/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/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:21:19,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:21:19,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:21:19,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:21:19,265 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 16:21:19,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:21:19,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:21:19,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:21:19,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:21:19,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:21:19,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:21:19,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:21:19,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:21:19,291 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:21:19,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:21:19,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:21:19,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:21:19,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:21:19,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:21:19,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:21:19,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:21:19,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:21:19,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:21:19,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:21:19,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:21:19,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:21:19,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:21:19,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:21:19,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:21:19,295 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:21:19,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:21:19,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:21:19,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:21:19,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:21:19,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:21:19,499 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:21:19,499 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:21:19,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2022-03-15 16:21:19,501 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2022-03-15 16:21:19,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:21:19,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:21:19,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:21:19,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:21:19,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:21:19,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,541 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:21:19,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:21:19,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:21:19,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:21:19,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:21:19,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:21:19,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:21:19,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:21:19,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:21:19,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/1) ... [2022-03-15 16:21:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:21:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:19,581 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 16:21:19,583 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 16:21:19,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:21:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:21:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:21:19,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:21:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:21:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:21:19,607 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:21:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:21:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:21:19,608 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 16:21:19,641 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:21:19,642 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:21:19,704 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:21:19,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:21:19,714 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 16:21:19,715 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-15 16:21:19,716 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:21:19 BoogieIcfgContainer [2022-03-15 16:21:19,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:21:19,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:21:19,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:21:19,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:21:19,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:21:19" (1/2) ... [2022-03-15 16:21:19,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c1280c and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:21:19, skipping insertion in model container [2022-03-15 16:21:19,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:21:19" (2/2) ... [2022-03-15 16:21:19,738 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2022-03-15 16:21:19,742 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:21:19,742 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:21:19,742 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:21:19,742 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:21:19,764 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:21:19,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:21:19,815 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 16:21:19,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:21:19,822 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2022-03-15 16:21:19,833 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 16:21:19,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:19,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:19,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash -603576974, now seen corresponding path program 1 times [2022-03-15 16:21:19,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:19,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242353245] [2022-03-15 16:21:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:19,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:19,970 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 16:21:19,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:19,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242353245] [2022-03-15 16:21:19,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242353245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:21:19,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:21:19,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:21:19,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421650239] [2022-03-15 16:21:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:21:19,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:21:19,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:21:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:21:19,997 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:20,024 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2022-03-15 16:21:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:21:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 16:21:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:20,032 INFO L225 Difference]: With dead ends: 42 [2022-03-15 16:21:20,032 INFO L226 Difference]: Without dead ends: 30 [2022-03-15 16:21:20,034 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 16:21:20,036 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:20,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-15 16:21:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-15 16:21:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 16:21:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2022-03-15 16:21:20,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2022-03-15 16:21:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:20,085 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2022-03-15 16:21:20,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2022-03-15 16:21:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 16:21:20,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:20,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:20,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:21:20,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash -978133573, now seen corresponding path program 1 times [2022-03-15 16:21:20,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:20,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938068499] [2022-03-15 16:21:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:20,116 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 16:21:20,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:20,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938068499] [2022-03-15 16:21:20,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938068499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:21:20,117 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:21:20,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:21:20,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967115658] [2022-03-15 16:21:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:21:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:21:20,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:21:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:21:20,119 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:20,130 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2022-03-15 16:21:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:21:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 16:21:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:20,131 INFO L225 Difference]: With dead ends: 32 [2022-03-15 16:21:20,131 INFO L226 Difference]: Without dead ends: 31 [2022-03-15 16:21:20,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:21:20,132 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:20,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-15 16:21:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-15 16:21:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2022-03-15 16:21:20,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2022-03-15 16:21:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2022-03-15 16:21:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2022-03-15 16:21:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 16:21:20,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:20,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:20,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:21:20,139 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1451787426, now seen corresponding path program 1 times [2022-03-15 16:21:20,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:20,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641136025] [2022-03-15 16:21:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:20,224 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 16:21:20,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:20,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641136025] [2022-03-15 16:21:20,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641136025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:20,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797829047] [2022-03-15 16:21:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:20,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:20,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:20,229 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 16:21:20,247 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 16:21:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:21:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:20,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:21:20,403 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 16:21:20,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:20,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:21:20,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 24 [2022-03-15 16:21:20,584 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 16:21:20,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797829047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:20,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:20,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 16:21:20,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833047295] [2022-03-15 16:21:20,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:21:20,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:21:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:21:20,588 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:20,659 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2022-03-15 16:21:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:21:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 16:21:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:20,661 INFO L225 Difference]: With dead ends: 52 [2022-03-15 16:21:20,661 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 16:21:20,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:21:20,664 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:20,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 72 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 16:21:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-15 16:21:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2022-03-15 16:21:20,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2022-03-15 16:21:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:20,683 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2022-03-15 16:21:20,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2022-03-15 16:21:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 16:21:20,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:20,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:20,703 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 16:21:20,891 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 16:21:20,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash -552180542, now seen corresponding path program 1 times [2022-03-15 16:21:20,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:20,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978335761] [2022-03-15 16:21:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:20,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:21:20,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:20,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978335761] [2022-03-15 16:21:20,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978335761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:21:20,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:21:20,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:21:20,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126667373] [2022-03-15 16:21:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:21:20,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:21:20,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:21:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:21:20,909 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:20,928 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2022-03-15 16:21:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:21:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 16:21:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:20,929 INFO L225 Difference]: With dead ends: 40 [2022-03-15 16:21:20,929 INFO L226 Difference]: Without dead ends: 40 [2022-03-15 16:21:20,929 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 16:21:20,930 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:20,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-15 16:21:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-03-15 16:21:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2022-03-15 16:21:20,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2022-03-15 16:21:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:20,933 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2022-03-15 16:21:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2022-03-15 16:21:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:21:20,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:20,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:20,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:21:20,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1885895719, now seen corresponding path program 2 times [2022-03-15 16:21:20,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:20,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161263546] [2022-03-15 16:21:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:20,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:20,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161263546] [2022-03-15 16:21:20,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161263546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:21:20,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:21:20,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:21:20,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775510329] [2022-03-15 16:21:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:21:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:21:20,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:21:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:21:20,974 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:20,999 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2022-03-15 16:21:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:21:20,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:21:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:21,002 INFO L225 Difference]: With dead ends: 86 [2022-03-15 16:21:21,002 INFO L226 Difference]: Without dead ends: 84 [2022-03-15 16:21:21,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:21:21,004 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:21,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-15 16:21:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2022-03-15 16:21:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2022-03-15 16:21:21,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2022-03-15 16:21:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:21,018 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2022-03-15 16:21:21,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2022-03-15 16:21:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:21:21,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:21,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:21,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:21:21,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2121429846, now seen corresponding path program 3 times [2022-03-15 16:21:21,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:21,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642850487] [2022-03-15 16:21:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:21:21,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:21,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642850487] [2022-03-15 16:21:21,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642850487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:21,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968619321] [2022-03-15 16:21:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:21,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:21,063 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 16:21:21,064 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 16:21:21,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:21:21,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:21,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:21:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:21:21,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:21:21,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968619321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:21,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:21,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 16:21:21,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224157728] [2022-03-15 16:21:21,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:21:21,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:21:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:21:21,159 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:21,180 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2022-03-15 16:21:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:21:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 16:21:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:21,181 INFO L225 Difference]: With dead ends: 79 [2022-03-15 16:21:21,181 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 16:21:21,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:21:21,182 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:21,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 16:21:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-03-15 16:21:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2022-03-15 16:21:21,186 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2022-03-15 16:21:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:21,186 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2022-03-15 16:21:21,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2022-03-15 16:21:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:21:21,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:21,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:21,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:21,398 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,SelfDestructingSolverStorable5 [2022-03-15 16:21:21,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash 169569482, now seen corresponding path program 1 times [2022-03-15 16:21:21,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:21,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319964957] [2022-03-15 16:21:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:21,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:21,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319964957] [2022-03-15 16:21:21,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319964957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:21,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823468293] [2022-03-15 16:21:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:21,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:21,527 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 16:21:21,528 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 16:21:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:21:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:21,719 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 37 treesize of output 19 [2022-03-15 16:21:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:21,881 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:21,882 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 40 treesize of output 58 [2022-03-15 16:21:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:21,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823468293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:21,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:21,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:21:21,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157643867] [2022-03-15 16:21:21,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:21,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:21:21,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:21:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:21:21,995 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:22,086 INFO L93 Difference]: Finished difference Result 114 states and 236 transitions. [2022-03-15 16:21:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:21:22,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 16:21:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:22,087 INFO L225 Difference]: With dead ends: 114 [2022-03-15 16:21:22,087 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 16:21:22,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:21:22,088 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 83 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-03-15 16:21:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 16:21:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2022-03-15 16:21:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2022-03-15 16:21:22,098 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2022-03-15 16:21:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2022-03-15 16:21:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2022-03-15 16:21:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:21:22,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:22,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:22,118 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 16:21:22,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:22,316 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2094263290, now seen corresponding path program 2 times [2022-03-15 16:21:22,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:22,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834807872] [2022-03-15 16:21:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:22,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:22,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834807872] [2022-03-15 16:21:22,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834807872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:22,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892586838] [2022-03-15 16:21:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:22,412 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 16:21:22,413 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 16:21:22,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:21:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:22,534 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:21:22,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2022-03-15 16:21:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:22,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:22,677 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:22,678 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 40 treesize of output 58 [2022-03-15 16:21:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:22,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892586838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:22,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:22,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 16:21:22,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610261261] [2022-03-15 16:21:22,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:22,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:21:22,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:21:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:21:22,810 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:22,873 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2022-03-15 16:21:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:21:22,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 16:21:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:22,874 INFO L225 Difference]: With dead ends: 111 [2022-03-15 16:21:22,874 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 16:21:22,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:21:22,875 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:22,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 126 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:21:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 16:21:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-03-15 16:21:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2022-03-15 16:21:22,879 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2022-03-15 16:21:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:22,879 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2022-03-15 16:21:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2022-03-15 16:21:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:21:22,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:22,880 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:22,899 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 16:21:23,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:23,096 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash 327811023, now seen corresponding path program 3 times [2022-03-15 16:21:23,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:23,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914529839] [2022-03-15 16:21:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:23,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:23,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:23,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914529839] [2022-03-15 16:21:23,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914529839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:23,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220631584] [2022-03-15 16:21:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:23,137 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 16:21:23,139 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 16:21:23,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:21:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:21:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:23,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:23,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220631584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:23,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:23,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:21:23,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048424749] [2022-03-15 16:21:23,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:23,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:21:23,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:21:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:21:23,231 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:23,250 INFO L93 Difference]: Finished difference Result 181 states and 351 transitions. [2022-03-15 16:21:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:21:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:21:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:23,251 INFO L225 Difference]: With dead ends: 181 [2022-03-15 16:21:23,251 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 16:21:23,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:21:23,253 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:23,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 16:21:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 106. [2022-03-15 16:21:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 220 transitions. [2022-03-15 16:21:23,269 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 220 transitions. Word has length 20 [2022-03-15 16:21:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:23,270 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 220 transitions. [2022-03-15 16:21:23,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 220 transitions. [2022-03-15 16:21:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:21:23,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:23,273 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:23,290 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 16:21:23,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:23,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1610697433, now seen corresponding path program 4 times [2022-03-15 16:21:23,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:23,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634576666] [2022-03-15 16:21:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:23,573 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 16:21:23,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634576666] [2022-03-15 16:21:23,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634576666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6968094] [2022-03-15 16:21:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:21:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:23,575 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 16:21:23,576 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 16:21:23,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:21:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:21:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:23,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:23,758 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 37 treesize of output 19 [2022-03-15 16:21:23,776 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 16:21:23,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:23,915 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:21:23,915 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 40 treesize of output 58 [2022-03-15 16:21:24,033 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 16:21:24,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6968094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:24,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:24,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:21:24,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529266393] [2022-03-15 16:21:24,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:24,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:21:24,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:21:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:21:24,036 INFO L87 Difference]: Start difference. First operand 106 states and 220 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:24,117 INFO L93 Difference]: Finished difference Result 169 states and 355 transitions. [2022-03-15 16:21:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:21:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:21:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:24,119 INFO L225 Difference]: With dead ends: 169 [2022-03-15 16:21:24,119 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 16:21:24,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-03-15 16:21:24,119 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:24,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 93 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-03-15 16:21:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 16:21:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 100. [2022-03-15 16:21:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2022-03-15 16:21:24,123 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 22 [2022-03-15 16:21:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:24,123 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2022-03-15 16:21:24,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2022-03-15 16:21:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:21:24,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:24,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:24,143 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 16:21:24,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:24,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash -476045102, now seen corresponding path program 5 times [2022-03-15 16:21:24,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:24,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821611620] [2022-03-15 16:21:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:24,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:24,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:24,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821611620] [2022-03-15 16:21:24,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821611620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:24,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611890802] [2022-03-15 16:21:24,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:21:24,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:24,480 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 16:21:24,499 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 16:21:24,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:21:24,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:21:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:24,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:24,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:24,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2022-03-15 16:21:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:24,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:24,988 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:24,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:21:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:25,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611890802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:25,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:25,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:21:25,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903081109] [2022-03-15 16:21:25,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:25,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:21:25,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:21:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:21:25,163 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:25,539 INFO L93 Difference]: Finished difference Result 568 states and 1167 transitions. [2022-03-15 16:21:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:21:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:21:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:25,541 INFO L225 Difference]: With dead ends: 568 [2022-03-15 16:21:25,541 INFO L226 Difference]: Without dead ends: 359 [2022-03-15 16:21:25,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:21:25,542 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 243 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:25,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 282 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 235 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-15 16:21:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-15 16:21:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 156. [2022-03-15 16:21:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.232258064516129) internal successors, (346), 155 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 346 transitions. [2022-03-15 16:21:25,547 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 346 transitions. Word has length 23 [2022-03-15 16:21:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:25,547 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 346 transitions. [2022-03-15 16:21:25,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 346 transitions. [2022-03-15 16:21:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:21:25,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:25,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:25,565 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 16:21:25,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:25,759 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1438145602, now seen corresponding path program 6 times [2022-03-15 16:21:25,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:25,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147634442] [2022-03-15 16:21:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:25,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:25,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147634442] [2022-03-15 16:21:25,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147634442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:25,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123864728] [2022-03-15 16:21:25,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:25,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:25,872 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 16:21:25,873 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 16:21:25,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:21:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:21:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:26,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:26,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-03-15 16:21:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:26,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:26,341 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:26,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:21:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:26,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123864728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:26,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:26,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 16:21:26,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661542256] [2022-03-15 16:21:26,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:26,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:21:26,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:21:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:21:26,529 INFO L87 Difference]: Start difference. First operand 156 states and 346 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:26,702 INFO L93 Difference]: Finished difference Result 304 states and 663 transitions. [2022-03-15 16:21:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:21:26,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:21:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:26,704 INFO L225 Difference]: With dead ends: 304 [2022-03-15 16:21:26,704 INFO L226 Difference]: Without dead ends: 274 [2022-03-15 16:21:26,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:21:26,705 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:26,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 281 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-03-15 16:21:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-15 16:21:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 166. [2022-03-15 16:21:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.16969696969697) internal successors, (358), 165 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 358 transitions. [2022-03-15 16:21:26,709 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 358 transitions. Word has length 23 [2022-03-15 16:21:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 358 transitions. [2022-03-15 16:21:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 358 transitions. [2022-03-15 16:21:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:21:26,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:26,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:26,729 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 16:21:26,910 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,SelfDestructingSolverStorable11 [2022-03-15 16:21:26,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 983926786, now seen corresponding path program 7 times [2022-03-15 16:21:26,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:26,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680965055] [2022-03-15 16:21:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:27,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:27,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680965055] [2022-03-15 16:21:27,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680965055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:27,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838108940] [2022-03-15 16:21:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:27,056 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 16:21:27,056 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 16:21:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:21:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:27,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-03-15 16:21:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:27,497 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:27,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:21:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:27,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838108940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:27,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:27,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:21:27,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179612995] [2022-03-15 16:21:27,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:27,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:21:27,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:21:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:21:27,692 INFO L87 Difference]: Start difference. First operand 166 states and 358 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:28,116 INFO L93 Difference]: Finished difference Result 629 states and 1277 transitions. [2022-03-15 16:21:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:21:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:21:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:28,118 INFO L225 Difference]: With dead ends: 629 [2022-03-15 16:21:28,118 INFO L226 Difference]: Without dead ends: 415 [2022-03-15 16:21:28,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:21:28,119 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 209 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:28,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 422 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-15 16:21:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-15 16:21:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 193. [2022-03-15 16:21:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1770833333333335) internal successors, (418), 192 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 418 transitions. [2022-03-15 16:21:28,124 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 418 transitions. Word has length 23 [2022-03-15 16:21:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:28,124 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 418 transitions. [2022-03-15 16:21:28,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 418 transitions. [2022-03-15 16:21:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:21:28,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:28,125 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:28,158 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 16:21:28,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:21:28,339 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1396849806, now seen corresponding path program 8 times [2022-03-15 16:21:28,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:28,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18892823] [2022-03-15 16:21:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:28,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:28,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18892823] [2022-03-15 16:21:28,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18892823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:28,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410107804] [2022-03-15 16:21:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:28,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:28,472 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 16:21:28,474 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 16:21:28,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:21:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:28,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:28,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2022-03-15 16:21:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:28,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:28,935 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:28,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:21:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:29,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410107804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:29,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:29,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:21:29,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995782769] [2022-03-15 16:21:29,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:29,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:21:29,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:21:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:21:29,145 INFO L87 Difference]: Start difference. First operand 193 states and 418 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:29,500 INFO L93 Difference]: Finished difference Result 452 states and 974 transitions. [2022-03-15 16:21:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:21:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:21:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:29,501 INFO L225 Difference]: With dead ends: 452 [2022-03-15 16:21:29,501 INFO L226 Difference]: Without dead ends: 387 [2022-03-15 16:21:29,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:21:29,502 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:29,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 355 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 267 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-03-15 16:21:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-15 16:21:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 152. [2022-03-15 16:21:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0728476821192054) internal successors, (313), 151 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 313 transitions. [2022-03-15 16:21:29,507 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 313 transitions. Word has length 23 [2022-03-15 16:21:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 313 transitions. [2022-03-15 16:21:29,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 313 transitions. [2022-03-15 16:21:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:21:29,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:29,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:29,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:29,723 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,SelfDestructingSolverStorable13 [2022-03-15 16:21:29,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2108487170, now seen corresponding path program 9 times [2022-03-15 16:21:29,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:29,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738450818] [2022-03-15 16:21:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:29,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:29,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738450818] [2022-03-15 16:21:29,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738450818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:29,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670318307] [2022-03-15 16:21:29,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:29,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:29,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:29,844 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 16:21:29,845 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 16:21:29,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:21:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:21:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:30,033 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:21:30,033 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 54 treesize of output 24 [2022-03-15 16:21:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:30,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:30,261 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:21:30,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:21:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:30,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670318307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:30,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:30,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 16:21:30,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634717474] [2022-03-15 16:21:30,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:21:30,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:21:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:21:30,461 INFO L87 Difference]: Start difference. First operand 152 states and 313 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:30,604 INFO L93 Difference]: Finished difference Result 303 states and 621 transitions. [2022-03-15 16:21:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:21:30,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:21:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:30,605 