and 272.3MB in the end (delta: -123.3MB). Peak memory consumption was 200.4MB. Max. memory is 8.0GB. [2022-03-15 16:55:58,317 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 189.8MB. Free memory is still 150.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:55:58,317 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.30ms. Allocated memory is still 189.8MB. Free memory was 149.0MB in the beginning and 147.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:55:58,318 INFO L158 Benchmark]: Boogie Preprocessor took 10.94ms. Allocated memory is still 189.8MB. Free memory was 147.4MB in the beginning and 146.5MB in the end (delta: 916.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:55:58,318 INFO L158 Benchmark]: RCFGBuilder took 249.55ms. Allocated memory is still 189.8MB. Free memory was 146.3MB in the beginning and 137.1MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:55:58,318 INFO L158 Benchmark]: TraceAbstraction took 874518.92ms. Allocated memory was 189.8MB in the beginning and 341.8MB in the end (delta: 152.0MB). Free memory was 136.6MB in the beginning and 272.3MB in the end (delta: -135.6MB). Peak memory consumption was 187.8MB. Max. memory is 8.0GB. [2022-03-15 16:55:58,318 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 0.10ms. Allocated memory is still 189.8MB. Free memory is still 150.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.30ms. Allocated memory is still 189.8MB. Free memory was 149.0MB in the beginning and 147.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.94ms. Allocated memory is still 189.8MB. Free memory was 147.4MB in the beginning and 146.5MB in the end (delta: 916.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 249.55ms. Allocated memory is still 189.8MB. Free memory was 146.3MB in the beginning and 137.1MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 874518.92ms. Allocated memory was 189.8MB in the beginning and 341.8MB in the end (delta: 152.0MB). Free memory was 136.6MB in the beginning and 272.3MB in the end (delta: -135.6MB). Peak memory consumption was 187.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 874.4s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2644 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2644 mSDsluCounter, 3912 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5046 IncrementalHoareTripleChecker+Unchecked, 5401 mSDsCounter, 650 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6522 IncrementalHoareTripleChecker+Invalid, 12218 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 650 mSolverCounterUnsat, 519 mSDtfsCounter, 6522 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1832 GetRequests, 1001 SyntacticMatches, 54 SemanticMatches, 777 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12147 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1005occurred in iteration=18, InterpolantAutomatonStates: 545, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 5776 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 1284 NumberOfCodeBlocks, 1284 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1848 ConstructedInterpolants, 260 QuantifiedInterpolants, 21255 SizeOfPredicates, 331 NumberOfNonLiveVariables, 1331 ConjunctsInSsa, 417 ConjunctsInUnsatCore, 62 InterpolantComputations, 2 PerfectInterpolantSequences, 48/730 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