INFO L225 Difference]: With dead ends: 303 [2022-03-15 16:21:30,605 INFO L226 Difference]: Without dead ends: 288 [2022-03-15 16:21:30,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:21:30,606 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:30,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:21:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-15 16:21:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 167. [2022-03-15 16:21:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.0602409638554215) internal successors, (342), 166 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 342 transitions. [2022-03-15 16:21:30,609 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 342 transitions. Word has length 23 [2022-03-15 16:21:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:30,609 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 342 transitions. [2022-03-15 16:21:30,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 342 transitions. [2022-03-15 16:21:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:21:30,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:30,610 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:30,628 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 16:21:30,810 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,SelfDestructingSolverStorable14 [2022-03-15 16:21:30,811 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 768751303, now seen corresponding path program 10 times [2022-03-15 16:21:30,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:30,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553768575] [2022-03-15 16:21:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:30,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:30,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553768575] [2022-03-15 16:21:30,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553768575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:30,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659356352] [2022-03-15 16:21:30,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:21:30,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:30,849 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 16:21:30,850 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 16:21:30,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:21:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:21:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:30,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:30,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659356352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:30,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:30,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 16:21:30,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109025507] [2022-03-15 16:21:30,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:30,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:21:30,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:21:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:21:30,949 INFO L87 Difference]: Start difference. First operand 167 states and 342 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:30,974 INFO L93 Difference]: Finished difference Result 333 states and 673 transitions. [2022-03-15 16:21:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:21:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:21:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:30,975 INFO L225 Difference]: With dead ends: 333 [2022-03-15 16:21:30,976 INFO L226 Difference]: Without dead ends: 329 [2022-03-15 16:21:30,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:21:30,976 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:30,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-15 16:21:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 207. [2022-03-15 16:21:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1116504854368934) internal successors, (435), 206 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 435 transitions. [2022-03-15 16:21:30,981 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 435 transitions. Word has length 24 [2022-03-15 16:21:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:30,981 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 435 transitions. [2022-03-15 16:21:30,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 435 transitions. [2022-03-15 16:21:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:30,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:30,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:30,998 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 16:21:31,198 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,SelfDestructingSolverStorable15 [2022-03-15 16:21:31,198 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1202293654, now seen corresponding path program 11 times [2022-03-15 16:21:31,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:31,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853719528] [2022-03-15 16:21:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:21:31,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:31,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853719528] [2022-03-15 16:21:31,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853719528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:31,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107800754] [2022-03-15 16:21:31,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:21:31,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:31,357 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 16:21:31,366 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 16:21:31,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:21:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:31,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-03-15 16:21:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:31,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:32,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:21:32,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-03-15 16:21:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:32,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107800754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:32,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:32,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-15 16:21:32,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351645280] [2022-03-15 16:21:32,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:32,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:21:32,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:21:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:21:32,247 INFO L87 Difference]: Start difference. First operand 207 states and 435 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:33,040 INFO L93 Difference]: Finished difference Result 828 states and 1696 transitions. [2022-03-15 16:21:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 16:21:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 16:21:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:33,042 INFO L225 Difference]: With dead ends: 828 [2022-03-15 16:21:33,042 INFO L226 Difference]: Without dead ends: 608 [2022-03-15 16:21:33,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:33,043 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 271 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 659 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 559 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-15 16:21:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-03-15 16:21:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 303. [2022-03-15 16:21:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.198675496688742) internal successors, (664), 302 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 664 transitions. [2022-03-15 16:21:33,050 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 664 transitions. Word has length 27 [2022-03-15 16:21:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:33,050 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 664 transitions. [2022-03-15 16:21:33,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 664 transitions. [2022-03-15 16:21:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:33,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:33,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:33,068 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 16:21:33,263 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,SelfDestructingSolverStorable16 [2022-03-15 16:21:33,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash 722400154, now seen corresponding path program 12 times [2022-03-15 16:21:33,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:33,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469299214] [2022-03-15 16:21:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:33,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:33,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469299214] [2022-03-15 16:21:33,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469299214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:33,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122965125] [2022-03-15 16:21:33,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:33,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:33,410 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 16:21:33,411 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 16:21:33,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:21:33,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:33,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:33,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:34,128 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:34,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:34,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122965125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:34,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:34,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-15 16:21:34,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912665716] [2022-03-15 16:21:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:34,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:21:34,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:21:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:21:34,486 INFO L87 Difference]: Start difference. First operand 303 states and 664 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 16:21:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:34,964 INFO L93 Difference]: Finished difference Result 786 states and 1699 transitions. [2022-03-15 16:21:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:21:34,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 27 [2022-03-15 16:21:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:34,967 INFO L225 Difference]: With dead ends: 786 [2022-03-15 16:21:34,967 INFO L226 Difference]: Without dead ends: 721 [2022-03-15 16:21:34,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1258, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:21:34,968 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 149 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:34,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 421 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 335 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-03-15 16:21:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-15 16:21:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 267. [2022-03-15 16:21:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.0977443609022557) internal successors, (558), 266 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 558 transitions. [2022-03-15 16:21:34,975 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 558 transitions. Word has length 27 [2022-03-15 16:21:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:34,975 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 558 transitions. [2022-03-15 16:21:34,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 16:21:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 558 transitions. [2022-03-15 16:21:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:34,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:34,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:34,997 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 16:21:35,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:35,176 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 258366058, now seen corresponding path program 13 times [2022-03-15 16:21:35,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:35,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004079074] [2022-03-15 16:21:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:35,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:35,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004079074] [2022-03-15 16:21:35,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004079074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:35,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797331231] [2022-03-15 16:21:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:35,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:35,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:35,361 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 16:21:35,361 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 16:21:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:35,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:35,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:35,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:35,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:36,091 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:36,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:36,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797331231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:36,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:36,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:21:36,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294131203] [2022-03-15 16:21:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:36,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:21:36,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:21:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:21:36,323 INFO L87 Difference]: Start difference. First operand 267 states and 558 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 16:21:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:36,604 INFO L93 Difference]: Finished difference Result 561 states and 1187 transitions. [2022-03-15 16:21:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 16:21:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 27 [2022-03-15 16:21:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:36,606 INFO L225 Difference]: With dead ends: 561 [2022-03-15 16:21:36,606 INFO L226 Difference]: Without dead ends: 527 [2022-03-15 16:21:36,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:21:36,607 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 147 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:36,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 344 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 218 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-15 16:21:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-15 16:21:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 276. [2022-03-15 16:21:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.090909090909091) internal successors, (575), 275 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 575 transitions. [2022-03-15 16:21:36,613 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 575 transitions. Word has length 27 [2022-03-15 16:21:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:36,613 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 575 transitions. [2022-03-15 16:21:36,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 16:21:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 575 transitions. [2022-03-15 16:21:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:36,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:36,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:36,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:36,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:36,826 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1292581990, now seen corresponding path program 14 times [2022-03-15 16:21:36,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:36,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262051795] [2022-03-15 16:21:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:36,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:36,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:36,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262051795] [2022-03-15 16:21:36,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262051795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:36,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860471454] [2022-03-15 16:21:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:36,972 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 16:21:36,973 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 16:21:36,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:37,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:37,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:37,645 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:37,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:38,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860471454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:38,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:38,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-15 16:21:38,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499137321] [2022-03-15 16:21:38,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:38,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:21:38,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:21:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:21:38,005 INFO L87 Difference]: Start difference. First operand 276 states and 575 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 16:21:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:38,855 INFO L93 Difference]: Finished difference Result 1378 states and 2828 transitions. [2022-03-15 16:21:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:21:38,856 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 27 [2022-03-15 16:21:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:38,859 INFO L225 Difference]: With dead ends: 1378 [2022-03-15 16:21:38,859 INFO L226 Difference]: Without dead ends: 1124 [2022-03-15 16:21:38,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:21:38,860 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 292 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:38,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 702 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 641 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-03-15 16:21:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-03-15 16:21:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 483. [2022-03-15 16:21:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.2053941908713695) internal successors, (1063), 482 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1063 transitions. [2022-03-15 16:21:38,872 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1063 transitions. Word has length 27 [2022-03-15 16:21:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:38,872 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1063 transitions. [2022-03-15 16:21:38,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 16:21:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1063 transitions. [2022-03-15 16:21:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:38,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:38,873 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:38,889 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 16:21:39,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:39,090 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash 168077722, now seen corresponding path program 15 times [2022-03-15 16:21:39,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:39,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384035873] [2022-03-15 16:21:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:39,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:39,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:39,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384035873] [2022-03-15 16:21:39,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384035873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:39,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297270782] [2022-03-15 16:21:39,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:39,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:39,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:39,251 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 16:21:39,251 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 16:21:39,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:21:39,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:39,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:39,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:39,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:39,962 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:40,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297270782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:40,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:40,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:21:40,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62451237] [2022-03-15 16:21:40,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:40,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:21:40,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:21:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:21:40,340 INFO L87 Difference]: Start difference. First operand 483 states and 1063 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 16:21:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:40,710 INFO L93 Difference]: Finished difference Result 1102 states and 2399 transitions. [2022-03-15 16:21:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:21:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 27 [2022-03-15 16:21:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:40,713 INFO L225 Difference]: With dead ends: 1102 [2022-03-15 16:21:40,713 INFO L226 Difference]: Without dead ends: 984 [2022-03-15 16:21:40,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:21:40,714 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 167 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:40,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 547 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 428 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-15 16:21:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-03-15 16:21:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 557. [2022-03-15 16:21:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.221223021582734) internal successors, (1235), 556 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1235 transitions. [2022-03-15 16:21:40,725 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1235 transitions. Word has length 27 [2022-03-15 16:21:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:40,725 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 1235 transitions. [2022-03-15 16:21:40,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 16:21:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1235 transitions. [2022-03-15 16:21:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:40,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:40,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:40,742 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 16:21:40,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:40,943 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1021849130, now seen corresponding path program 16 times [2022-03-15 16:21:40,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:40,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734045922] [2022-03-15 16:21:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:40,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:41,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:41,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734045922] [2022-03-15 16:21:41,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734045922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:41,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098371134] [2022-03-15 16:21:41,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:21:41,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:41,092 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 16:21:41,093 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 16:21:41,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:21:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:41,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:41,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:41,751 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:41,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:42,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098371134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:42,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:42,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-03-15 16:21:42,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825671477] [2022-03-15 16:21:42,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:42,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:21:42,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:21:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:21:42,068 INFO L87 Difference]: Start difference. First operand 557 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:42,647 INFO L93 Difference]: Finished difference Result 1295 states and 2746 transitions. [2022-03-15 16:21:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:21:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:21:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:42,651 INFO L225 Difference]: With dead ends: 1295 [2022-03-15 16:21:42,651 INFO L226 Difference]: Without dead ends: 1081 [2022-03-15 16:21:42,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:21:42,652 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 245 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:42,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 725 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 684 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-03-15 16:21:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-03-15 16:21:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 599. [2022-03-15 16:21:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.222408026755853) internal successors, (1329), 598 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1329 transitions. [2022-03-15 16:21:42,663 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1329 transitions. Word has length 27 [2022-03-15 16:21:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:42,663 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1329 transitions. [2022-03-15 16:21:42,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1329 transitions. [2022-03-15 16:21:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:42,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:42,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:42,680 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 16:21:42,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:42,879 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1812458454, now seen corresponding path program 17 times [2022-03-15 16:21:42,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:42,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774135882] [2022-03-15 16:21:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:42,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:43,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774135882] [2022-03-15 16:21:43,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774135882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:43,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71872686] [2022-03-15 16:21:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:21:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:43,050 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 16:21:43,051 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 16:21:43,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:21:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:43,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 16:21:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:43,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-03-15 16:21:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:43,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:21:43,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-03-15 16:21:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:43,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71872686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:43,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:43,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 16:21:43,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654361940] [2022-03-15 16:21:43,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:43,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:21:43,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:21:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:21:43,927 INFO L87 Difference]: Start difference. First operand 599 states and 1329 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:45,443 INFO L93 Difference]: Finished difference Result 1349 states and 2863 transitions. [2022-03-15 16:21:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:21:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 16:21:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:45,447 INFO L225 Difference]: With dead ends: 1349 [2022-03-15 16:21:45,448 INFO L226 Difference]: Without dead ends: 1184 [2022-03-15 16:21:45,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:21:45,449 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 274 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:45,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 783 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 547 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-03-15 16:21:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-03-15 16:21:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 724. [2022-03-15 16:21:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2378976486860305) internal successors, (1618), 723 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1618 transitions. [2022-03-15 16:21:45,465 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1618 transitions. Word has length 27 [2022-03-15 16:21:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:45,465 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1618 transitions. [2022-03-15 16:21:45,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1618 transitions. [2022-03-15 16:21:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:21:45,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:45,466 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:45,496 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 16:21:45,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:45,679 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash 982353754, now seen corresponding path program 18 times [2022-03-15 16:21:45,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:45,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694690657] [2022-03-15 16:21:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:45,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:45,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694690657] [2022-03-15 16:21:45,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694690657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:45,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044254773] [2022-03-15 16:21:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:45,844 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 16:21:45,845 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 16:21:45,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:21:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:45,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:46,094 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:21:46,094 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 71 treesize of output 29 [2022-03-15 16:21:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:46,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:46,454 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:46,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:46,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044254773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:46,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:46,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-15 16:21:46,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757090121] [2022-03-15 16:21:46,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:46,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:21:46,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:21:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:21:46,836 INFO L87 Difference]: Start difference. First operand 724 states and 1618 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:47,162 INFO L93 Difference]: Finished difference Result 1075 states and 2357 transitions. [2022-03-15 16:21:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:21:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:21:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:47,165 INFO L225 Difference]: With dead ends: 1075 [2022-03-15 16:21:47,165 INFO L226 Difference]: Without dead ends: 1045 [2022-03-15 16:21:47,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:21:47,166 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 171 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:47,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 478 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:21:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-03-15 16:21:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 729. [2022-03-15 16:21:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.23489010989011) internal successors, (1627), 728 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1627 transitions. [2022-03-15 16:21:47,177 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1627 transitions. Word has length 27 [2022-03-15 16:21:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1627 transitions. [2022-03-15 16:21:47,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1627 transitions. [2022-03-15 16:21:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:21:47,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:47,179 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:47,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:47,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:21:47,395 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 218353775, now seen corresponding path program 19 times [2022-03-15 16:21:47,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:47,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378788872] [2022-03-15 16:21:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:47,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:47,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:47,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378788872] [2022-03-15 16:21:47,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378788872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:47,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832433437] [2022-03-15 16:21:47,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:47,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:47,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:47,429 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 16:21:47,430 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 16:21:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:21:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:47,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:47,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832433437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:47,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:47,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 16:21:47,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080131079] [2022-03-15 16:21:47,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:47,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 16:21:47,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 16:21:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:21:47,545 INFO L87 Difference]: Start difference. First operand 729 states and 1627 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:47,579 INFO L93 Difference]: Finished difference Result 1113 states and 2488 transitions. [2022-03-15 16:21:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:21:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:21:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:47,583 INFO L225 Difference]: With dead ends: 1113 [2022-03-15 16:21:47,583 INFO L226 Difference]: Without dead ends: 1108 [2022-03-15 16:21:47,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:21:47,583 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:47,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:21:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-03-15 16:21:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 920. [2022-03-15 16:21:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.2807399347116433) internal successors, (2096), 919 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2096 transitions. [2022-03-15 16:21:47,597 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2096 transitions. Word has length 28 [2022-03-15 16:21:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2096 transitions. [2022-03-15 16:21:47,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2096 transitions. [2022-03-15 16:21:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:21:47,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:47,598 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:47,616 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 16:21:47,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-15 16:21:47,814 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:47,814 INFO L85 PathProgramCache]: Analyzing trace with hash -847195769, now seen corresponding path program 20 times [2022-03-15 16:21:47,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:47,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835886790] [2022-03-15 16:21:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:47,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:47,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835886790] [2022-03-15 16:21:47,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835886790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:47,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926354320] [2022-03-15 16:21:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:47,970 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:47,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:21:47,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:48,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:48,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:48,736 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:48,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:49,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926354320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:49,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:49,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 16:21:49,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481404726] [2022-03-15 16:21:49,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:49,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:21:49,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:21:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:21:49,053 INFO L87 Difference]: Start difference. First operand 920 states and 2096 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:49,317 INFO L93 Difference]: Finished difference Result 1395 states and 3100 transitions. [2022-03-15 16:21:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 16:21:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:21:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:49,321 INFO L225 Difference]: With dead ends: 1395 [2022-03-15 16:21:49,321 INFO L226 Difference]: Without dead ends: 1365 [2022-03-15 16:21:49,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:21:49,322 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:49,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 391 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 262 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-15 16:21:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-03-15 16:21:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 890. [2022-03-15 16:21:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.280089988751406) internal successors, (2027), 889 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2027 transitions. [2022-03-15 16:21:49,338 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2027 transitions. Word has length 30 [2022-03-15 16:21:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:49,339 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2027 transitions. [2022-03-15 16:21:49,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2027 transitions. [2022-03-15 16:21:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:21:49,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:49,340 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:49,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:21:49,547 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1977486249, now seen corresponding path program 21 times [2022-03-15 16:21:49,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:49,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873973777] [2022-03-15 16:21:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:49,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:49,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:49,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873973777] [2022-03-15 16:21:49,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873973777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:49,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798332261] [2022-03-15 16:21:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:21:49,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:49,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:49,704 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:49,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:21:49,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:21:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 16:21:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:50,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 29 [2022-03-15 16:21:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:50,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:50,454 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:50,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 188 [2022-03-15 16:21:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:50,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798332261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:50,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:50,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-15 16:21:50,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614438560] [2022-03-15 16:21:50,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:50,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:21:50,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:21:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:21:50,859 INFO L87 Difference]: Start difference. First operand 890 states and 2027 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:51,162 INFO L93 Difference]: Finished difference Result 1330 states and 2969 transitions. [2022-03-15 16:21:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:21:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:21:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:51,167 INFO L225 Difference]: With dead ends: 1330 [2022-03-15 16:21:51,167 INFO L226 Difference]: Without dead ends: 1308 [2022-03-15 16:21:51,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:21:51,167 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 131 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:51,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 465 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 258 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-03-15 16:21:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-15 16:21:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 965. [2022-03-15 16:21:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.3215767634854774) internal successors, (2238), 964 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2238 transitions. [2022-03-15 16:21:51,183 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2238 transitions. Word has length 30 [2022-03-15 16:21:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2238 transitions. [2022-03-15 16:21:51,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2238 transitions. [2022-03-15 16:21:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:21:51,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:51,184 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:51,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:51,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:51,399 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash 919637303, now seen corresponding path program 22 times [2022-03-15 16:21:51,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:51,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381815601] [2022-03-15 16:21:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:51,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:51,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381815601] [2022-03-15 16:21:51,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381815601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:51,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805559638] [2022-03-15 16:21:51,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:21:51,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:51,548 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:51,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:21:51,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:21:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:51,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:51,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:51,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:52,274 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:52,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:52,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805559638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:52,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:52,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:21:52,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484453371] [2022-03-15 16:21:52,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:52,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:21:52,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:21:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:21:52,736 INFO L87 Difference]: Start difference. First operand 965 states and 2238 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:53,174 INFO L93 Difference]: Finished difference Result 1623 states and 3666 transitions. [2022-03-15 16:21:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:21:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:21:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:53,179 INFO L225 Difference]: With dead ends: 1623 [2022-03-15 16:21:53,179 INFO L226 Difference]: Without dead ends: 1549 [2022-03-15 16:21:53,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:21:53,180 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:53,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 507 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 348 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-03-15 16:21:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-03-15 16:21:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 938. [2022-03-15 16:21:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 2.312700106723586) internal successors, (2167), 937 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2167 transitions. [2022-03-15 16:21:53,196 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2167 transitions. Word has length 30 [2022-03-15 16:21:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:53,196 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 2167 transitions. [2022-03-15 16:21:53,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2167 transitions. [2022-03-15 16:21:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:21:53,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:53,197 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:53,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:53,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:21:53,413 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash 130006983, now seen corresponding path program 23 times [2022-03-15 16:21:53,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:53,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69071127] [2022-03-15 16:21:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:53,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:53,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69071127] [2022-03-15 16:21:53,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69071127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:53,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098153673] [2022-03-15 16:21:53,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:21:53,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:53,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:53,569 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:21:53,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:21:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:21:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:53,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 29 [2022-03-15 16:21:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:54,270 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:21:54,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:21:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:54,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098153673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:54,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:54,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-15 16:21:54,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94805211] [2022-03-15 16:21:54,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:54,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:21:54,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:21:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:21:54,692 INFO L87 Difference]: Start difference. First operand 938 states and 2167 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:55,168 INFO L93 Difference]: Finished difference Result 1547 states and 3470 transitions. [2022-03-15 16:21:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:21:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:21:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:55,172 INFO L225 Difference]: With dead ends: 1547 [2022-03-15 16:21:55,172 INFO L226 Difference]: Without dead ends: 1487 [2022-03-15 16:21:55,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:21:55,173 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 192 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:55,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 430 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 240 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-03-15 16:21:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-03-15 16:21:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 892. [2022-03-15 16:21:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.313131313131313) internal successors, (2061), 891 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2061 transitions. [2022-03-15 16:21:55,188 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2061 transitions. Word has length 30 [2022-03-15 16:21:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:55,189 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2061 transitions. [2022-03-15 16:21:55,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2061 transitions. [2022-03-15 16:21:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:21:55,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:55,190 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:55,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:21:55,403 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2076351950, now seen corresponding path program 24 times [2022-03-15 16:21:55,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:55,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107591291] [2022-03-15 16:21:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:55,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:55,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:55,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107591291] [2022-03-15 16:21:55,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107591291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:55,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325273154] [2022-03-15 16:21:55,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:55,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:55,587 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:55,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:21:55,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:21:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:55,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:21:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:56,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:21:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:56,606 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:21:56,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:21:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:57,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325273154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:57,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:57,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 16:21:57,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083973193] [2022-03-15 16:21:57,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:57,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:21:57,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:21:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:21:57,170 INFO L87 Difference]: Start difference. First operand 892 states and 2061 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:58,215 INFO L93 Difference]: Finished difference Result 2169 states and 4810 transitions. [2022-03-15 16:21:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:21:58,216 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:21:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:58,222 INFO L225 Difference]: With dead ends: 2169 [2022-03-15 16:21:58,222 INFO L226 Difference]: Without dead ends: 2112 [2022-03-15 16:21:58,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:21:58,224 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 252 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:58,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 696 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 525 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-03-15 16:21:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-03-15 16:21:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1058. [2022-03-15 16:21:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.3103122043519395) internal successors, (2442), 1057 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2442 transitions. [2022-03-15 16:21:58,244 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2442 transitions. Word has length 31 [2022-03-15 16:21:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:58,244 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 2442 transitions. [2022-03-15 16:21:58,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2442 transitions. [2022-03-15 16:21:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:21:58,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:58,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:58,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:58,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:58,462 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1093419102, now seen corresponding path program 25 times [2022-03-15 16:21:58,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:58,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578011327] [2022-03-15 16:21:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:58,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:58,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:58,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578011327] [2022-03-15 16:21:58,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578011327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:58,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182122638] [2022-03-15 16:21:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:58,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:58,649 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:58,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:21:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:58,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:21:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:59,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:21:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:59,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:59,636 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:21:59,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:00,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182122638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:00,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:00,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-03-15 16:22:00,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749055398] [2022-03-15 16:22:00,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:00,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:22:00,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:22:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:22:00,333 INFO L87 Difference]: Start difference. First operand 1058 states and 2442 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:01,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:01,505 INFO L93 Difference]: Finished difference Result 2806 states and 6196 transitions. [2022-03-15 16:22:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:22:01,506 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:01,512 INFO L225 Difference]: With dead ends: 2806 [2022-03-15 16:22:01,512 INFO L226 Difference]: Without dead ends: 2425 [2022-03-15 16:22:01,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=2657, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:22:01,513 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 368 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:01,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 995 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 962 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2022-03-15 16:22:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-03-15 16:22:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1226. [2022-03-15 16:22:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.2946938775510204) internal successors, (2811), 1225 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2811 transitions. [2022-03-15 16:22:01,535 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2811 transitions. Word has length 31 [2022-03-15 16:22:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:01,536 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2811 transitions. [2022-03-15 16:22:01,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2811 transitions. [2022-03-15 16:22:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:01,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:01,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:01,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:01,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:01,752 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash 31141282, now seen corresponding path program 26 times [2022-03-15 16:22:01,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:01,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270604886] [2022-03-15 16:22:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:01,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:01,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270604886] [2022-03-15 16:22:01,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270604886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:01,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761054134] [2022-03-15 16:22:01,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:22:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:01,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:01,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:22:01,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:22:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:01,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:02,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:02,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:02,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:02,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:02,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:02,953 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:02,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:03,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761054134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:03,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:03,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 16:22:03,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556768823] [2022-03-15 16:22:03,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:03,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:22:03,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:22:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:22:03,331 INFO L87 Difference]: Start difference. First operand 1226 states and 2811 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:04,091 INFO L93 Difference]: Finished difference Result 2441 states and 5507 transitions. [2022-03-15 16:22:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:22:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:04,096 INFO L225 Difference]: With dead ends: 2441 [2022-03-15 16:22:04,096 INFO L226 Difference]: Without dead ends: 2260 [2022-03-15 16:22:04,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=2268, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:22:04,097 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 256 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:04,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 617 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 464 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-03-15 16:22:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-03-15 16:22:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 788. [2022-03-15 16:22:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.1880559085133418) internal successors, (1722), 787 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1722 transitions. [2022-03-15 16:22:04,118 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1722 transitions. Word has length 31 [2022-03-15 16:22:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:04,118 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1722 transitions. [2022-03-15 16:22:04,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1722 transitions. [2022-03-15 16:22:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:04,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:04,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:04,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:22:04,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:04,331 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1216036466, now seen corresponding path program 27 times [2022-03-15 16:22:04,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:04,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238019890] [2022-03-15 16:22:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:04,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:04,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238019890] [2022-03-15 16:22:04,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238019890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:04,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301373092] [2022-03-15 16:22:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:04,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:04,518 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:04,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:22:04,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:22:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:04,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:04,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:04,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:04,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:04,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:05,528 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:05,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:06,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301373092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:06,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:06,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 16:22:06,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3564309] [2022-03-15 16:22:06,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:22:06,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:22:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:22:06,193 INFO L87 Difference]: Start difference. First operand 788 states and 1722 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:07,161 INFO L93 Difference]: Finished difference Result 1940 states and 4106 transitions. [2022-03-15 16:22:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:22:07,161 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:07,164 INFO L225 Difference]: With dead ends: 1940 [2022-03-15 16:22:07,164 INFO L226 Difference]: Without dead ends: 1621 [2022-03-15 16:22:07,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=432, Invalid=2220, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:22:07,165 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 370 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:07,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 974 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 882 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-03-15 16:22:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-15 16:22:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 964. [2022-03-15 16:22:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.2242990654205608) internal successors, (2142), 963 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2142 transitions. [2022-03-15 16:22:07,179 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2142 transitions. Word has length 31 [2022-03-15 16:22:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2142 transitions. [2022-03-15 16:22:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2142 transitions. [2022-03-15 16:22:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:07,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:07,181 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:07,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:22:07,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:07,390 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1954370446, now seen corresponding path program 28 times [2022-03-15 16:22:07,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:07,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764554587] [2022-03-15 16:22:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:07,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:07,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764554587] [2022-03-15 16:22:07,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764554587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:07,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579980497] [2022-03-15 16:22:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:22:07,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:07,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:07,576 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:07,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:22:07,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:22:07,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:07,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:08,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:08,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:08,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:08,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:08,598 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:08,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:09,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579980497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:09,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:09,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:22:09,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878709775] [2022-03-15 16:22:09,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:09,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:22:09,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:22:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:22:09,160 INFO L87 Difference]: Start difference. First operand 964 states and 2142 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:10,263 INFO L93 Difference]: Finished difference Result 2244 states and 4890 transitions. [2022-03-15 16:22:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:22:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:10,267 INFO L225 Difference]: With dead ends: 2244 [2022-03-15 16:22:10,267 INFO L226 Difference]: Without dead ends: 2003 [2022-03-15 16:22:10,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=3642, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:22:10,269 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 362 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:10,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 722 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 614 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-03-15 16:22:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-03-15 16:22:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 578. [2022-03-15 16:22:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.197573656845754) internal successors, (1268), 577 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1268 transitions. [2022-03-15 16:22:10,281 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1268 transitions. Word has length 31 [2022-03-15 16:22:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:10,282 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1268 transitions. [2022-03-15 16:22:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1268 transitions. [2022-03-15 16:22:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:10,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:10,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:10,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:10,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 16:22:10,487 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash -663106590, now seen corresponding path program 29 times [2022-03-15 16:22:10,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:10,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122699609] [2022-03-15 16:22:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:10,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:10,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:10,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122699609] [2022-03-15 16:22:10,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122699609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:10,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823948353] [2022-03-15 16:22:10,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:22:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:10,682 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:10,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:22:10,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:22:10,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:10,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:22:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:11,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 32 [2022-03-15 16:22:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:11,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:11,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:11,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:22:11,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:22:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:11,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823948353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:11,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:11,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-15 16:22:11,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185329597] [2022-03-15 16:22:11,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:11,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:22:11,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:22:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:22:11,772 INFO L87 Difference]: Start difference. First operand 578 states and 1268 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:11,979 INFO L93 Difference]: Finished difference Result 737 states and 1571 transitions. [2022-03-15 16:22:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 16:22:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:11,981 INFO L225 Difference]: With dead ends: 737 [2022-03-15 16:22:11,981 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 16:22:11,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:22:11,982 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:11,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 635 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 16:22:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 16:22:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 657. [2022-03-15 16:22:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.182926829268293) internal successors, (1432), 656 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1432 transitions. [2022-03-15 16:22:11,989 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1432 transitions. Word has length 31 [2022-03-15 16:22:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1432 transitions. [2022-03-15 16:22:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1432 transitions. [2022-03-15 16:22:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:11,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:11,991 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:12,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:12,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:12,207 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1342373102, now seen corresponding path program 30 times [2022-03-15 16:22:12,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:12,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432473100] [2022-03-15 16:22:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:12,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:12,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432473100] [2022-03-15 16:22:12,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432473100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:12,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109725033] [2022-03-15 16:22:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:22:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:12,406 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:12,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:22:12,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:22:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:12,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:22:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:12,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:12,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 34 [2022-03-15 16:22:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:12,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:13,432 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:13,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:13,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109725033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:13,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:13,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:22:13,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50949910] [2022-03-15 16:22:13,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:22:13,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:22:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:22:13,956 INFO L87 Difference]: Start difference. First operand 657 states and 1432 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:15,000 INFO L93 Difference]: Finished difference Result 1434 states and 3086 transitions. [2022-03-15 16:22:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:22:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:15,003 INFO L225 Difference]: With dead ends: 1434 [2022-03-15 16:22:15,003 INFO L226 Difference]: Without dead ends: 1387 [2022-03-15 16:22:15,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=708, Invalid=2832, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:22:15,004 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 191 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:15,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 959 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 606 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-03-15 16:22:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-15 16:22:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 592. [2022-03-15 16:22:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.179357021996616) internal successors, (1288), 591 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1288 transitions. [2022-03-15 16:22:15,014 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1288 transitions. Word has length 31 [2022-03-15 16:22:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:15,014 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1288 transitions. [2022-03-15 16:22:15,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1288 transitions. [2022-03-15 16:22:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:15,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:15,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:15,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:15,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:15,231 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1725856206, now seen corresponding path program 31 times [2022-03-15 16:22:15,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:15,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961652316] [2022-03-15 16:22:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:22:15,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:15,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961652316] [2022-03-15 16:22:15,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961652316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:15,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732691762] [2022-03-15 16:22:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:22:15,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:15,433 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:15,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:22:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:15,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:15,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:15,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:16,436 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:16,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:17,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732691762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:17,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:17,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:22:17,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007897042] [2022-03-15 16:22:17,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:17,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:17,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:17,281 INFO L87 Difference]: Start difference. First operand 592 states and 1288 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 16:22:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:18,389 INFO L93 Difference]: Finished difference Result 2141 states and 4533 transitions. [2022-03-15 16:22:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:22:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 31 [2022-03-15 16:22:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:18,393 INFO L225 Difference]: With dead ends: 2141 [2022-03-15 16:22:18,393 INFO L226 Difference]: Without dead ends: 1679 [2022-03-15 16:22:18,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:22:18,394 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:18,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 848 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 760 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-03-15 16:22:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-03-15 16:22:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 666. [2022-03-15 16:22:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.186466165413534) internal successors, (1454), 665 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1454 transitions. [2022-03-15 16:22:18,406 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1454 transitions. Word has length 31 [2022-03-15 16:22:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:18,406 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1454 transitions. [2022-03-15 16:22:18,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 16:22:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1454 transitions. [2022-03-15 16:22:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:18,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:18,407 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:18,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:22:18,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:22:18,615 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash -434592350, now seen corresponding path program 32 times [2022-03-15 16:22:18,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:18,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482967335] [2022-03-15 16:22:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:18,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:18,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482967335] [2022-03-15 16:22:18,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482967335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:18,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974731465] [2022-03-15 16:22:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:22:18,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:18,811 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:18,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:22:18,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:22:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:18,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:19,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:19,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:19,805 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:19,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:20,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974731465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:20,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:20,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-15 16:22:20,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515032904] [2022-03-15 16:22:20,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:20,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:22:20,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:22:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:22:20,438 INFO L87 Difference]: Start difference. First operand 666 states and 1454 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:21,160 INFO L93 Difference]: Finished difference Result 1451 states and 3127 transitions. [2022-03-15 16:22:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:22:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:21,163 INFO L225 Difference]: With dead ends: 1451 [2022-03-15 16:22:21,163 INFO L226 Difference]: Without dead ends: 1396 [2022-03-15 16:22:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=2359, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:22:21,167 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 222 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:21,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 658 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 444 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-03-15 16:22:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-03-15 16:22:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 691. [2022-03-15 16:22:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.1782608695652175) internal successors, (1503), 690 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1503 transitions. [2022-03-15 16:22:21,182 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1503 transitions. Word has length 31 [2022-03-15 16:22:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:21,182 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1503 transitions. [2022-03-15 16:22:21,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1503 transitions. [2022-03-15 16:22:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:21,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:21,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:21,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:22:21,395 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 23229282, now seen corresponding path program 33 times [2022-03-15 16:22:21,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:21,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742707183] [2022-03-15 16:22:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:21,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:21,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742707183] [2022-03-15 16:22:21,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742707183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:21,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156064071] [2022-03-15 16:22:21,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:21,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:21,583 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:21,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:22:21,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:22:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:21,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:21,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:21,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:22,530 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:22,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:22,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156064071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:22,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:22,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-03-15 16:22:22,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146350036] [2022-03-15 16:22:22,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:22:22,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:22:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:22:22,994 INFO L87 Difference]: Start difference. First operand 691 states and 1503 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:23,868 INFO L93 Difference]: Finished difference Result 1827 states and 3810 transitions. [2022-03-15 16:22:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:22:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:23,871 INFO L225 Difference]: With dead ends: 1827 [2022-03-15 16:22:23,871 INFO L226 Difference]: Without dead ends: 1522 [2022-03-15 16:22:23,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:22:23,872 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 392 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:23,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 868 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 801 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-03-15 16:22:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-03-15 16:22:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 826. [2022-03-15 16:22:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1866666666666665) internal successors, (1804), 825 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1804 transitions. [2022-03-15 16:22:23,885 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1804 transitions. Word has length 31 [2022-03-15 16:22:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1804 transitions. [2022-03-15 16:22:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1804 transitions. [2022-03-15 16:22:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:23,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:23,886 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:23,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:22:24,099 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1937419986, now seen corresponding path program 34 times [2022-03-15 16:22:24,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:24,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004531796] [2022-03-15 16:22:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:24,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:24,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:24,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004531796] [2022-03-15 16:22:24,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004531796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:24,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437098012] [2022-03-15 16:22:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:22:24,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:24,287 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:24,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:22:24,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:22:24,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:24,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:24,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:24,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:25,250 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:25,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:25,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437098012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:25,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:25,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-03-15 16:22:25,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237691739] [2022-03-15 16:22:25,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:25,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:22:25,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:22:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:22:25,994 INFO L87 Difference]: Start difference. First operand 826 states and 1804 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:26,768 INFO L93 Difference]: Finished difference Result 1711 states and 3652 transitions. [2022-03-15 16:22:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:22:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:26,771 INFO L225 Difference]: With dead ends: 1711 [2022-03-15 16:22:26,771 INFO L226 Difference]: Without dead ends: 1627 [2022-03-15 16:22:26,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:22:26,772 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 249 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:26,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 774 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 620 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-03-15 16:22:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-03-15 16:22:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 814. [2022-03-15 16:22:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.1894218942189423) internal successors, (1780), 813 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1780 transitions. [2022-03-15 16:22:26,786 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1780 transitions. Word has length 31 [2022-03-15 16:22:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:26,786 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1780 transitions. [2022-03-15 16:22:26,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1780 transitions. [2022-03-15 16:22:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:26,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:26,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:26,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:27,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:22:27,003 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1855913774, now seen corresponding path program 35 times [2022-03-15 16:22:27,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:27,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431473263] [2022-03-15 16:22:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:27,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:27,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:27,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431473263] [2022-03-15 16:22:27,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431473263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:27,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869418075] [2022-03-15 16:22:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:22:27,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:27,229 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:27,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:22:27,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:22:27,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:27,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 16:22:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:27,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:27,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:27,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2022-03-15 16:22:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:27,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:29,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:29,239 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-03-15 16:22:29,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-03-15 16:22:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:29,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869418075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:29,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:29,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-03-15 16:22:29,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467652710] [2022-03-15 16:22:29,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:29,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:22:29,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:22:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:22:29,949 INFO L87 Difference]: Start difference. First operand 814 states and 1780 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:33,047 INFO L93 Difference]: Finished difference Result 1153 states and 2507 transitions. [2022-03-15 16:22:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:22:33,047 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:22:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:33,049 INFO L225 Difference]: With dead ends: 1153 [2022-03-15 16:22:33,049 INFO L226 Difference]: Without dead ends: 1138 [2022-03-15 16:22:33,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:22:33,050 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:33,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 669 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 311 Unchecked, 0.1s Time] [2022-03-15 16:22:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-03-15 16:22:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 910. [2022-03-15 16:22:33,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.2222222222222223) internal successors, (2020), 909 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2020 transitions. [2022-03-15 16:22:33,061 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2020 transitions. Word has length 31 [2022-03-15 16:22:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:33,061 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2020 transitions. [2022-03-15 16:22:33,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2020 transitions. [2022-03-15 16:22:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:22:33,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:33,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:33,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:33,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:33,275 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -481439902, now seen corresponding path program 36 times [2022-03-15 16:22:33,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:33,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133432300] [2022-03-15 16:22:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:33,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:33,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:33,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133432300] [2022-03-15 16:22:33,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133432300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:33,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059389160] [2022-03-15 16:22:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:22:33,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:33,488 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:33,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:22:33,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:22:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:33,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:34,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:34,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:34,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 34 [2022-03-15 16:22:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:34,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:35,461 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-03-15 16:22:35,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-03-15 16:22:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:35,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059389160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:35,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:35,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:22:35,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915857466] [2022-03-15 16:22:35,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:35,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:22:35,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:22:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:22:35,861 INFO L87 Difference]: Start difference. First operand 910 states and 2020 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 16:22:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:37,216 INFO L93 Difference]: Finished difference Result 1248 states and 2716 transitions. [2022-03-15 16:22:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:22:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 31 [2022-03-15 16:22:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:37,218 INFO L225 Difference]: With dead ends: 1248 [2022-03-15 16:22:37,218 INFO L226 Difference]: Without dead ends: 1209 [2022-03-15 16:22:37,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:22:37,219 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:37,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 607 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 120 Invalid, 0 Unknown, 309 Unchecked, 0.1s Time] [2022-03-15 16:22:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-03-15 16:22:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 994. [2022-03-15 16:22:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.229607250755287) internal successors, (2214), 993 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2214 transitions. [2022-03-15 16:22:37,231 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2214 transitions. Word has length 31 [2022-03-15 16:22:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 2214 transitions. [2022-03-15 16:22:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 16:22:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2214 transitions. [2022-03-15 16:22:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:37,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:37,232 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:37,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:37,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:22:37,446 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 156759775, now seen corresponding path program 37 times [2022-03-15 16:22:37,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:37,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501567330] [2022-03-15 16:22:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:37,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:37,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501567330] [2022-03-15 16:22:37,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501567330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:37,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197103702] [2022-03-15 16:22:37,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:22:37,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:37,628 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:37,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:22:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:38,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:38,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:38,688 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:38,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:39,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197103702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:39,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:39,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:22:39,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752558839] [2022-03-15 16:22:39,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:39,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:39,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:39,276 INFO L87 Difference]: Start difference. First operand 994 states and 2214 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:40,439 INFO L93 Difference]: Finished difference Result 2543 states and 5462 transitions. [2022-03-15 16:22:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:22:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:40,442 INFO L225 Difference]: With dead ends: 2543 [2022-03-15 16:22:40,442 INFO L226 Difference]: Without dead ends: 2235 [2022-03-15 16:22:40,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:22:40,443 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 356 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:40,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 963 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 808 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-03-15 16:22:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-03-15 16:22:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1237. [2022-03-15 16:22:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.26294498381877) internal successors, (2797), 1236 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2797 transitions. [2022-03-15 16:22:40,461 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2797 transitions. Word has length 34 [2022-03-15 16:22:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 2797 transitions. [2022-03-15 16:22:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2797 transitions. [2022-03-15 16:22:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:40,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:40,463 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:40,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:22:40,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:22:40,670 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash -839039841, now seen corresponding path program 38 times [2022-03-15 16:22:40,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:40,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666516141] [2022-03-15 16:22:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:40,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:40,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666516141] [2022-03-15 16:22:40,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666516141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:40,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939667152] [2022-03-15 16:22:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:22:40,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:40,860 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:40,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:22:40,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:22:40,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:40,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:40,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:41,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:41,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:41,905 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:41,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:42,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939667152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:42,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:42,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:22:42,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243565224] [2022-03-15 16:22:42,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:42,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:42,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:42,416 INFO L87 Difference]: Start difference. First operand 1237 states and 2797 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:43,359 INFO L93 Difference]: Finished difference Result 2698 states and 5891 transitions. [2022-03-15 16:22:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:22:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:43,363 INFO L225 Difference]: With dead ends: 2698 [2022-03-15 16:22:43,363 INFO L226 Difference]: Without dead ends: 2373 [2022-03-15 16:22:43,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1946, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:22:43,363 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 384 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:43,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 1074 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 775 Invalid, 0 Unknown, 267 Unchecked, 0.4s Time] [2022-03-15 16:22:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-03-15 16:22:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1308. [2022-03-15 16:22:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.2478959449120124) internal successors, (2938), 1307 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2938 transitions. [2022-03-15 16:22:43,382 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2938 transitions. Word has length 34 [2022-03-15 16:22:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:43,382 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2938 transitions. [2022-03-15 16:22:43,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2938 transitions. [2022-03-15 16:22:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:43,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:43,384 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:43,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 16:22:43,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-15 16:22:43,585 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1044819745, now seen corresponding path program 39 times [2022-03-15 16:22:43,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:43,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079994746] [2022-03-15 16:22:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:43,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:43,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079994746] [2022-03-15 16:22:43,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079994746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:43,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360704996] [2022-03-15 16:22:43,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:22:43,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:43,794 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:43,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:22:43,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:22:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:43,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:44,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:44,896 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:44,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:45,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360704996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:45,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:45,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-15 16:22:45,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483646151] [2022-03-15 16:22:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:45,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:45,556 INFO L87 Difference]: Start difference. First operand 1308 states and 2938 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:46,722 INFO L93 Difference]: Finished difference Result 3651 states and 7798 transitions. [2022-03-15 16:22:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:22:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:46,727 INFO L225 Difference]: With dead ends: 3651 [2022-03-15 16:22:46,728 INFO L226 Difference]: Without dead ends: 3378 [2022-03-15 16:22:46,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=2287, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:22:46,728 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 346 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:46,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1211 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 947 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-03-15 16:22:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2022-03-15 16:22:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 1870. [2022-03-15 16:22:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 2.2659176029962547) internal successors, (4235), 1869 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 4235 transitions. [2022-03-15 16:22:46,768 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 4235 transitions. Word has length 34 [2022-03-15 16:22:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:46,769 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 4235 transitions. [2022-03-15 16:22:46,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 4235 transitions. [2022-03-15 16:22:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:46,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:46,771 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:46,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:46,983 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1177399239, now seen corresponding path program 40 times [2022-03-15 16:22:46,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:46,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826133885] [2022-03-15 16:22:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:46,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:22:47,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:47,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826133885] [2022-03-15 16:22:47,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826133885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:47,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739270337] [2022-03-15 16:22:47,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:22:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:47,204 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:47,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:22:47,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:22:47,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:47,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:22:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:47,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:47,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 34 [2022-03-15 16:22:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:22:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:48,210 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:48,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:22:48,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739270337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:48,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:48,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-15 16:22:48,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673817631] [2022-03-15 16:22:48,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:48,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:48,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:48,824 INFO L87 Difference]: Start difference. First operand 1870 states and 4235 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:49,589 INFO L93 Difference]: Finished difference Result 3091 states and 6858 transitions. [2022-03-15 16:22:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:22:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:49,593 INFO L225 Difference]: With dead ends: 3091 [2022-03-15 16:22:49,593 INFO L226 Difference]: Without dead ends: 2986 [2022-03-15 16:22:49,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:22:49,593 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 239 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:49,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 969 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 631 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2022-03-15 16:22:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-03-15 16:22:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 1914. [2022-03-15 16:22:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.261369576581286) internal successors, (4326), 1913 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 4326 transitions. [2022-03-15 16:22:49,621 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 4326 transitions. Word has length 34 [2022-03-15 16:22:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 4326 transitions. [2022-03-15 16:22:49,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 4326 transitions. [2022-03-15 16:22:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:49,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:49,624 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:49,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:49,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:49,839 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -535331473, now seen corresponding path program 41 times [2022-03-15 16:22:49,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:49,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076494851] [2022-03-15 16:22:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:50,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:50,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076494851] [2022-03-15 16:22:50,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076494851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:50,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020358655] [2022-03-15 16:22:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:22:50,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:50,056 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:50,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:22:50,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:22:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:50,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:50,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:51,143 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:51,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:51,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020358655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:51,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:51,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-15 16:22:51,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364367376] [2022-03-15 16:22:51,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:22:51,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:22:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:22:51,633 INFO L87 Difference]: Start difference. First operand 1914 states and 4326 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:52,679 INFO L93 Difference]: Finished difference Result 3135 states and 6935 transitions. [2022-03-15 16:22:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:22:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:52,683 INFO L225 Difference]: With dead ends: 3135 [2022-03-15 16:22:52,684 INFO L226 Difference]: Without dead ends: 3045 [2022-03-15 16:22:52,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=627, Invalid=3033, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:22:52,684 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 233 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:52,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1182 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 683 Invalid, 0 Unknown, 550 Unchecked, 0.3s Time] [2022-03-15 16:22:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2022-03-15 16:22:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 1941. [2022-03-15 16:22:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.265463917525773) internal successors, (4395), 1940 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 4395 transitions. [2022-03-15 16:22:52,714 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 4395 transitions. Word has length 34 [2022-03-15 16:22:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:52,714 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 4395 transitions. [2022-03-15 16:22:52,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 4395 transitions. [2022-03-15 16:22:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:22:52,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:52,716 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:52,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 16:22:52,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:22:52,923 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1762915409, now seen corresponding path program 42 times [2022-03-15 16:22:52,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:52,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030763271] [2022-03-15 16:22:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:53,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:53,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030763271] [2022-03-15 16:22:53,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030763271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:53,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109448089] [2022-03-15 16:22:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:22:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:53,138 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:22:53,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:22:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:22:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:22:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:53,576 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 16:22:53,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 34 [2022-03-15 16:22:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:53,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:54,154 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:22:54,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:22:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:55,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109448089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:55,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:55,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-03-15 16:22:55,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127979868] [2022-03-15 16:22:55,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:55,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:22:55,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:22:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:22:55,036 INFO L87 Difference]: Start difference. First operand 1941 states and 4395 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:22:55,761 INFO L93 Difference]: Finished difference Result 2951 states and 6561 transitions. [2022-03-15 16:22:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:22:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:22:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:22:55,765 INFO L225 Difference]: With dead ends: 2951 [2022-03-15 16:22:55,765 INFO L226 Difference]: Without dead ends: 2901 [2022-03-15 16:22:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=1788, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:22:55,765 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 184 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:22:55,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 775 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:22:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-03-15 16:22:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 1951. [2022-03-15 16:22:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 2.263076923076923) internal successors, (4413), 1950 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 4413 transitions. [2022-03-15 16:22:55,794 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 4413 transitions. Word has length 34 [2022-03-15 16:22:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:22:55,794 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 4413 transitions. [2022-03-15 16:22:55,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:22:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 4413 transitions. [2022-03-15 16:22:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:22:55,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:22:55,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:22:55,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 16:22:56,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:22:56,011 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:22:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:22:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -954800038, now seen corresponding path program 43 times [2022-03-15 16:22:56,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:22:56,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5214573] [2022-03-15 16:22:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:22:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:22:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:56,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:22:56,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5214573] [2022-03-15 16:22:56,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5214573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:22:56,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113344053] [2022-03-15 16:22:56,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:22:56,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:22:56,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:22:56,252 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:22:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:22:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:22:56,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:22:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:22:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:56,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:22:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:22:56,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:22:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:56,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:22:57,760 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:22:57,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:22:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:22:58,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113344053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:22:58,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:22:58,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 16:22:58,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889668897] [2022-03-15 16:22:58,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:22:58,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:22:58,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:22:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:22:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:22:58,860 INFO L87 Difference]: Start difference. First operand 1951 states and 4413 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:00,214 INFO L93 Difference]: Finished difference Result 4136 states and 9235 transitions. [2022-03-15 16:23:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:23:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:00,220 INFO L225 Difference]: With dead ends: 4136 [2022-03-15 16:23:00,220 INFO L226 Difference]: Without dead ends: 4001 [2022-03-15 16:23:00,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=803, Invalid=4309, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:23:00,221 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 325 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:00,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 727 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 543 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-03-15 16:23:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-03-15 16:23:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 1878. [2022-03-15 16:23:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.240809802876931) internal successors, (4206), 1877 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 4206 transitions. [2022-03-15 16:23:00,257 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 4206 transitions. Word has length 35 [2022-03-15 16:23:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:00,257 INFO L470 AbstractCegarLoop]: Abstraction has 1878 states and 4206 transitions. [2022-03-15 16:23:00,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 4206 transitions. [2022-03-15 16:23:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:00,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:00,259 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:00,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:00,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:23:00,475 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 127332090, now seen corresponding path program 44 times [2022-03-15 16:23:00,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:00,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470032317] [2022-03-15 16:23:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:00,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:00,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470032317] [2022-03-15 16:23:00,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470032317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:00,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834823784] [2022-03-15 16:23:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:23:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:00,702 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:00,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:23:00,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:23:00,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:00,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:01,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:01,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:02,228 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:02,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:03,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834823784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:03,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:03,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 16:23:03,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201250070] [2022-03-15 16:23:03,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:03,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:23:03,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:23:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:23:03,245 INFO L87 Difference]: Start difference. First operand 1878 states and 4206 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:04,445 INFO L93 Difference]: Finished difference Result 3758 states and 8289 transitions. [2022-03-15 16:23:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:23:04,445 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:04,450 INFO L225 Difference]: With dead ends: 3758 [2022-03-15 16:23:04,450 INFO L226 Difference]: Without dead ends: 3705 [2022-03-15 16:23:04,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=830, Invalid=3862, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:23:04,451 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 236 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 994 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 617 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-03-15 16:23:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2022-03-15 16:23:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2116. [2022-03-15 16:23:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.2382978723404254) internal successors, (4734), 2115 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 4734 transitions. [2022-03-15 16:23:04,487 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 4734 transitions. Word has length 35 [2022-03-15 16:23:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:04,487 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 4734 transitions. [2022-03-15 16:23:04,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 4734 transitions. [2022-03-15 16:23:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:04,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:04,489 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:04,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:04,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:04,696 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1662856346, now seen corresponding path program 45 times [2022-03-15 16:23:04,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:04,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129622714] [2022-03-15 16:23:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:23:04,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:04,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129622714] [2022-03-15 16:23:04,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129622714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:04,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62589586] [2022-03-15 16:23:04,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:23:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:04,930 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:04,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:23:04,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:23:04,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:04,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:05,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:05,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:06,467 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:06,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:07,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62589586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:07,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:07,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 16:23:07,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449721272] [2022-03-15 16:23:07,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:07,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:23:07,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:23:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:23:07,419 INFO L87 Difference]: Start difference. First operand 2116 states and 4734 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:09,044 INFO L93 Difference]: Finished difference Result 4790 states and 10454 transitions. [2022-03-15 16:23:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:23:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:09,049 INFO L225 Difference]: With dead ends: 4790 [2022-03-15 16:23:09,050 INFO L226 Difference]: Without dead ends: 4209 [2022-03-15 16:23:09,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=670, Invalid=3620, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:23:09,050 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 471 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:09,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1288 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1164 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2022-03-15 16:23:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2022-03-15 16:23:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2195. [2022-03-15 16:23:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.2520510483135827) internal successors, (4941), 2194 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4941 transitions. [2022-03-15 16:23:09,088 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4941 transitions. Word has length 35 [2022-03-15 16:23:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:09,088 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 4941 transitions. [2022-03-15 16:23:09,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4941 transitions. [2022-03-15 16:23:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:09,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:09,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:09,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:23:09,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:09,291 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:09,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1623360970, now seen corresponding path program 46 times [2022-03-15 16:23:09,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:09,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670274902] [2022-03-15 16:23:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:09,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:09,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670274902] [2022-03-15 16:23:09,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670274902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:09,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874042925] [2022-03-15 16:23:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:23:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:09,533 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:09,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:23:09,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:23:09,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:09,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:09,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:10,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:11,058 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:11,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:12,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874042925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:12,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:12,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:23:12,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999110063] [2022-03-15 16:23:12,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:12,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:23:12,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:23:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:23:12,141 INFO L87 Difference]: Start difference. First operand 2195 states and 4941 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:13,382 INFO L93 Difference]: Finished difference Result 4494 states and 10166 transitions. [2022-03-15 16:23:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:23:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:13,388 INFO L225 Difference]: With dead ends: 4494 [2022-03-15 16:23:13,388 INFO L226 Difference]: Without dead ends: 4212 [2022-03-15 16:23:13,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=798, Invalid=3894, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:23:13,389 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 404 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:13,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 958 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 624 Invalid, 0 Unknown, 373 Unchecked, 0.4s Time] [2022-03-15 16:23:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4212 states. [2022-03-15 16:23:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4212 to 1459. [2022-03-15 16:23:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 2.174211248285322) internal successors, (3170), 1458 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 3170 transitions. [2022-03-15 16:23:13,417 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 3170 transitions. Word has length 35 [2022-03-15 16:23:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:13,417 INFO L470 AbstractCegarLoop]: Abstraction has 1459 states and 3170 transitions. [2022-03-15 16:23:13,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 3170 transitions. [2022-03-15 16:23:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:13,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:13,419 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:13,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:13,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:13,619 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 395777034, now seen corresponding path program 47 times [2022-03-15 16:23:13,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:13,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855120824] [2022-03-15 16:23:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:23:13,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:13,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855120824] [2022-03-15 16:23:13,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855120824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:13,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391803406] [2022-03-15 16:23:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:23:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:13,856 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:13,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:23:13,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:23:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:13,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:14,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:14,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:14,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:14,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:15,351 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:15,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:16,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391803406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:16,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:16,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 16:23:16,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339130502] [2022-03-15 16:23:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:16,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:23:16,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:23:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:23:16,494 INFO L87 Difference]: Start difference. First operand 1459 states and 3170 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:17,549 INFO L93 Difference]: Finished difference Result 2688 states and 5687 transitions. [2022-03-15 16:23:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:23:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:17,553 INFO L225 Difference]: With dead ends: 2688 [2022-03-15 16:23:17,553 INFO L226 Difference]: Without dead ends: 2396 [2022-03-15 16:23:17,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:23:17,554 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 379 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:17,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1078 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 994 Invalid, 0 Unknown, 25 Unchecked, 0.5s Time] [2022-03-15 16:23:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-03-15 16:23:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1654. [2022-03-15 16:23:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.173018753781004) internal successors, (3592), 1653 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 3592 transitions. [2022-03-15 16:23:17,577 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 3592 transitions. Word has length 35 [2022-03-15 16:23:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:17,577 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 3592 transitions. [2022-03-15 16:23:17,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 3592 transitions. [2022-03-15 16:23:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:17,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:17,579 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:17,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:17,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:23:17,791 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1974496454, now seen corresponding path program 48 times [2022-03-15 16:23:17,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:17,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671465054] [2022-03-15 16:23:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:17,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:18,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:18,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671465054] [2022-03-15 16:23:18,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671465054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:18,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815053143] [2022-03-15 16:23:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:23:18,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:18,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:18,027 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:18,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:23:18,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:23:18,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:18,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:23:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:18,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:18,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-03-15 16:23:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:18,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:19,531 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:19,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-03-15 16:23:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:20,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815053143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:20,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:20,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 16:23:20,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120879350] [2022-03-15 16:23:20,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:23:20,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:23:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:23:20,605 INFO L87 Difference]: Start difference. First operand 1654 states and 3592 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:21,643 INFO L93 Difference]: Finished difference Result 2853 states and 6115 transitions. [2022-03-15 16:23:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:23:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:21,647 INFO L225 Difference]: With dead ends: 2853 [2022-03-15 16:23:21,647 INFO L226 Difference]: Without dead ends: 2769 [2022-03-15 16:23:21,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=525, Invalid=2781, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:23:21,651 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 218 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:21,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 914 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 731 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2022-03-15 16:23:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-03-15 16:23:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1618. [2022-03-15 16:23:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 2.168212739641311) internal successors, (3506), 1617 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 3506 transitions. [2022-03-15 16:23:21,675 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 3506 transitions. Word has length 35 [2022-03-15 16:23:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 3506 transitions. [2022-03-15 16:23:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 3506 transitions. [2022-03-15 16:23:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:21,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:21,677 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:21,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:21,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 16:23:21,877 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash 356281658, now seen corresponding path program 49 times [2022-03-15 16:23:21,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:21,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579709386] [2022-03-15 16:23:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:22,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:22,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579709386] [2022-03-15 16:23:22,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579709386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:22,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46148770] [2022-03-15 16:23:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:23:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:22,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:22,229 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:22,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:23:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:22,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:22,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:22,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:22,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:22,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:22,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:23,777 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:23,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:24,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46148770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:24,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:24,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:23:24,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881924920] [2022-03-15 16:23:24,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:24,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:23:24,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:23:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:23:24,872 INFO L87 Difference]: Start difference. First operand 1618 states and 3506 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:25,735 INFO L93 Difference]: Finished difference Result 2882 states and 6229 transitions. [2022-03-15 16:23:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 16:23:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:25,738 INFO L225 Difference]: With dead ends: 2882 [2022-03-15 16:23:25,738 INFO L226 Difference]: Without dead ends: 2783 [2022-03-15 16:23:25,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:23:25,738 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 218 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:25,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 840 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 595 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-03-15 16:23:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-03-15 16:23:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1723. [2022-03-15 16:23:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.1759581881533103) internal successors, (3747), 1722 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 3747 transitions. [2022-03-15 16:23:25,761 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 3747 transitions. Word has length 35 [2022-03-15 16:23:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:25,761 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 3747 transitions. [2022-03-15 16:23:25,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 3747 transitions. [2022-03-15 16:23:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:25,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:25,763 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:25,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:25,979 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1096114186, now seen corresponding path program 50 times [2022-03-15 16:23:25,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:25,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743766813] [2022-03-15 16:23:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:26,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:26,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743766813] [2022-03-15 16:23:26,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743766813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:26,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370509323] [2022-03-15 16:23:26,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:23:26,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:26,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:26,217 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:26,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:23:26,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:23:26,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:26,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:26,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:26,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:26,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:26,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:26,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:27,748 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:27,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:28,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370509323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:28,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:28,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:23:28,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423351495] [2022-03-15 16:23:28,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:28,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:23:28,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:23:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:23:28,603 INFO L87 Difference]: Start difference. First operand 1723 states and 3747 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:29,773 INFO L93 Difference]: Finished difference Result 2890 states and 6235 transitions. [2022-03-15 16:23:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:23:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:29,777 INFO L225 Difference]: With dead ends: 2890 [2022-03-15 16:23:29,778 INFO L226 Difference]: Without dead ends: 2860 [2022-03-15 16:23:29,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=658, Invalid=3764, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:23:29,778 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 188 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:29,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1160 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 839 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2022-03-15 16:23:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-03-15 16:23:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1747. [2022-03-15 16:23:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.1781214203894614) internal successors, (3803), 1746 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3803 transitions. [2022-03-15 16:23:29,802 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3803 transitions. Word has length 35 [2022-03-15 16:23:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:29,803 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3803 transitions. [2022-03-15 16:23:29,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3803 transitions. [2022-03-15 16:23:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:29,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:29,804 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:29,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:30,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:23:30,005 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2135634746, now seen corresponding path program 51 times [2022-03-15 16:23:30,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:30,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626630326] [2022-03-15 16:23:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:30,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:30,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626630326] [2022-03-15 16:23:30,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626630326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:30,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803774581] [2022-03-15 16:23:30,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:23:30,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:30,251 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:30,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:23:30,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:23:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:30,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:30,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:30,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:30,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:31,718 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:31,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:32,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803774581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:32,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:32,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-03-15 16:23:32,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243726088] [2022-03-15 16:23:32,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:32,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:23:32,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:23:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:23:32,772 INFO L87 Difference]: Start difference. First operand 1747 states and 3803 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 16:23:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:34,386 INFO L93 Difference]: Finished difference Result 3655 states and 7698 transitions. [2022-03-15 16:23:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:23:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 35 [2022-03-15 16:23:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:34,392 INFO L225 Difference]: With dead ends: 3655 [2022-03-15 16:23:34,392 INFO L226 Difference]: Without dead ends: 3221 [2022-03-15 16:23:34,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=572, Invalid=3210, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:23:34,393 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 491 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:34,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 1570 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1410 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-03-15 16:23:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-03-15 16:23:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 1927. [2022-03-15 16:23:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.1895119418483904) internal successors, (4217), 1926 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 4217 transitions. [2022-03-15 16:23:34,426 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 4217 transitions. Word has length 35 [2022-03-15 16:23:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:34,426 INFO L470 AbstractCegarLoop]: Abstraction has 1927 states and 4217 transitions. [2022-03-15 16:23:34,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 16:23:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 4217 transitions. [2022-03-15 16:23:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:34,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:34,428 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:34,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:34,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 16:23:34,643 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2096139370, now seen corresponding path program 52 times [2022-03-15 16:23:34,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:34,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970669593] [2022-03-15 16:23:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:34,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:34,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970669593] [2022-03-15 16:23:34,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970669593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:34,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513614282] [2022-03-15 16:23:34,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:23:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:34,887 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:34,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:23:34,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:23:34,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:34,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:35,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:35,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:35,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:36,386 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:36,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:37,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513614282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:37,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:37,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:23:37,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711500568] [2022-03-15 16:23:37,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:37,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:23:37,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:23:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:23:37,032 INFO L87 Difference]: Start difference. First operand 1927 states and 4217 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 16:23:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:38,665 INFO L93 Difference]: Finished difference Result 4268 states and 9267 transitions. [2022-03-15 16:23:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:23:38,666 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 35 [2022-03-15 16:23:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:38,671 INFO L225 Difference]: With dead ends: 4268 [2022-03-15 16:23:38,671 INFO L226 Difference]: Without dead ends: 3932 [2022-03-15 16:23:38,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=930, Invalid=4472, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:23:38,672 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 348 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:38,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1333 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1042 Invalid, 0 Unknown, 469 Unchecked, 0.5s Time] [2022-03-15 16:23:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-03-15 16:23:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 1912. [2022-03-15 16:23:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.1805337519623236) internal successors, (4167), 1911 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4167 transitions. [2022-03-15 16:23:38,706 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4167 transitions. Word has length 35 [2022-03-15 16:23:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:38,707 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 4167 transitions. [2022-03-15 16:23:38,707 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 16:23:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4167 transitions. [2022-03-15 16:23:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:38,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:38,708 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:38,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 16:23:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:38,909 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1458995398, now seen corresponding path program 53 times [2022-03-15 16:23:38,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:38,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453343537] [2022-03-15 16:23:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:38,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:39,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:39,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453343537] [2022-03-15 16:23:39,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453343537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:39,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154987935] [2022-03-15 16:23:39,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:23:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:39,182 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:23:39,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:23:39,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:39,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:39,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:39,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:40,738 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:40,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:41,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154987935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:41,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:41,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:23:41,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415960116] [2022-03-15 16:23:41,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:41,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:23:41,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:23:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:23:41,512 INFO L87 Difference]: Start difference. First operand 1912 states and 4167 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 16:23:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:42,617 INFO L93 Difference]: Finished difference Result 3252 states and 7031 transitions. [2022-03-15 16:23:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:23:42,617 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 35 [2022-03-15 16:23:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:42,621 INFO L225 Difference]: With dead ends: 3252 [2022-03-15 16:23:42,621 INFO L226 Difference]: Without dead ends: 3222 [2022-03-15 16:23:42,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=613, Invalid=3293, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:23:42,622 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 242 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:42,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 1073 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 625 Invalid, 0 Unknown, 359 Unchecked, 0.4s Time] [2022-03-15 16:23:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2022-03-15 16:23:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2050. [2022-03-15 16:23:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 2.186920448999512) internal successors, (4481), 2049 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 4481 transitions. [2022-03-15 16:23:42,650 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 4481 transitions. Word has length 35 [2022-03-15 16:23:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 4481 transitions. [2022-03-15 16:23:42,650 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 16:23:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 4481 transitions. [2022-03-15 16:23:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:42,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:42,652 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:42,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:42,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:42,853 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:42,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496970, now seen corresponding path program 54 times [2022-03-15 16:23:42,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:42,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891917458] [2022-03-15 16:23:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:43,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:43,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891917458] [2022-03-15 16:23:43,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891917458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:43,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502228390] [2022-03-15 16:23:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:23:43,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:43,113 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:43,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:23:43,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:23:43,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:43,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:43,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:43,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:43,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:44,570 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:44,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:45,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502228390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:45,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:45,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:23:45,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127353313] [2022-03-15 16:23:45,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:23:45,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:23:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:23:45,602 INFO L87 Difference]: Start difference. First operand 2050 states and 4481 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:46,635 INFO L93 Difference]: Finished difference Result 3617 states and 7865 transitions. [2022-03-15 16:23:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 16:23:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:46,640 INFO L225 Difference]: With dead ends: 3617 [2022-03-15 16:23:46,640 INFO L226 Difference]: Without dead ends: 3572 [2022-03-15 16:23:46,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=648, Invalid=3258, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:23:46,641 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 266 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:46,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 899 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 562 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-03-15 16:23:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2022-03-15 16:23:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2224. [2022-03-15 16:23:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.1938821412505622) internal successors, (4877), 2223 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 4877 transitions. [2022-03-15 16:23:46,672 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 4877 transitions. Word has length 35 [2022-03-15 16:23:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:46,672 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 4877 transitions. [2022-03-15 16:23:46,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 4877 transitions. [2022-03-15 16:23:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:46,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:46,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:46,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:46,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:23:46,875 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1332936966, now seen corresponding path program 55 times [2022-03-15 16:23:46,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:46,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972254303] [2022-03-15 16:23:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:47,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:47,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972254303] [2022-03-15 16:23:47,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972254303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:47,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283694128] [2022-03-15 16:23:47,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:23:47,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:47,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:47,120 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:47,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:23:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:47,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:47,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:47,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:48,593 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:48,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:49,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283694128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:49,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:49,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:23:49,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997776528] [2022-03-15 16:23:49,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:49,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:23:49,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:23:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:23:49,316 INFO L87 Difference]: Start difference. First operand 2224 states and 4877 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:51,520 INFO L93 Difference]: Finished difference Result 5467 states and 11723 transitions. [2022-03-15 16:23:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:23:51,521 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:51,527 INFO L225 Difference]: With dead ends: 5467 [2022-03-15 16:23:51,527 INFO L226 Difference]: Without dead ends: 4948 [2022-03-15 16:23:51,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=862, Invalid=4838, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:23:51,527 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 486 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:51,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1617 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1564 Invalid, 0 Unknown, 110 Unchecked, 0.8s Time] [2022-03-15 16:23:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-03-15 16:23:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 2767. [2022-03-15 16:23:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.2024584237165583) internal successors, (6092), 2766 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 6092 transitions. [2022-03-15 16:23:51,574 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 6092 transitions. Word has length 35 [2022-03-15 16:23:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:51,574 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 6092 transitions. [2022-03-15 16:23:51,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 6092 transitions. [2022-03-15 16:23:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:51,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:51,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:51,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:51,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:51,777 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1388779334, now seen corresponding path program 56 times [2022-03-15 16:23:51,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:51,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879934487] [2022-03-15 16:23:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:23:51,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:51,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879934487] [2022-03-15 16:23:51,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879934487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:51,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031987398] [2022-03-15 16:23:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:23:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:51,983 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:51,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:23:52,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:23:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:52,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:52,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:52,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:53,381 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:53,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:54,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031987398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:54,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:54,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 32 [2022-03-15 16:23:54,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694584447] [2022-03-15 16:23:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:54,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:23:54,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:23:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:23:54,552 INFO L87 Difference]: Start difference. First operand 2767 states and 6092 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:23:56,117 INFO L93 Difference]: Finished difference Result 5618 states and 12121 transitions. [2022-03-15 16:23:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:23:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:23:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:23:56,124 INFO L225 Difference]: With dead ends: 5618 [2022-03-15 16:23:56,124 INFO L226 Difference]: Without dead ends: 5088 [2022-03-15 16:23:56,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=796, Invalid=3626, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:23:56,125 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 584 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:23:56,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1197 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 949 Invalid, 0 Unknown, 245 Unchecked, 0.5s Time] [2022-03-15 16:23:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2022-03-15 16:23:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 2955. [2022-03-15 16:23:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.2109004739336493) internal successors, (6531), 2954 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 6531 transitions. [2022-03-15 16:23:56,178 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 6531 transitions. Word has length 35 [2022-03-15 16:23:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:23:56,178 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 6531 transitions. [2022-03-15 16:23:56,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:23:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 6531 transitions. [2022-03-15 16:23:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:23:56,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:23:56,182 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:23:56,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 16:23:56,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 16:23:56,404 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:23:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:23:56,404 INFO L85 PathProgramCache]: Analyzing trace with hash -285585158, now seen corresponding path program 57 times [2022-03-15 16:23:56,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:23:56,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86370232] [2022-03-15 16:23:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:23:56,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:23:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:23:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:56,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:23:56,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86370232] [2022-03-15 16:23:56,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86370232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:23:56,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779398478] [2022-03-15 16:23:56,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:23:56,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:23:56,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:23:56,663 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:23:56,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:23:56,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:23:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:23:56,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:23:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:23:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:23:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:23:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:23:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:57,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:23:58,103 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:23:58,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:23:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:23:58,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779398478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:23:58,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:23:58,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2022-03-15 16:23:58,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178534598] [2022-03-15 16:23:58,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:23:58,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:23:58,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:23:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:23:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:23:58,951 INFO L87 Difference]: Start difference. First operand 2955 states and 6531 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:00,589 INFO L93 Difference]: Finished difference Result 5975 states and 12874 transitions. [2022-03-15 16:24:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:24:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:00,597 INFO L225 Difference]: With dead ends: 5975 [2022-03-15 16:24:00,598 INFO L226 Difference]: Without dead ends: 5495 [2022-03-15 16:24:00,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=3115, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:24:00,598 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 446 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:00,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 1423 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1377 Invalid, 0 Unknown, 123 Unchecked, 0.7s Time] [2022-03-15 16:24:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-03-15 16:24:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 2999. [2022-03-15 16:24:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.208138759172782) internal successors, (6620), 2998 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 6620 transitions. [2022-03-15 16:24:00,661 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 6620 transitions. Word has length 35 [2022-03-15 16:24:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:00,661 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 6620 transitions. [2022-03-15 16:24:00,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 6620 transitions. [2022-03-15 16:24:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:00,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:00,664 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:00,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-15 16:24:00,867 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 414751994, now seen corresponding path program 58 times [2022-03-15 16:24:00,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:00,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973826710] [2022-03-15 16:24:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:01,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:01,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973826710] [2022-03-15 16:24:01,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973826710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:01,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651647622] [2022-03-15 16:24:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:01,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:01,146 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:24:01,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:01,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:01,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:02,584 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:02,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:03,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651647622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:03,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:03,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:24:03,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527188167] [2022-03-15 16:24:03,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:03,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:24:03,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:24:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:24:03,871 INFO L87 Difference]: Start difference. First operand 2999 states and 6620 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:05,113 INFO L93 Difference]: Finished difference Result 5146 states and 11289 transitions. [2022-03-15 16:24:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:24:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:05,120 INFO L225 Difference]: With dead ends: 5146 [2022-03-15 16:24:05,120 INFO L226 Difference]: Without dead ends: 4927 [2022-03-15 16:24:05,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=3400, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:24:05,121 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 308 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:05,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1354 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 946 Invalid, 0 Unknown, 504 Unchecked, 0.4s Time] [2022-03-15 16:24:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2022-03-15 16:24:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3147. [2022-03-15 16:24:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 3146 states have (on average 2.214558169103624) internal successors, (6967), 3146 states have internal predecessors, (6967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 6967 transitions. [2022-03-15 16:24:05,175 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 6967 transitions. Word has length 35 [2022-03-15 16:24:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:05,175 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 6967 transitions. [2022-03-15 16:24:05,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 6967 transitions. [2022-03-15 16:24:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:05,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:05,178 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:05,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 16:24:05,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:05,394 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash -910338166, now seen corresponding path program 59 times [2022-03-15 16:24:05,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:05,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164632802] [2022-03-15 16:24:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:05,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:05,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164632802] [2022-03-15 16:24:05,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164632802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:05,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100268217] [2022-03-15 16:24:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:24:05,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:05,646 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:05,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:24:05,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:24:05,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:05,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 16:24:05,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:06,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 41 [2022-03-15 16:24:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:06,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:06,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:24:06,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 112 treesize of output 284 [2022-03-15 16:24:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:07,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100268217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:07,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:07,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2022-03-15 16:24:07,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836726305] [2022-03-15 16:24:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:07,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:24:07,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:24:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:24:07,220 INFO L87 Difference]: Start difference. First operand 3147 states and 6967 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:09,172 INFO L93 Difference]: Finished difference Result 5025 states and 10723 transitions. [2022-03-15 16:24:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:24:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:09,179 INFO L225 Difference]: With dead ends: 5025 [2022-03-15 16:24:09,179 INFO L226 Difference]: Without dead ends: 4661 [2022-03-15 16:24:09,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=777, Invalid=2763, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:24:09,180 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 631 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 872 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 835 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-03-15 16:24:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2022-03-15 16:24:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3404. [2022-03-15 16:24:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 2.208639435791948) internal successors, (7516), 3403 states have internal predecessors, (7516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 7516 transitions. [2022-03-15 16:24:09,230 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 7516 transitions. Word has length 35 [2022-03-15 16:24:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:09,230 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 7516 transitions. [2022-03-15 16:24:09,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 7516 transitions. [2022-03-15 16:24:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:09,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:09,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:09,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:09,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:09,434 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash 550321546, now seen corresponding path program 60 times [2022-03-15 16:24:09,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:09,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158055295] [2022-03-15 16:24:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:09,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:09,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:09,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158055295] [2022-03-15 16:24:09,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158055295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:09,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179870378] [2022-03-15 16:24:09,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:09,692 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:09,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:24:09,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:24:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:09,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:10,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 39 [2022-03-15 16:24:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:10,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:12,691 INFO L353 Elim1Store]: treesize reduction 63, result has 76.9 percent of original size [2022-03-15 16:24:12,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 40 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 106 treesize of output 255 [2022-03-15 16:24:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:13,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179870378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:13,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:13,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-03-15 16:24:13,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189359834] [2022-03-15 16:24:13,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:13,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:24:13,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:24:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:24:13,236 INFO L87 Difference]: Start difference. First operand 3404 states and 7516 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:16,664 INFO L93 Difference]: Finished difference Result 3803 states and 8346 transitions. [2022-03-15 16:24:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:24:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:16,669 INFO L225 Difference]: With dead ends: 3803 [2022-03-15 16:24:16,669 INFO L226 Difference]: Without dead ends: 3791 [2022-03-15 16:24:16,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:24:16,669 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 225 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1043 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 493 Unchecked, 0.1s Time] [2022-03-15 16:24:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2022-03-15 16:24:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 3523. [2022-03-15 16:24:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 2.2234525837592276) internal successors, (7831), 3522 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 7831 transitions. [2022-03-15 16:24:16,710 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 7831 transitions. Word has length 35 [2022-03-15 16:24:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:16,711 INFO L470 AbstractCegarLoop]: Abstraction has 3523 states and 7831 transitions. [2022-03-15 16:24:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 7831 transitions. [2022-03-15 16:24:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:16,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:16,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:16,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:16,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 16:24:16,914 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -949833542, now seen corresponding path program 61 times [2022-03-15 16:24:16,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:16,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567588441] [2022-03-15 16:24:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:24:17,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:17,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567588441] [2022-03-15 16:24:17,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567588441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:17,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976052615] [2022-03-15 16:24:17,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:24:17,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:17,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:17,187 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:17,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:24:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:17,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:17,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:17,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:17,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:18,653 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:18,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:19,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976052615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:19,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:19,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-15 16:24:19,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486772234] [2022-03-15 16:24:19,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:19,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:24:19,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:24:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:24:19,782 INFO L87 Difference]: Start difference. First operand 3523 states and 7831 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:21,614 INFO L93 Difference]: Finished difference Result 5765 states and 12652 transitions. [2022-03-15 16:24:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:24:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:21,622 INFO L225 Difference]: With dead ends: 5765 [2022-03-15 16:24:21,622 INFO L226 Difference]: Without dead ends: 5453 [2022-03-15 16:24:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1056, Invalid=4950, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:24:21,623 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 346 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:21,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 1472 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1124 Invalid, 0 Unknown, 243 Unchecked, 0.6s Time] [2022-03-15 16:24:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-03-15 16:24:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 3586. [2022-03-15 16:24:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 2.224825662482566) internal successors, (7976), 3585 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 7976 transitions. [2022-03-15 16:24:21,678 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 7976 transitions. Word has length 35 [2022-03-15 16:24:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:21,679 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 7976 transitions. [2022-03-15 16:24:21,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 7976 transitions. [2022-03-15 16:24:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:21,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:21,682 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:21,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:21,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 16:24:21,894 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:21,894 INFO L85 PathProgramCache]: Analyzing trace with hash -210001014, now seen corresponding path program 62 times [2022-03-15 16:24:21,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:21,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032855544] [2022-03-15 16:24:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:21,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:22,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:22,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032855544] [2022-03-15 16:24:22,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032855544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:22,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314798077] [2022-03-15 16:24:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:24:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:22,166 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:24:22,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:24:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:22,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:22,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:22,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:22,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:23,640 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:23,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:24,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314798077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:24,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:24,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-03-15 16:24:24,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543306469] [2022-03-15 16:24:24,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:24,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:24:24,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:24:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:24:24,516 INFO L87 Difference]: Start difference. First operand 3586 states and 7976 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:25,827 INFO L93 Difference]: Finished difference Result 5283 states and 11632 transitions. [2022-03-15 16:24:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:24:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:25,834 INFO L225 Difference]: With dead ends: 5283 [2022-03-15 16:24:25,834 INFO L226 Difference]: Without dead ends: 5238 [2022-03-15 16:24:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=697, Invalid=3463, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:24:25,835 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 271 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:25,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1385 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 944 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2022-03-15 16:24:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2022-03-15 16:24:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3736. [2022-03-15 16:24:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 2.23239625167336) internal successors, (8338), 3735 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 8338 transitions. [2022-03-15 16:24:25,888 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 8338 transitions. Word has length 35 [2022-03-15 16:24:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 8338 transitions. [2022-03-15 16:24:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 8338 transitions. [2022-03-15 16:24:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 16:24:25,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:25,892 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:25,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 16:24:26,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:26,092 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1249970874, now seen corresponding path program 63 times [2022-03-15 16:24:26,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:26,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616442434] [2022-03-15 16:24:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:26,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:26,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616442434] [2022-03-15 16:24:26,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616442434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:26,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509175363] [2022-03-15 16:24:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:24:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:26,376 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:26,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:24:26,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:24:26,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:26,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:26,864 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 16:24:26,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:26,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:27,751 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:27,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:28,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509175363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:28,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:28,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-03-15 16:24:28,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631410561] [2022-03-15 16:24:28,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:28,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:24:28,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:24:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:24:28,889 INFO L87 Difference]: Start difference. First operand 3736 states and 8338 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:30,224 INFO L93 Difference]: Finished difference Result 5713 states and 12688 transitions. [2022-03-15 16:24:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:24:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 16:24:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:30,232 INFO L225 Difference]: With dead ends: 5713 [2022-03-15 16:24:30,232 INFO L226 Difference]: Without dead ends: 5683 [2022-03-15 16:24:30,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=610, Invalid=3050, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:24:30,232 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 245 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:30,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1357 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:24:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5683 states. [2022-03-15 16:24:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5683 to 3696. [2022-03-15 16:24:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 2.230581867388363) internal successors, (8242), 3695 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 8242 transitions. [2022-03-15 16:24:30,292 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 8242 transitions. Word has length 35 [2022-03-15 16:24:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:30,292 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 8242 transitions. [2022-03-15 16:24:30,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 8242 transitions. [2022-03-15 16:24:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:24:30,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:30,295 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:30,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:24:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:24:30,497 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -550040129, now seen corresponding path program 64 times [2022-03-15 16:24:30,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:30,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062570885] [2022-03-15 16:24:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:24:30,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:30,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062570885] [2022-03-15 16:24:30,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062570885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:30,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815500151] [2022-03-15 16:24:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:30,534 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:30,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:24:30,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 16:24:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:30,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:30,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815500151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:30,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:30,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 16:24:30,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841307946] [2022-03-15 16:24:30,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:30,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:24:30,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:24:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:24:30,651 INFO L87 Difference]: Start difference. First operand 3696 states and 8242 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:30,710 INFO L93 Difference]: Finished difference Result 4782 states and 10779 transitions. [2022-03-15 16:24:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:24:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:24:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:30,716 INFO L225 Difference]: With dead ends: 4782 [2022-03-15 16:24:30,716 INFO L226 Difference]: Without dead ends: 4767 [2022-03-15 16:24:30,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:24:30,717 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:30,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 80 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:24:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-03-15 16:24:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4371. [2022-03-15 16:24:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 2.2496567505720826) internal successors, (9831), 4370 states have internal predecessors, (9831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 9831 transitions. [2022-03-15 16:24:30,770 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 9831 transitions. Word has length 36 [2022-03-15 16:24:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:30,770 INFO L470 AbstractCegarLoop]: Abstraction has 4371 states and 9831 transitions. [2022-03-15 16:24:30,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 9831 transitions. [2022-03-15 16:24:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:24:30,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:30,774 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:30,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:30,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:24:30,979 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -75450097, now seen corresponding path program 65 times [2022-03-15 16:24:30,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:30,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428253236] [2022-03-15 16:24:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:31,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:31,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428253236] [2022-03-15 16:24:31,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428253236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:31,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240292685] [2022-03-15 16:24:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:24:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:31,030 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:31,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:24:31,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:24:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 16:24:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:31,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:31,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240292685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:31,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:31,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-15 16:24:31,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576578774] [2022-03-15 16:24:31,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:31,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:24:31,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:24:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:24:31,163 INFO L87 Difference]: Start difference. First operand 4371 states and 9831 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:31,216 INFO L93 Difference]: Finished difference Result 6001 states and 13669 transitions. [2022-03-15 16:24:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:24:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:24:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:31,224 INFO L225 Difference]: With dead ends: 6001 [2022-03-15 16:24:31,225 INFO L226 Difference]: Without dead ends: 5994 [2022-03-15 16:24:31,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:24:31,225 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:31,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:24:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5994 states. [2022-03-15 16:24:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5994 to 5544. [2022-03-15 16:24:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5544 states, 5543 states have (on average 2.28287930723435) internal successors, (12654), 5543 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5544 states to 5544 states and 12654 transitions. [2022-03-15 16:24:31,298 INFO L78 Accepts]: Start accepts. Automaton has 5544 states and 12654 transitions. Word has length 36 [2022-03-15 16:24:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:31,298 INFO L470 AbstractCegarLoop]: Abstraction has 5544 states and 12654 transitions. [2022-03-15 16:24:31,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5544 states and 12654 transitions. [2022-03-15 16:24:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:31,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:31,302 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:31,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 16:24:31,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:31,503 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -126350153, now seen corresponding path program 66 times [2022-03-15 16:24:31,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:31,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396462577] [2022-03-15 16:24:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:31,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:31,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396462577] [2022-03-15 16:24:31,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396462577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:31,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332673437] [2022-03-15 16:24:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:31,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:31,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:31,784 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:31,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:24:31,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 16:24:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:31,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:24:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:32,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-03-15 16:24:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:32,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:33,435 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:33,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-03-15 16:24:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:34,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332673437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:34,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:34,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 39 [2022-03-15 16:24:34,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286337373] [2022-03-15 16:24:34,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:34,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:24:34,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:24:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:24:34,297 INFO L87 Difference]: Start difference. First operand 5544 states and 12654 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:36,084 INFO L93 Difference]: Finished difference Result 9557 states and 21469 transitions. [2022-03-15 16:24:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:24:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:36,095 INFO L225 Difference]: With dead ends: 9557 [2022-03-15 16:24:36,096 INFO L226 Difference]: Without dead ends: 8975 [2022-03-15 16:24:36,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=937, Invalid=5069, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:24:36,096 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 488 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:36,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1451 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1156 Invalid, 0 Unknown, 442 Unchecked, 0.6s Time] [2022-03-15 16:24:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2022-03-15 16:24:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 5433. [2022-03-15 16:24:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.2790868924889542) internal successors, (12380), 5432 states have internal predecessors, (12380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 12380 transitions. [2022-03-15 16:24:36,179 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 12380 transitions. Word has length 38 [2022-03-15 16:24:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 12380 transitions. [2022-03-15 16:24:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 12380 transitions. [2022-03-15 16:24:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:36,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:36,183 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:36,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 16:24:36,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-15 16:24:36,384 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1118066151, now seen corresponding path program 67 times [2022-03-15 16:24:36,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:36,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126985076] [2022-03-15 16:24:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:36,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:36,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126985076] [2022-03-15 16:24:36,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126985076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:36,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540366161] [2022-03-15 16:24:36,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:24:36,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:36,651 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:36,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:24:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:36,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:37,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:37,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:37,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:38,293 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:38,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:39,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540366161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:39,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:39,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:24:39,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760304074] [2022-03-15 16:24:39,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:24:39,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:24:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:24:39,531 INFO L87 Difference]: Start difference. First operand 5433 states and 12380 transitions. Second operand has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:40,570 INFO L93 Difference]: Finished difference Result 7645 states and 17175 transitions. [2022-03-15 16:24:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:24:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:40,582 INFO L225 Difference]: With dead ends: 7645 [2022-03-15 16:24:40,582 INFO L226 Difference]: Without dead ends: 7615 [2022-03-15 16:24:40,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:24:40,583 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 244 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:40,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1053 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 613 Invalid, 0 Unknown, 422 Unchecked, 0.3s Time] [2022-03-15 16:24:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7615 states. [2022-03-15 16:24:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7615 to 5418. [2022-03-15 16:24:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 5417 states have (on average 2.278936680819642) internal successors, (12345), 5417 states have internal predecessors, (12345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 12345 transitions. [2022-03-15 16:24:40,679 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 12345 transitions. Word has length 38 [2022-03-15 16:24:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:40,679 INFO L470 AbstractCegarLoop]: Abstraction has 5418 states and 12345 transitions. [2022-03-15 16:24:40,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 12345 transitions. [2022-03-15 16:24:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:40,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:40,684 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:40,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:40,887 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 179362343, now seen corresponding path program 68 times [2022-03-15 16:24:40,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:40,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771766205] [2022-03-15 16:24:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:41,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:41,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771766205] [2022-03-15 16:24:41,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771766205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:41,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147710426] [2022-03-15 16:24:41,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:24:41,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:41,157 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:41,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:24:41,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:24:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:41,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:41,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:41,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:41,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:41,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:42,793 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:42,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:43,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147710426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:43,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:43,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:24:43,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996449991] [2022-03-15 16:24:43,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:43,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:24:43,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:24:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:24:43,482 INFO L87 Difference]: Start difference. First operand 5418 states and 12345 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:44,886 INFO L93 Difference]: Finished difference Result 8029 states and 18002 transitions. [2022-03-15 16:24:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:24:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:44,898 INFO L225 Difference]: With dead ends: 8029 [2022-03-15 16:24:44,898 INFO L226 Difference]: Without dead ends: 7999 [2022-03-15 16:24:44,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=835, Invalid=4135, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:24:44,899 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 244 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:44,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1107 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 683 Invalid, 0 Unknown, 310 Unchecked, 0.4s Time] [2022-03-15 16:24:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2022-03-15 16:24:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 5406. [2022-03-15 16:24:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 2.2788159111933397) internal successors, (12317), 5405 states have internal predecessors, (12317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 12317 transitions. [2022-03-15 16:24:44,984 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 12317 transitions. Word has length 38 [2022-03-15 16:24:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:44,985 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 12317 transitions. [2022-03-15 16:24:44,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 12317 transitions. [2022-03-15 16:24:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:44,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:44,988 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:45,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 16:24:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:45,189 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1553836215, now seen corresponding path program 69 times [2022-03-15 16:24:45,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:45,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535528237] [2022-03-15 16:24:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:45,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:45,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535528237] [2022-03-15 16:24:45,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535528237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:45,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208228331] [2022-03-15 16:24:45,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:24:45,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:45,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:45,456 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:45,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:24:45,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:24:45,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:45,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:46,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:46,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:46,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:47,055 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:47,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:48,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208228331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:48,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:48,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:24:48,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749384329] [2022-03-15 16:24:48,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:48,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:24:48,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:24:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:24:48,095 INFO L87 Difference]: Start difference. First operand 5406 states and 12317 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:50,261 INFO L93 Difference]: Finished difference Result 6913 states and 15499 transitions. [2022-03-15 16:24:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:24:50,262 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:50,271 INFO L225 Difference]: With dead ends: 6913 [2022-03-15 16:24:50,272 INFO L226 Difference]: Without dead ends: 6895 [2022-03-15 16:24:50,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1185, Invalid=6647, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:24:50,272 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 272 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:50,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1354 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1036 Invalid, 0 Unknown, 379 Unchecked, 0.6s Time] [2022-03-15 16:24:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2022-03-15 16:24:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 5612. [2022-03-15 16:24:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5612 states, 5611 states have (on average 2.283193726608448) internal successors, (12811), 5611 states have internal predecessors, (12811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 12811 transitions. [2022-03-15 16:24:50,355 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 12811 transitions. Word has length 38 [2022-03-15 16:24:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:50,355 INFO L470 AbstractCegarLoop]: Abstraction has 5612 states and 12811 transitions. [2022-03-15 16:24:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 12811 transitions. [2022-03-15 16:24:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:50,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:50,371 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:50,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 16:24:50,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:50,572 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1601733385, now seen corresponding path program 70 times [2022-03-15 16:24:50,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:50,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55993335] [2022-03-15 16:24:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:50,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:50,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55993335] [2022-03-15 16:24:50,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55993335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:50,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528353880] [2022-03-15 16:24:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:24:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:50,809 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:50,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:24:50,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:24:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:50,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:50,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:51,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:51,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:51,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:52,382 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:52,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:53,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528353880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:53,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:53,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-15 16:24:53,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646422897] [2022-03-15 16:24:53,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:53,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:24:53,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:24:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:24:53,530 INFO L87 Difference]: Start difference. First operand 5612 states and 12811 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:55,339 INFO L93 Difference]: Finished difference Result 9861 states and 22431 transitions. [2022-03-15 16:24:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:24:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:55,352 INFO L225 Difference]: With dead ends: 9861 [2022-03-15 16:24:55,352 INFO L226 Difference]: Without dead ends: 9397 [2022-03-15 16:24:55,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=757, Invalid=4213, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:24:55,353 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 426 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:55,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 1761 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1294 Invalid, 0 Unknown, 453 Unchecked, 0.6s Time] [2022-03-15 16:24:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2022-03-15 16:24:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 6792. [2022-03-15 16:24:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 6791 states have (on average 2.298336032984833) internal successors, (15608), 6791 states have internal predecessors, (15608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 15608 transitions. [2022-03-15 16:24:55,463 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 15608 transitions. Word has length 38 [2022-03-15 16:24:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:55,463 INFO L470 AbstractCegarLoop]: Abstraction has 6792 states and 15608 transitions. [2022-03-15 16:24:55,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 15608 transitions. [2022-03-15 16:24:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:55,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:55,467 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:55,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:24:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 16:24:55,668 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1413514287, now seen corresponding path program 71 times [2022-03-15 16:24:55,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:55,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241080087] [2022-03-15 16:24:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:55,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:55,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241080087] [2022-03-15 16:24:55,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241080087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:55,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298626768] [2022-03-15 16:24:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:24:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:55,940 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:55,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:24:55,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:24:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:55,966 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 16:24:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:24:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:24:56,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:24:56,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 39 [2022-03-15 16:24:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:56,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:24:57,395 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:24:57,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 112 treesize of output 394 [2022-03-15 16:24:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:24:58,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298626768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:24:58,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:24:58,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-15 16:24:58,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179110155] [2022-03-15 16:24:58,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:24:58,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:24:58,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:24:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:24:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:24:58,151 INFO L87 Difference]: Start difference. First operand 6792 states and 15608 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:24:59,217 INFO L93 Difference]: Finished difference Result 9603 states and 21742 transitions. [2022-03-15 16:24:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:24:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 16:24:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:24:59,231 INFO L225 Difference]: With dead ends: 9603 [2022-03-15 16:24:59,231 INFO L226 Difference]: Without dead ends: 9545 [2022-03-15 16:24:59,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=529, Invalid=2441, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:24:59,231 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 235 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:24:59,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 959 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 710 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-03-15 16:24:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2022-03-15 16:24:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 7236. [2022-03-15 16:24:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 2.31596406357982) internal successors, (16756), 7235 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 16756 transitions. [2022-03-15 16:24:59,342 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 16756 transitions. Word has length 38 [2022-03-15 16:24:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:24:59,342 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 16756 transitions. [2022-03-15 16:24:59,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:24:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 16756 transitions. [2022-03-15 16:24:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:24:59,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:24:59,347 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:24:59,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 16:24:59,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:59,547 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:24:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:24:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 378106983, now seen corresponding path program 72 times [2022-03-15 16:24:59,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:24:59,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109912335] [2022-03-15 16:24:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:24:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:24:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:24:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:24:59,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:24:59,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109912335] [2022-03-15 16:24:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109912335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:24:59,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669591362] [2022-03-15 16:24:59,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:24:59,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:24:59,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:24:59,817 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:24:59,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:24:59,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:24:59,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:24:59,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:24:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:00,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 39 [2022-03-15 16:25:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:00,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:01,374 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 16:25:01,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 114 treesize of output 396 [2022-03-15 16:25:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:02,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669591362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:02,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:02,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 35 [2022-03-15 16:25:02,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568960412] [2022-03-15 16:25:02,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:02,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:25:02,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:25:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:25:02,052 INFO L87 Difference]: Start difference. First operand 7236 states and 16756 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 16:25:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:04,308 INFO L93 Difference]: Finished difference Result 11795 states and 26648 transitions. [2022-03-15 16:25:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:25:04,308 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 38 [2022-03-15 16:25:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:04,325 INFO L225 Difference]: With dead ends: 11795 [2022-03-15 16:25:04,325 INFO L226 Difference]: Without dead ends: 11076 [2022-03-15 16:25:04,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=984, Invalid=5178, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:25:04,325 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 515 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:04,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1949 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1459 Invalid, 0 Unknown, 851 Unchecked, 0.7s Time] [2022-03-15 16:25:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-03-15 16:25:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 7037. [2022-03-15 16:25:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 2.3099772598067085) internal successors, (16253), 7036 states have internal predecessors, (16253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 16253 transitions. [2022-03-15 16:25:04,450 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 16253 transitions. Word has length 38 [2022-03-15 16:25:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 7037 states and 16253 transitions. [2022-03-15 16:25:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 16:25:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 16253 transitions. [2022-03-15 16:25:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:04,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:04,454 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:04,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:04,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:04,655 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1281737470, now seen corresponding path program 73 times [2022-03-15 16:25:04,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:04,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220053251] [2022-03-15 16:25:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:04,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:04,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220053251] [2022-03-15 16:25:04,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220053251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:04,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409276774] [2022-03-15 16:25:04,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:25:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:04,924 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:04,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:25:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:04,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:05,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:25:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:05,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:07,048 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:07,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:25:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:08,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409276774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:08,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:08,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 16:25:08,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603992994] [2022-03-15 16:25:08,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:08,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:25:08,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:25:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:08,296 INFO L87 Difference]: Start difference. First operand 7037 states and 16253 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:12,567 INFO L93 Difference]: Finished difference Result 16057 states and 36105 transitions. [2022-03-15 16:25:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-15 16:25:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:12,598 INFO L225 Difference]: With dead ends: 16057 [2022-03-15 16:25:12,599 INFO L226 Difference]: Without dead ends: 15793 [2022-03-15 16:25:12,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6018 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2248, Invalid=15308, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:25:12,600 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 477 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:12,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 1794 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1521 Invalid, 0 Unknown, 320 Unchecked, 0.9s Time] [2022-03-15 16:25:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2022-03-15 16:25:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 8514. [2022-03-15 16:25:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 2.3016562903794195) internal successors, (19594), 8513 states have internal predecessors, (19594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 19594 transitions. [2022-03-15 16:25:12,818 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 19594 transitions. Word has length 39 [2022-03-15 16:25:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:12,818 INFO L470 AbstractCegarLoop]: Abstraction has 8514 states and 19594 transitions. [2022-03-15 16:25:12,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 19594 transitions. [2022-03-15 16:25:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:12,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:12,823 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:12,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 16:25:13,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:25:13,024 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash 92736402, now seen corresponding path program 74 times [2022-03-15 16:25:13,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:13,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544439832] [2022-03-15 16:25:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:13,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:13,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:13,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544439832] [2022-03-15 16:25:13,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544439832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:13,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629600799] [2022-03-15 16:25:13,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:25:13,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:13,291 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:25:13,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:25:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:13,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:14,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:14,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:25:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:15,477 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:15,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:25:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:17,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629600799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:17,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:17,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 16:25:17,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619587039] [2022-03-15 16:25:17,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:17,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:25:17,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:25:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:17,027 INFO L87 Difference]: Start difference. First operand 8514 states and 19594 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:21,394 INFO L93 Difference]: Finished difference Result 15092 states and 34042 transitions. [2022-03-15 16:25:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-15 16:25:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:21,422 INFO L225 Difference]: With dead ends: 15092 [2022-03-15 16:25:21,422 INFO L226 Difference]: Without dead ends: 15016 [2022-03-15 16:25:21,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7126 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2588, Invalid=17434, Unknown=0, NotChecked=0, Total=20022 [2022-03-15 16:25:21,424 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 376 mSDsluCounter, 2649 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:21,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2612 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1711 Invalid, 0 Unknown, 433 Unchecked, 1.0s Time] [2022-03-15 16:25:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2022-03-15 16:25:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 8421. [2022-03-15 16:25:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8421 states, 8420 states have (on average 2.3) internal successors, (19366), 8420 states have internal predecessors, (19366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 19366 transitions. [2022-03-15 16:25:21,603 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 19366 transitions. Word has length 39 [2022-03-15 16:25:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:21,604 INFO L470 AbstractCegarLoop]: Abstraction has 8421 states and 19366 transitions. [2022-03-15 16:25:21,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 19366 transitions. [2022-03-15 16:25:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:21,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:21,609 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:21,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:25:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 16:25:21,809 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -701560062, now seen corresponding path program 75 times [2022-03-15 16:25:21,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:21,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070453217] [2022-03-15 16:25:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:22,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:22,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070453217] [2022-03-15 16:25:22,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070453217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:22,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108742712] [2022-03-15 16:25:22,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:25:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:22,069 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:25:22,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 16:25:22,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:22,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:22,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:22,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:25:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:22,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:24,280 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:24,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:25:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:27,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108742712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:27,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:27,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 16:25:27,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249976285] [2022-03-15 16:25:27,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:27,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:25:27,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:25:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:25:27,040 INFO L87 Difference]: Start difference. First operand 8421 states and 19366 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:29,218 INFO L93 Difference]: Finished difference Result 12776 states and 28757 transitions. [2022-03-15 16:25:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:25:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:29,237 INFO L225 Difference]: With dead ends: 12776 [2022-03-15 16:25:29,237 INFO L226 Difference]: Without dead ends: 12264 [2022-03-15 16:25:29,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=750, Invalid=4800, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:25:29,237 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 648 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:29,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1587 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1491 Invalid, 0 Unknown, 148 Unchecked, 0.8s Time] [2022-03-15 16:25:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2022-03-15 16:25:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 9219. [2022-03-15 16:25:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9219 states, 9218 states have (on average 2.305272293339119) internal successors, (21250), 9218 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9219 states to 9219 states and 21250 transitions. [2022-03-15 16:25:29,392 INFO L78 Accepts]: Start accepts. Automaton has 9219 states and 21250 transitions. Word has length 39 [2022-03-15 16:25:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:29,392 INFO L470 AbstractCegarLoop]: Abstraction has 9219 states and 21250 transitions. [2022-03-15 16:25:29,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9219 states and 21250 transitions. [2022-03-15 16:25:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:29,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:29,397 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:29,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:29,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:29,599 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1714264178, now seen corresponding path program 76 times [2022-03-15 16:25:29,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:29,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592514224] [2022-03-15 16:25:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:29,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:29,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:29,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592514224] [2022-03-15 16:25:29,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592514224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:29,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534345082] [2022-03-15 16:25:29,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:25:29,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:29,883 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:29,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:25:29,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:25:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:29,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:30,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:30,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:30,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:25:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:30,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:32,038 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:32,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:25:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:33,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534345082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:33,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:33,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 16:25:33,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478333337] [2022-03-15 16:25:33,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:33,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:25:33,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:25:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:25:33,639 INFO L87 Difference]: Start difference. First operand 9219 states and 21250 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:36,889 INFO L93 Difference]: Finished difference Result 17075 states and 38717 transitions. [2022-03-15 16:25:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:25:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:36,920 INFO L225 Difference]: With dead ends: 17075 [2022-03-15 16:25:36,920 INFO L226 Difference]: Without dead ends: 16524 [2022-03-15 16:25:36,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1654, Invalid=9902, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 16:25:36,921 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 595 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:36,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1539 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1487 Invalid, 0 Unknown, 425 Unchecked, 0.8s Time] [2022-03-15 16:25:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16524 states. [2022-03-15 16:25:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16524 to 7396. [2022-03-15 16:25:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7396 states, 7395 states have (on average 2.2580121703853955) internal successors, (16698), 7395 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7396 states to 7396 states and 16698 transitions. [2022-03-15 16:25:37,133 INFO L78 Accepts]: Start accepts. Automaton has 7396 states and 16698 transitions. Word has length 39 [2022-03-15 16:25:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:37,133 INFO L470 AbstractCegarLoop]: Abstraction has 7396 states and 16698 transitions. [2022-03-15 16:25:37,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7396 states and 16698 transitions. [2022-03-15 16:25:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:37,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:37,138 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:37,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 16:25:37,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:37,352 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1206229246, now seen corresponding path program 77 times [2022-03-15 16:25:37,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:37,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406577538] [2022-03-15 16:25:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:37,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:37,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406577538] [2022-03-15 16:25:37,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406577538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:37,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062552085] [2022-03-15 16:25:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:25:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:37,626 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:37,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:25:37,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:25:37,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:37,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:40,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:40,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 44 [2022-03-15 16:25:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:43,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:43,441 INFO L353 Elim1Store]: treesize reduction 83, result has 77.1 percent of original size [2022-03-15 16:25:43,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 34 case distinctions, treesize of input 124 treesize of output 331 [2022-03-15 16:25:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:44,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062552085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:44,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:44,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 16:25:44,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610619095] [2022-03-15 16:25:44,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:44,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:25:44,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:25:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:25:44,509 INFO L87 Difference]: Start difference. First operand 7396 states and 16698 transitions. Second operand has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:49,206 INFO L93 Difference]: Finished difference Result 8120 states and 18145 transitions. [2022-03-15 16:25:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:25:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:49,219 INFO L225 Difference]: With dead ends: 8120 [2022-03-15 16:25:49,219 INFO L226 Difference]: Without dead ends: 8107 [2022-03-15 16:25:49,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=681, Invalid=3609, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:25:49,220 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 272 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:49,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1076 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 452 Unchecked, 0.1s Time] [2022-03-15 16:25:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2022-03-15 16:25:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 7707. [2022-03-15 16:25:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 2.252011419672982) internal successors, (17354), 7706 states have internal predecessors, (17354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 17354 transitions. [2022-03-15 16:25:49,343 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 17354 transitions. Word has length 39 [2022-03-15 16:25:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:49,343 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 17354 transitions. [2022-03-15 16:25:49,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 17354 transitions. [2022-03-15 16:25:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:49,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:49,349 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:49,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:49,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 16:25:49,549 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:49,550 INFO L85 PathProgramCache]: Analyzing trace with hash -788654638, now seen corresponding path program 78 times [2022-03-15 16:25:49,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:49,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907552960] [2022-03-15 16:25:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:49,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:49,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:49,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907552960] [2022-03-15 16:25:49,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907552960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:49,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366766339] [2022-03-15 16:25:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:25:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:49,850 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:49,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:25:49,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:25:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:25:49,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:25:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:50,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:50,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-03-15 16:25:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:50,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:52,113 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:52,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:25:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:54,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366766339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:25:54,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:25:54,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 16:25:54,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726383208] [2022-03-15 16:25:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:25:54,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:25:54,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:25:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:25:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:25:54,716 INFO L87 Difference]: Start difference. First operand 7707 states and 17354 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:25:56,728 INFO L93 Difference]: Finished difference Result 12919 states and 29043 transitions. [2022-03-15 16:25:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:25:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:25:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:25:56,751 INFO L225 Difference]: With dead ends: 12919 [2022-03-15 16:25:56,751 INFO L226 Difference]: Without dead ends: 12834 [2022-03-15 16:25:56,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1255, Invalid=6935, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:25:56,751 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 324 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:25:56,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1075 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 732 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2022-03-15 16:25:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-15 16:25:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 5357. [2022-03-15 16:25:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 5356 states have (on average 2.251493651979089) internal successors, (12059), 5356 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 12059 transitions. [2022-03-15 16:25:56,869 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 12059 transitions. Word has length 39 [2022-03-15 16:25:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:25:56,869 INFO L470 AbstractCegarLoop]: Abstraction has 5357 states and 12059 transitions. [2022-03-15 16:25:56,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:25:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 12059 transitions. [2022-03-15 16:25:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:25:56,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:25:56,873 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:25:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 16:25:57,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:57,080 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:25:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:25:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2087414082, now seen corresponding path program 79 times [2022-03-15 16:25:57,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:25:57,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288822423] [2022-03-15 16:25:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:25:57,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:25:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:57,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:25:57,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288822423] [2022-03-15 16:25:57,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288822423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:25:57,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107042504] [2022-03-15 16:25:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:25:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:25:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:25:57,371 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:25:57,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:25:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:25:57,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:25:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:25:58,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:25:58,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:25:58,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:25:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:25:58,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:25:59,540 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:25:59,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:01,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107042504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:01,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:01,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 16:26:01,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227235700] [2022-03-15 16:26:01,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:26:01,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:26:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:26:01,713 INFO L87 Difference]: Start difference. First operand 5357 states and 12059 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:03,959 INFO L93 Difference]: Finished difference Result 8956 states and 19765 transitions. [2022-03-15 16:26:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:26:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:03,972 INFO L225 Difference]: With dead ends: 8956 [2022-03-15 16:26:03,972 INFO L226 Difference]: Without dead ends: 8462 [2022-03-15 16:26:03,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=896, Invalid=4956, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:26:03,973 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 672 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:03,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1642 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1605 Invalid, 0 Unknown, 119 Unchecked, 0.9s Time] [2022-03-15 16:26:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8462 states. [2022-03-15 16:26:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8462 to 5762. [2022-03-15 16:26:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.2617601110918244) internal successors, (13030), 5761 states have internal predecessors, (13030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13030 transitions. [2022-03-15 16:26:04,072 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13030 transitions. Word has length 39 [2022-03-15 16:26:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:04,072 INFO L470 AbstractCegarLoop]: Abstraction has 5762 states and 13030 transitions. [2022-03-15 16:26:04,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13030 transitions. [2022-03-15 16:26:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:04,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:04,077 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:04,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:04,277 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1582744898, now seen corresponding path program 80 times [2022-03-15 16:26:04,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:04,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519764570] [2022-03-15 16:26:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:04,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:04,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519764570] [2022-03-15 16:26:04,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519764570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:04,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397488319] [2022-03-15 16:26:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:26:04,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:04,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:04,606 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:04,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:26:04,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:26:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:04,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:05,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:06,822 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:06,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:08,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397488319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:08,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:08,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 16:26:08,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739133690] [2022-03-15 16:26:08,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:26:08,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:26:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:26:08,593 INFO L87 Difference]: Start difference. First operand 5762 states and 13030 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:10,770 INFO L93 Difference]: Finished difference Result 8582 states and 19068 transitions. [2022-03-15 16:26:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:26:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:10,783 INFO L225 Difference]: With dead ends: 8582 [2022-03-15 16:26:10,783 INFO L226 Difference]: Without dead ends: 8540 [2022-03-15 16:26:10,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1273, Invalid=7099, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:26:10,784 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 350 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:10,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1383 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 947 Invalid, 0 Unknown, 303 Unchecked, 0.5s Time] [2022-03-15 16:26:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-03-15 16:26:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 6098. [2022-03-15 16:26:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6097 states have (on average 2.264556339183205) internal successors, (13807), 6097 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 13807 transitions. [2022-03-15 16:26:10,879 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 13807 transitions. Word has length 39 [2022-03-15 16:26:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:10,879 INFO L470 AbstractCegarLoop]: Abstraction has 6098 states and 13807 transitions. [2022-03-15 16:26:10,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 13807 transitions. [2022-03-15 16:26:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:10,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:10,883 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:10,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 16:26:11,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-15 16:26:11,084 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 976122898, now seen corresponding path program 81 times [2022-03-15 16:26:11,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:11,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747872409] [2022-03-15 16:26:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:11,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:11,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747872409] [2022-03-15 16:26:11,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747872409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:11,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000929444] [2022-03-15 16:26:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:26:11,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:11,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:11,373 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:11,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:26:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 16:26:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:11,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:12,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:12,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:12,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:13,513 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:13,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:15,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000929444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:15,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:15,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 16:26:15,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713291532] [2022-03-15 16:26:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:15,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:26:15,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:26:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:26:15,709 INFO L87 Difference]: Start difference. First operand 6098 states and 13807 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:17,731 INFO L93 Difference]: Finished difference Result 8931 states and 19767 transitions. [2022-03-15 16:26:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:26:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:17,744 INFO L225 Difference]: With dead ends: 8931 [2022-03-15 16:26:17,745 INFO L226 Difference]: Without dead ends: 8486 [2022-03-15 16:26:17,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=789, Invalid=4467, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:26:17,745 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 569 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:17,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 1626 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1603 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2022-03-15 16:26:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8486 states. [2022-03-15 16:26:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8486 to 6743. [2022-03-15 16:26:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.262681696825868) internal successors, (15255), 6742 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 15255 transitions. [2022-03-15 16:26:17,856 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 15255 transitions. Word has length 39 [2022-03-15 16:26:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:17,856 INFO L470 AbstractCegarLoop]: Abstraction has 6743 states and 15255 transitions. [2022-03-15 16:26:17,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 15255 transitions. [2022-03-15 16:26:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:17,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:17,860 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:17,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 16:26:18,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:18,061 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2100683282, now seen corresponding path program 82 times [2022-03-15 16:26:18,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:18,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088674994] [2022-03-15 16:26:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:18,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:18,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088674994] [2022-03-15 16:26:18,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088674994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:18,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876413191] [2022-03-15 16:26:18,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:26:18,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:18,410 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:18,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:26:18,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:26:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:18,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:19,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:19,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:19,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:20,582 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:20,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:22,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876413191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:22,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:22,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 16:26:22,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288921464] [2022-03-15 16:26:22,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:22,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:26:22,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:26:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:26:22,022 INFO L87 Difference]: Start difference. First operand 6743 states and 15255 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:24,155 INFO L93 Difference]: Finished difference Result 12342 states and 27425 transitions. [2022-03-15 16:26:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:26:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:24,173 INFO L225 Difference]: With dead ends: 12342 [2022-03-15 16:26:24,174 INFO L226 Difference]: Without dead ends: 12080 [2022-03-15 16:26:24,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1068, Invalid=6414, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:26:24,174 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 437 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:24,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1278 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1032 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2022-03-15 16:26:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2022-03-15 16:26:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 6527. [2022-03-15 16:26:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 2.265093472264787) internal successors, (14782), 6526 states have internal predecessors, (14782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 14782 transitions. [2022-03-15 16:26:24,300 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 14782 transitions. Word has length 39 [2022-03-15 16:26:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:24,300 INFO L470 AbstractCegarLoop]: Abstraction has 6527 states and 14782 transitions. [2022-03-15 16:26:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 14782 transitions. [2022-03-15 16:26:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:24,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:24,304 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:24,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:26:24,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:24,505 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 471453714, now seen corresponding path program 83 times [2022-03-15 16:26:24,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:24,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388055014] [2022-03-15 16:26:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:24,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:24,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:24,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388055014] [2022-03-15 16:26:24,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388055014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:24,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871172987] [2022-03-15 16:26:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:26:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:24,825 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:24,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:26:24,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:26:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:24,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:26:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:25,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 32 [2022-03-15 16:26:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:25,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:26,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:26:26,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-03-15 16:26:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:27,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871172987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:27,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:27,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-03-15 16:26:27,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845638027] [2022-03-15 16:26:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:26:27,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:26:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1744, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:26:27,437 INFO L87 Difference]: Start difference. First operand 6527 states and 14782 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:32,816 INFO L93 Difference]: Finished difference Result 9781 states and 21718 transitions. [2022-03-15 16:26:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 16:26:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:32,831 INFO L225 Difference]: With dead ends: 9781 [2022-03-15 16:26:32,831 INFO L226 Difference]: Without dead ends: 9498 [2022-03-15 16:26:32,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4107 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2153, Invalid=10729, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:26:32,832 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 544 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:32,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1667 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1290 Invalid, 0 Unknown, 274 Unchecked, 0.9s Time] [2022-03-15 16:26:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9498 states. [2022-03-15 16:26:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9498 to 7128. [2022-03-15 16:26:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 2.267574014311772) internal successors, (16161), 7127 states have internal predecessors, (16161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 16161 transitions. [2022-03-15 16:26:32,981 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 16161 transitions. Word has length 39 [2022-03-15 16:26:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:32,981 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 16161 transitions. [2022-03-15 16:26:32,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 16161 transitions. [2022-03-15 16:26:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:32,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:32,985 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:33,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 16:26:33,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 16:26:33,198 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash 130470786, now seen corresponding path program 84 times [2022-03-15 16:26:33,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:33,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123839856] [2022-03-15 16:26:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:33,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:33,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:33,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123839856] [2022-03-15 16:26:33,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123839856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:33,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051168335] [2022-03-15 16:26:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:26:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:33,528 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:26:33,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:26:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:33,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:26:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:34,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:34,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-03-15 16:26:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:34,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:35,733 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:35,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:37,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051168335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:37,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:37,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 16:26:37,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928698683] [2022-03-15 16:26:37,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:26:37,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:26:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:26:37,332 INFO L87 Difference]: Start difference. First operand 7128 states and 16161 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:39,126 INFO L93 Difference]: Finished difference Result 10175 states and 22746 transitions. [2022-03-15 16:26:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:26:39,126 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:39,141 INFO L225 Difference]: With dead ends: 10175 [2022-03-15 16:26:39,141 INFO L226 Difference]: Without dead ends: 10138 [2022-03-15 16:26:39,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=923, Invalid=6049, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:26:39,142 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 344 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:39,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1392 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 973 Invalid, 0 Unknown, 310 Unchecked, 0.6s Time] [2022-03-15 16:26:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2022-03-15 16:26:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 7107. [2022-03-15 16:26:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 2.267098226850549) internal successors, (16110), 7106 states have internal predecessors, (16110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 16110 transitions. [2022-03-15 16:26:39,260 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 16110 transitions. Word has length 39 [2022-03-15 16:26:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:39,260 INFO L470 AbstractCegarLoop]: Abstraction has 7107 states and 16110 transitions. [2022-03-15 16:26:39,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 16110 transitions. [2022-03-15 16:26:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:39,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:39,265 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:39,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 16:26:39,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:39,465 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2088252302, now seen corresponding path program 85 times [2022-03-15 16:26:39,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:39,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103859928] [2022-03-15 16:26:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:39,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:39,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103859928] [2022-03-15 16:26:39,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103859928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:39,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992299258] [2022-03-15 16:26:39,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:26:39,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:39,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:39,825 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:39,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:26:39,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:40,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:40,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:40,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:42,005 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:42,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:43,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992299258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:43,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:43,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-03-15 16:26:43,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116122654] [2022-03-15 16:26:43,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:43,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:26:43,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:26:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:26:43,985 INFO L87 Difference]: Start difference. First operand 7107 states and 16110 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:46,195 INFO L93 Difference]: Finished difference Result 13150 states and 29651 transitions. [2022-03-15 16:26:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:26:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:46,218 INFO L225 Difference]: With dead ends: 13150 [2022-03-15 16:26:46,218 INFO L226 Difference]: Without dead ends: 12710 [2022-03-15 16:26:46,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1268, Invalid=6388, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:26:46,219 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 472 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:46,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1338 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1048 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2022-03-15 16:26:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2022-03-15 16:26:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 4841. [2022-03-15 16:26:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4840 states have (on average 2.2264462809917354) internal successors, (10776), 4840 states have internal predecessors, (10776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 10776 transitions. [2022-03-15 16:26:46,344 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 10776 transitions. Word has length 39 [2022-03-15 16:26:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:46,344 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 10776 transitions. [2022-03-15 16:26:46,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 10776 transitions. [2022-03-15 16:26:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:46,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:46,349 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:46,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:26:46,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:46,558 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1095423810, now seen corresponding path program 86 times [2022-03-15 16:26:46,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:46,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998598009] [2022-03-15 16:26:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:46,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:46,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998598009] [2022-03-15 16:26:46,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998598009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:46,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097637988] [2022-03-15 16:26:46,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:26:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:46,904 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:26:46,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:26:46,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:46,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:47,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:49,065 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:49,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:50,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097637988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:50,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:50,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-03-15 16:26:50,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373715251] [2022-03-15 16:26:50,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:50,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:26:50,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:26:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:26:50,611 INFO L87 Difference]: Start difference. First operand 4841 states and 10776 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:26:53,869 INFO L93 Difference]: Finished difference Result 10258 states and 22574 transitions. [2022-03-15 16:26:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 16:26:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:26:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:26:53,885 INFO L225 Difference]: With dead ends: 10258 [2022-03-15 16:26:53,885 INFO L226 Difference]: Without dead ends: 10072 [2022-03-15 16:26:53,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1882, Invalid=9890, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:26:53,886 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 440 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:26:53,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1861 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1330 Invalid, 0 Unknown, 621 Unchecked, 0.8s Time] [2022-03-15 16:26:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2022-03-15 16:26:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 4872. [2022-03-15 16:26:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 2.2311640320262778) internal successors, (10868), 4871 states have internal predecessors, (10868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 10868 transitions. [2022-03-15 16:26:53,994 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 10868 transitions. Word has length 39 [2022-03-15 16:26:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:26:53,994 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 10868 transitions. [2022-03-15 16:26:53,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:26:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 10868 transitions. [2022-03-15 16:26:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:26:53,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:26:53,998 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:26:54,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 16:26:54,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:54,214 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:26:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:26:54,215 INFO L85 PathProgramCache]: Analyzing trace with hash 754440882, now seen corresponding path program 87 times [2022-03-15 16:26:54,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:26:54,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088452710] [2022-03-15 16:26:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:26:54,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:26:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:26:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:54,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:26:54,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088452710] [2022-03-15 16:26:54,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088452710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:26:54,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725028659] [2022-03-15 16:26:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:26:54,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:26:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:26:54,542 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:26:54,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:26:54,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:26:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:26:54,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:26:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:26:55,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:26:55,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:55,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:26:55,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:26:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:26:56,727 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:26:56,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:26:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:26:58,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725028659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:26:58,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:26:58,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2022-03-15 16:26:58,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251969967] [2022-03-15 16:26:58,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:26:58,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:26:58,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:26:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:26:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:26:58,509 INFO L87 Difference]: Start difference. First operand 4872 states and 10868 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:03,185 INFO L93 Difference]: Finished difference Result 8395 states and 18450 transitions. [2022-03-15 16:27:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-15 16:27:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:03,198 INFO L225 Difference]: With dead ends: 8395 [2022-03-15 16:27:03,198 INFO L226 Difference]: Without dead ends: 8352 [2022-03-15 16:27:03,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6258 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2905, Invalid=16555, Unknown=0, NotChecked=0, Total=19460 [2022-03-15 16:27:03,200 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 311 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:03,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 3013 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1890 Invalid, 0 Unknown, 501 Unchecked, 1.1s Time] [2022-03-15 16:27:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-03-15 16:27:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 5094. [2022-03-15 16:27:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 2.234243078735519) internal successors, (11379), 5093 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 11379 transitions. [2022-03-15 16:27:03,298 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 11379 transitions. Word has length 39 [2022-03-15 16:27:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:03,298 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 11379 transitions. [2022-03-15 16:27:03,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 43 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 11379 transitions. [2022-03-15 16:27:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:03,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:03,302 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:03,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-15 16:27:03,503 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:03,503 INFO L85 PathProgramCache]: Analyzing trace with hash -13136430, now seen corresponding path program 88 times [2022-03-15 16:27:03,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:03,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827830157] [2022-03-15 16:27:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:03,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:03,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827830157] [2022-03-15 16:27:03,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827830157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:03,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287108097] [2022-03-15 16:27:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:27:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:03,803 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:03,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:27:03,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:27:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:03,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:03,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:04,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:04,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:05,899 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:05,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:08,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287108097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:08,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:08,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-15 16:27:08,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823290027] [2022-03-15 16:27:08,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:08,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:27:08,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:27:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:27:08,349 INFO L87 Difference]: Start difference. First operand 5094 states and 11379 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:10,778 INFO L93 Difference]: Finished difference Result 8478 states and 18545 transitions. [2022-03-15 16:27:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:27:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:10,788 INFO L225 Difference]: With dead ends: 8478 [2022-03-15 16:27:10,789 INFO L226 Difference]: Without dead ends: 7975 [2022-03-15 16:27:10,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=814, Invalid=4588, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:27:10,789 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 562 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:10,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1946 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1809 Invalid, 0 Unknown, 143 Unchecked, 1.0s Time] [2022-03-15 16:27:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2022-03-15 16:27:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 5874. [2022-03-15 16:27:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5874 states, 5873 states have (on average 2.239570917759237) internal successors, (13153), 5873 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 13153 transitions. [2022-03-15 16:27:10,876 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 13153 transitions. Word has length 39 [2022-03-15 16:27:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:10,876 INFO L470 AbstractCegarLoop]: Abstraction has 5874 states and 13153 transitions. [2022-03-15 16:27:10,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 13153 transitions. [2022-03-15 16:27:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:10,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:10,881 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:10,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 16:27:11,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:11,081 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1892279486, now seen corresponding path program 89 times [2022-03-15 16:27:11,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:11,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897612245] [2022-03-15 16:27:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:27:11,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:11,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897612245] [2022-03-15 16:27:11,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897612245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:11,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506256734] [2022-03-15 16:27:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:27:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:11,398 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:11,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:27:11,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:27:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:11,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:27:11,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:12,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2022-03-15 16:27:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:13,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:13,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:27:13,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-03-15 16:27:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:14,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506256734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:14,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:14,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-03-15 16:27:14,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657716480] [2022-03-15 16:27:14,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:14,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:27:14,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:27:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:27:14,145 INFO L87 Difference]: Start difference. First operand 5874 states and 13153 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:18,210 INFO L93 Difference]: Finished difference Result 10878 states and 23605 transitions. [2022-03-15 16:27:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:27:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:18,223 INFO L225 Difference]: With dead ends: 10878 [2022-03-15 16:27:18,224 INFO L226 Difference]: Without dead ends: 10238 [2022-03-15 16:27:18,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1557, Invalid=6453, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:27:18,224 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 658 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 413 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:18,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1866 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1522 Invalid, 0 Unknown, 413 Unchecked, 1.0s Time] [2022-03-15 16:27:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2022-03-15 16:27:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 6965. [2022-03-15 16:27:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6965 states, 6964 states have (on average 2.2501435956346927) internal successors, (15670), 6964 states have internal predecessors, (15670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 15670 transitions. [2022-03-15 16:27:18,337 INFO L78 Accepts]: Start accepts. Automaton has 6965 states and 15670 transitions. Word has length 39 [2022-03-15 16:27:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:18,337 INFO L470 AbstractCegarLoop]: Abstraction has 6965 states and 15670 transitions. [2022-03-15 16:27:18,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6965 states and 15670 transitions. [2022-03-15 16:27:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:18,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:18,341 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:18,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 16:27:18,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:18,542 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -517805614, now seen corresponding path program 90 times [2022-03-15 16:27:18,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:18,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475133044] [2022-03-15 16:27:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:18,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:18,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475133044] [2022-03-15 16:27:18,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475133044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:18,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605751553] [2022-03-15 16:27:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:27:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:18,864 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:18,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:27:18,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:27:18,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:18,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:19,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:19,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:19,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:20,982 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:20,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:22,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605751553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:22,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:22,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-03-15 16:27:22,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342394388] [2022-03-15 16:27:22,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:22,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:27:22,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:27:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:27:22,695 INFO L87 Difference]: Start difference. First operand 6965 states and 15670 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:24,961 INFO L93 Difference]: Finished difference Result 12330 states and 27409 transitions. [2022-03-15 16:27:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:27:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:24,979 INFO L225 Difference]: With dead ends: 12330 [2022-03-15 16:27:24,979 INFO L226 Difference]: Without dead ends: 11928 [2022-03-15 16:27:24,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1213, Invalid=5927, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:27:24,980 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 462 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 687 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:24,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1795 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1417 Invalid, 0 Unknown, 687 Unchecked, 0.7s Time] [2022-03-15 16:27:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2022-03-15 16:27:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 6186. [2022-03-15 16:27:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 2.242198868229588) internal successors, (13868), 6185 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 13868 transitions. [2022-03-15 16:27:25,102 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 13868 transitions. Word has length 39 [2022-03-15 16:27:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:25,102 INFO L470 AbstractCegarLoop]: Abstraction has 6186 states and 13868 transitions. [2022-03-15 16:27:25,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 13868 transitions. [2022-03-15 16:27:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:25,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:25,106 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:25,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 16:27:25,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:25,307 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -858788542, now seen corresponding path program 91 times [2022-03-15 16:27:25,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:25,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010706654] [2022-03-15 16:27:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:25,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:25,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010706654] [2022-03-15 16:27:25,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010706654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:25,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174412221] [2022-03-15 16:27:25,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:27:25,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:25,625 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:25,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:27:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:25,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:25,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:26,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:26,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:26,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:26,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:26,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:27,757 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:27,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:29,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174412221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:29,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:29,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-03-15 16:27:29,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946009786] [2022-03-15 16:27:29,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:29,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:27:29,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:27:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:27:29,592 INFO L87 Difference]: Start difference. First operand 6186 states and 13868 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:31,373 INFO L93 Difference]: Finished difference Result 10931 states and 24305 transitions. [2022-03-15 16:27:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:27:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:31,389 INFO L225 Difference]: With dead ends: 10931 [2022-03-15 16:27:31,389 INFO L226 Difference]: Without dead ends: 10874 [2022-03-15 16:27:31,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=930, Invalid=5076, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:27:31,390 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 317 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:31,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1259 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 841 Invalid, 0 Unknown, 433 Unchecked, 0.5s Time] [2022-03-15 16:27:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10874 states. [2022-03-15 16:27:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10874 to 6523. [2022-03-15 16:27:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.242256976387611) internal successors, (14624), 6522 states have internal predecessors, (14624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 14624 transitions. [2022-03-15 16:27:31,512 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 14624 transitions. Word has length 39 [2022-03-15 16:27:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:31,512 INFO L470 AbstractCegarLoop]: Abstraction has 6523 states and 14624 transitions. [2022-03-15 16:27:31,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 14624 transitions. [2022-03-15 16:27:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:31,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:31,517 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:31,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:31,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:31,717 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash -798877582, now seen corresponding path program 92 times [2022-03-15 16:27:31,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:31,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139760520] [2022-03-15 16:27:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:32,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:32,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139760520] [2022-03-15 16:27:32,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139760520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:32,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154355357] [2022-03-15 16:27:32,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:27:32,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:32,047 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:32,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:27:32,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:27:32,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:32,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:32,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:32,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:32,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:32,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:32,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:34,141 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:34,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:35,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154355357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:35,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:35,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-03-15 16:27:35,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190893835] [2022-03-15 16:27:35,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:35,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:27:35,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:27:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:27:35,407 INFO L87 Difference]: Start difference. First operand 6523 states and 14624 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:37,886 INFO L93 Difference]: Finished difference Result 12412 states and 27599 transitions. [2022-03-15 16:27:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:27:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:37,906 INFO L225 Difference]: With dead ends: 12412 [2022-03-15 16:27:37,906 INFO L226 Difference]: Without dead ends: 12365 [2022-03-15 16:27:37,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1588, Invalid=8312, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:27:37,908 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 339 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:37,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1447 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 943 Invalid, 0 Unknown, 355 Unchecked, 0.5s Time] [2022-03-15 16:27:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2022-03-15 16:27:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 7081. [2022-03-15 16:27:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 2.239689265536723) internal successors, (15857), 7080 states have internal predecessors, (15857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 15857 transitions. [2022-03-15 16:27:38,049 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 15857 transitions. Word has length 39 [2022-03-15 16:27:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:38,050 INFO L470 AbstractCegarLoop]: Abstraction has 7081 states and 15857 transitions. [2022-03-15 16:27:38,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 15857 transitions. [2022-03-15 16:27:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:38,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:38,054 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:38,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 16:27:38,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 16:27:38,255 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -691098734, now seen corresponding path program 93 times [2022-03-15 16:27:38,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:38,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932336397] [2022-03-15 16:27:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:38,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932336397] [2022-03-15 16:27:38,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932336397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121984948] [2022-03-15 16:27:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:27:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:38,548 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:27:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 16:27:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:38,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:39,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:39,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:39,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:40,536 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:40,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:42,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121984948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:42,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:42,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-03-15 16:27:42,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529672447] [2022-03-15 16:27:42,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:42,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:27:42,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:42,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:27:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:27:42,277 INFO L87 Difference]: Start difference. First operand 7081 states and 15857 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:44,036 INFO L93 Difference]: Finished difference Result 11193 states and 24627 transitions. [2022-03-15 16:27:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:27:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:44,051 INFO L225 Difference]: With dead ends: 11193 [2022-03-15 16:27:44,051 INFO L226 Difference]: Without dead ends: 10775 [2022-03-15 16:27:44,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=642, Invalid=3264, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:27:44,052 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 620 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:44,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1382 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1271 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2022-03-15 16:27:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-03-15 16:27:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 7552. [2022-03-15 16:27:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7552 states, 7551 states have (on average 2.243543901470004) internal successors, (16941), 7551 states have internal predecessors, (16941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7552 states to 7552 states and 16941 transitions. [2022-03-15 16:27:44,178 INFO L78 Accepts]: Start accepts. Automaton has 7552 states and 16941 transitions. Word has length 39 [2022-03-15 16:27:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:44,178 INFO L470 AbstractCegarLoop]: Abstraction has 7552 states and 16941 transitions. [2022-03-15 16:27:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 7552 states and 16941 transitions. [2022-03-15 16:27:44,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:44,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:44,183 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:44,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:44,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-15 16:27:44,384 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1216638574, now seen corresponding path program 94 times [2022-03-15 16:27:44,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:44,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054829424] [2022-03-15 16:27:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:44,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:44,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054829424] [2022-03-15 16:27:44,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054829424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:44,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873384011] [2022-03-15 16:27:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:27:44,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:44,684 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:44,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:27:44,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:27:44,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:44,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:27:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:45,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:45,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:27:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:45,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:46,701 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:46,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:27:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:48,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873384011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:48,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:48,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-03-15 16:27:48,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136860811] [2022-03-15 16:27:48,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:48,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:27:48,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:27:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:27:48,279 INFO L87 Difference]: Start difference. First operand 7552 states and 16941 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:50,265 INFO L93 Difference]: Finished difference Result 12346 states and 27336 transitions. [2022-03-15 16:27:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:27:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:50,288 INFO L225 Difference]: With dead ends: 12346 [2022-03-15 16:27:50,288 INFO L226 Difference]: Without dead ends: 11712 [2022-03-15 16:27:50,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=757, Invalid=3935, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:27:50,288 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 611 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:50,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1545 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1466 Invalid, 0 Unknown, 96 Unchecked, 0.8s Time] [2022-03-15 16:27:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2022-03-15 16:27:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 7834. [2022-03-15 16:27:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7834 states, 7833 states have (on average 2.248563768671007) internal successors, (17613), 7833 states have internal predecessors, (17613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 17613 transitions. [2022-03-15 16:27:50,444 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 17613 transitions. Word has length 39 [2022-03-15 16:27:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:50,444 INFO L470 AbstractCegarLoop]: Abstraction has 7834 states and 17613 transitions. [2022-03-15 16:27:50,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 17613 transitions. [2022-03-15 16:27:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:50,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:50,449 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:50,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:50,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 16:27:50,663 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 545716114, now seen corresponding path program 95 times [2022-03-15 16:27:50,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:50,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790089163] [2022-03-15 16:27:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:50,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:50,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790089163] [2022-03-15 16:27:50,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790089163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:50,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838614867] [2022-03-15 16:27:50,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:27:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:50,966 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:27:50,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:27:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:50,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 16:27:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:51,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2022-03-15 16:27:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:51,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:52,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:27:52,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-03-15 16:27:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:53,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838614867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:27:53,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:27:53,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-03-15 16:27:53,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658586175] [2022-03-15 16:27:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:27:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:27:53,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:27:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:27:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:27:53,425 INFO L87 Difference]: Start difference. First operand 7834 states and 17613 transitions. Second operand has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:27:56,186 INFO L93 Difference]: Finished difference Result 14263 states and 31520 transitions. [2022-03-15 16:27:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:27:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:27:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:27:56,214 INFO L225 Difference]: With dead ends: 14263 [2022-03-15 16:27:56,214 INFO L226 Difference]: Without dead ends: 13773 [2022-03-15 16:27:56,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1093, Invalid=4163, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:27:56,215 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 721 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:27:56,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1290 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1231 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2022-03-15 16:27:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13773 states. [2022-03-15 16:27:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13773 to 9478. [2022-03-15 16:27:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9478 states, 9477 states have (on average 2.245858394006542) internal successors, (21284), 9477 states have internal predecessors, (21284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9478 states to 9478 states and 21284 transitions. [2022-03-15 16:27:56,413 INFO L78 Accepts]: Start accepts. Automaton has 9478 states and 21284 transitions. Word has length 39 [2022-03-15 16:27:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:27:56,413 INFO L470 AbstractCegarLoop]: Abstraction has 9478 states and 21284 transitions. [2022-03-15 16:27:56,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:27:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9478 states and 21284 transitions. [2022-03-15 16:27:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:27:56,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:27:56,418 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:27:56,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 16:27:56,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:56,619 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:27:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:27:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1835060478, now seen corresponding path program 96 times [2022-03-15 16:27:56,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:27:56,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279387677] [2022-03-15 16:27:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:27:56,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:27:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:27:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:56,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:27:56,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279387677] [2022-03-15 16:27:56,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279387677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:27:56,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126939528] [2022-03-15 16:27:56,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:27:56,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:27:56,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:27:56,931 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:27:56,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:27:56,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:27:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:27:56,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:27:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:27:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:27:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:27:57,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 44 [2022-03-15 16:27:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:27:57,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:27:59,000 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:27:59,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:00,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126939528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:00,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:00,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-03-15 16:28:00,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121557496] [2022-03-15 16:28:00,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:00,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:28:00,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:28:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:28:00,849 INFO L87 Difference]: Start difference. First operand 9478 states and 21284 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:03,247 INFO L93 Difference]: Finished difference Result 16669 states and 37110 transitions. [2022-03-15 16:28:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:28:03,247 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:28:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:03,279 INFO L225 Difference]: With dead ends: 16669 [2022-03-15 16:28:03,280 INFO L226 Difference]: Without dead ends: 16504 [2022-03-15 16:28:03,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1098, Invalid=5874, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:28:03,281 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 434 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:03,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1553 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1289 Invalid, 0 Unknown, 144 Unchecked, 0.7s Time] [2022-03-15 16:28:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16504 states. [2022-03-15 16:28:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16504 to 9914. [2022-03-15 16:28:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 2.255321295268839) internal successors, (22357), 9913 states have internal predecessors, (22357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 22357 transitions. [2022-03-15 16:28:03,506 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 22357 transitions. Word has length 39 [2022-03-15 16:28:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:03,506 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 22357 transitions. [2022-03-15 16:28:03,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 22357 transitions. [2022-03-15 16:28:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:03,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:03,512 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:03,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 16:28:03,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 16:28:03,713 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -299935998, now seen corresponding path program 97 times [2022-03-15 16:28:03,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:03,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520690514] [2022-03-15 16:28:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:03,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:04,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:04,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520690514] [2022-03-15 16:28:04,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520690514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:04,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723923612] [2022-03-15 16:28:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:28:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:04,048 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:04,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:28:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:04,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:04,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:04,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:06,078 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:06,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:07,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723923612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:07,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:07,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-03-15 16:28:07,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40096222] [2022-03-15 16:28:07,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:07,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:28:07,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:28:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:28:07,621 INFO L87 Difference]: Start difference. First operand 9914 states and 22357 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:09,807 INFO L93 Difference]: Finished difference Result 14690 states and 32820 transitions. [2022-03-15 16:28:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:28:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:28:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:09,832 INFO L225 Difference]: With dead ends: 14690 [2022-03-15 16:28:09,832 INFO L226 Difference]: Without dead ends: 14626 [2022-03-15 16:28:09,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1205, Invalid=6627, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:28:09,833 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 357 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:09,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1647 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1068 Invalid, 0 Unknown, 625 Unchecked, 0.6s Time] [2022-03-15 16:28:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14626 states. [2022-03-15 16:28:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14626 to 10106. [2022-03-15 16:28:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10106 states, 10105 states have (on average 2.25531914893617) internal successors, (22790), 10105 states have internal predecessors, (22790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 22790 transitions. [2022-03-15 16:28:10,022 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 22790 transitions. Word has length 39 [2022-03-15 16:28:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:10,023 INFO L470 AbstractCegarLoop]: Abstraction has 10106 states and 22790 transitions. [2022-03-15 16:28:10,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 22790 transitions. [2022-03-15 16:28:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:10,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:10,028 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:10,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:28:10,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:10,229 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 455427778, now seen corresponding path program 98 times [2022-03-15 16:28:10,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:10,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962272936] [2022-03-15 16:28:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:10,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:10,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:10,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962272936] [2022-03-15 16:28:10,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962272936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:10,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637271896] [2022-03-15 16:28:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:28:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:10,553 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:10,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:28:10,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:28:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:10,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:11,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:12,522 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:12,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637271896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:14,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:14,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-03-15 16:28:14,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925414424] [2022-03-15 16:28:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:28:14,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:28:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:28:14,870 INFO L87 Difference]: Start difference. First operand 10106 states and 22790 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 16:28:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:16,733 INFO L93 Difference]: Finished difference Result 12375 states and 27512 transitions. [2022-03-15 16:28:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:28:16,734 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 39 [2022-03-15 16:28:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:16,752 INFO L225 Difference]: With dead ends: 12375 [2022-03-15 16:28:16,753 INFO L226 Difference]: Without dead ends: 12019 [2022-03-15 16:28:16,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=607, Invalid=3053, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:28:16,753 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 472 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:16,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1826 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1788 Invalid, 0 Unknown, 158 Unchecked, 0.9s Time] [2022-03-15 16:28:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2022-03-15 16:28:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 10587. [2022-03-15 16:28:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.2577933119214055) internal successors, (23901), 10586 states have internal predecessors, (23901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 23901 transitions. [2022-03-15 16:28:16,969 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 23901 transitions. Word has length 39 [2022-03-15 16:28:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:16,970 INFO L470 AbstractCegarLoop]: Abstraction has 10587 states and 23901 transitions. [2022-03-15 16:28:16,970 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 16:28:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 23901 transitions. [2022-03-15 16:28:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:16,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:16,975 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:16,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 16:28:17,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:28:17,176 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1925348814, now seen corresponding path program 99 times [2022-03-15 16:28:17,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:17,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214292045] [2022-03-15 16:28:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:17,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:17,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214292045] [2022-03-15 16:28:17,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214292045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:17,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498538456] [2022-03-15 16:28:17,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:28:17,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:17,483 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:17,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:28:17,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:28:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:17,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:18,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:18,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:18,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:19,510 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:19,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:21,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498538456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:21,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:21,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-03-15 16:28:21,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127904911] [2022-03-15 16:28:21,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:21,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:28:21,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:28:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:28:21,547 INFO L87 Difference]: Start difference. First operand 10587 states and 23901 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 16:28:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:23,128 INFO L93 Difference]: Finished difference Result 14773 states and 32922 transitions. [2022-03-15 16:28:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:28:23,128 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 39 [2022-03-15 16:28:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:23,153 INFO L225 Difference]: With dead ends: 14773 [2022-03-15 16:28:23,154 INFO L226 Difference]: Without dead ends: 14606 [2022-03-15 16:28:23,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=652, Invalid=3508, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:28:23,154 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 365 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:23,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 1267 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1080 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-03-15 16:28:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14606 states. [2022-03-15 16:28:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14606 to 10494. [2022-03-15 16:28:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 2.2559801772610313) internal successors, (23672), 10493 states have internal predecessors, (23672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 23672 transitions. [2022-03-15 16:28:23,389 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 23672 transitions. Word has length 39 [2022-03-15 16:28:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:23,389 INFO L470 AbstractCegarLoop]: Abstraction has 10494 states and 23672 transitions. [2022-03-15 16:28:23,389 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 16:28:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 23672 transitions. [2022-03-15 16:28:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:23,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:23,395 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:23,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 16:28:23,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:23,595 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1423715278, now seen corresponding path program 100 times [2022-03-15 16:28:23,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:23,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067707722] [2022-03-15 16:28:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:23,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:23,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:23,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067707722] [2022-03-15 16:28:23,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067707722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:23,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226281123] [2022-03-15 16:28:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:28:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:23,935 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:28:23,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:28:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:23,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:24,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:24,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:24,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:25,992 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:25,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:28,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226281123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:28,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:28,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-03-15 16:28:28,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235835510] [2022-03-15 16:28:28,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:28,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:28:28,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:28:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:28:28,016 INFO L87 Difference]: Start difference. First operand 10494 states and 23672 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 16:28:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:30,118 INFO L93 Difference]: Finished difference Result 15142 states and 33727 transitions. [2022-03-15 16:28:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:28:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:28:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:30,144 INFO L225 Difference]: With dead ends: 15142 [2022-03-15 16:28:30,145 INFO L226 Difference]: Without dead ends: 14997 [2022-03-15 16:28:30,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1041, Invalid=5601, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:28:30,146 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 361 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:30,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 1574 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1124 Invalid, 0 Unknown, 393 Unchecked, 0.6s Time] [2022-03-15 16:28:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2022-03-15 16:28:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 10777. [2022-03-15 16:28:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10777 states, 10776 states have (on average 2.2592798812175205) internal successors, (24346), 10776 states have internal predecessors, (24346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10777 states to 10777 states and 24346 transitions. [2022-03-15 16:28:30,350 INFO L78 Accepts]: Start accepts. Automaton has 10777 states and 24346 transitions. Word has length 39 [2022-03-15 16:28:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:30,350 INFO L470 AbstractCegarLoop]: Abstraction has 10777 states and 24346 transitions. [2022-03-15 16:28:30,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 16:28:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10777 states and 24346 transitions. [2022-03-15 16:28:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:30,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:30,356 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:30,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:30,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 16:28:30,556 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -390224334, now seen corresponding path program 101 times [2022-03-15 16:28:30,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:30,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492089073] [2022-03-15 16:28:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:30,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:30,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492089073] [2022-03-15 16:28:30,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492089073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:30,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658076746] [2022-03-15 16:28:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:28:30,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:30,930 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:30,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:28:30,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:28:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:30,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 16:28:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:31,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:31,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-03-15 16:28:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:33,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:28:33,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 372 [2022-03-15 16:28:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:33,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658076746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:33,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:33,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-03-15 16:28:33,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36478546] [2022-03-15 16:28:33,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:33,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:28:33,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:28:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:28:33,845 INFO L87 Difference]: Start difference. First operand 10777 states and 24346 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:44,462 INFO L93 Difference]: Finished difference Result 16482 states and 36607 transitions. [2022-03-15 16:28:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-15 16:28:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:28:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:44,490 INFO L225 Difference]: With dead ends: 16482 [2022-03-15 16:28:44,490 INFO L226 Difference]: Without dead ends: 15997 [2022-03-15 16:28:44,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7667 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3760, Invalid=21680, Unknown=0, NotChecked=0, Total=25440 [2022-03-15 16:28:44,492 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 711 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:44,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2064 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1474 Invalid, 0 Unknown, 696 Unchecked, 1.2s Time] [2022-03-15 16:28:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15997 states. [2022-03-15 16:28:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15997 to 11355. [2022-03-15 16:28:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 2.2595561035758323) internal successors, (25655), 11354 states have internal predecessors, (25655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 25655 transitions. [2022-03-15 16:28:44,712 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 25655 transitions. Word has length 39 [2022-03-15 16:28:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 11355 states and 25655 transitions. [2022-03-15 16:28:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 25655 transitions. [2022-03-15 16:28:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 16:28:44,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:44,718 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:44,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:44,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:44,918 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1924206786, now seen corresponding path program 102 times [2022-03-15 16:28:44,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:44,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164140461] [2022-03-15 16:28:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:45,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:45,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164140461] [2022-03-15 16:28:45,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164140461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:45,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054724934] [2022-03-15 16:28:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:28:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:45,263 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:28:45,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:28:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:45,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:28:45,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:45,912 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 16:28:45,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:45,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:47,231 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:47,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:48,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054724934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:48,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:48,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-03-15 16:28:48,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123420407] [2022-03-15 16:28:48,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:48,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:28:48,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:48,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:28:48,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:28:48,158 INFO L87 Difference]: Start difference. First operand 11355 states and 25655 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:50,386 INFO L93 Difference]: Finished difference Result 16614 states and 37194 transitions. [2022-03-15 16:28:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:28:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 16:28:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:50,413 INFO L225 Difference]: With dead ends: 16614 [2022-03-15 16:28:50,413 INFO L226 Difference]: Without dead ends: 16544 [2022-03-15 16:28:50,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1024, Invalid=5456, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:28:50,414 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 264 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:50,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1776 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 16:28:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16544 states. [2022-03-15 16:28:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16544 to 11299. [2022-03-15 16:28:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.2590724021950788) internal successors, (25523), 11298 states have internal predecessors, (25523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 25523 transitions. [2022-03-15 16:28:50,622 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 25523 transitions. Word has length 39 [2022-03-15 16:28:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:50,622 INFO L470 AbstractCegarLoop]: Abstraction has 11299 states and 25523 transitions. [2022-03-15 16:28:50,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 25523 transitions. [2022-03-15 16:28:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:28:50,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:50,630 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:50,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:50,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:50,830 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:50,830 INFO L85 PathProgramCache]: Analyzing trace with hash -648973305, now seen corresponding path program 103 times [2022-03-15 16:28:50,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:50,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234660924] [2022-03-15 16:28:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:50,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:50,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:50,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234660924] [2022-03-15 16:28:50,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234660924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:50,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256135128] [2022-03-15 16:28:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:28:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:50,882 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:50,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:28:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:28:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:50,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:51,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256135128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:51,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:51,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-15 16:28:51,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979918024] [2022-03-15 16:28:51,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:51,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:28:51,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:28:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:28:51,019 INFO L87 Difference]: Start difference. First operand 11299 states and 25523 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:51,105 INFO L93 Difference]: Finished difference Result 14676 states and 33572 transitions. [2022-03-15 16:28:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:28:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 16:28:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:51,175 INFO L225 Difference]: With dead ends: 14676 [2022-03-15 16:28:51,175 INFO L226 Difference]: Without dead ends: 14668 [2022-03-15 16:28:51,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:28:51,175 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:51,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 100 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:28:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14668 states. [2022-03-15 16:28:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14668 to 13931. [2022-03-15 16:28:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13930 states have (on average 2.294974874371859) internal successors, (31969), 13930 states have internal predecessors, (31969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 31969 transitions. [2022-03-15 16:28:51,379 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 31969 transitions. Word has length 40 [2022-03-15 16:28:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:51,379 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 31969 transitions. [2022-03-15 16:28:51,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 31969 transitions. [2022-03-15 16:28:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:28:51,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:51,388 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:51,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:51,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-03-15 16:28:51,588 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash -719883969, now seen corresponding path program 104 times [2022-03-15 16:28:51,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:51,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851329665] [2022-03-15 16:28:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:51,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:51,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851329665] [2022-03-15 16:28:51,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851329665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:51,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457821570] [2022-03-15 16:28:51,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:28:51,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:51,894 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:51,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:28:51,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:28:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:51,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:52,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:52,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:28:54,024 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:28:54,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:28:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:55,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457821570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:28:55,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:28:55,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-15 16:28:55,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493316838] [2022-03-15 16:28:55,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:28:55,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:28:55,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:28:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:28:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:28:55,537 INFO L87 Difference]: Start difference. First operand 13931 states and 31969 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:28:57,425 INFO L93 Difference]: Finished difference Result 23001 states and 52556 transitions. [2022-03-15 16:28:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:28:57,426 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:28:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:28:57,466 INFO L225 Difference]: With dead ends: 23001 [2022-03-15 16:28:57,466 INFO L226 Difference]: Without dead ends: 22724 [2022-03-15 16:28:57,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=808, Invalid=4594, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:28:57,467 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 326 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:28:57,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1537 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1236 Invalid, 0 Unknown, 387 Unchecked, 0.6s Time] [2022-03-15 16:28:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22724 states. [2022-03-15 16:28:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22724 to 14127. [2022-03-15 16:28:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14127 states, 14126 states have (on average 2.288404360753221) internal successors, (32326), 14126 states have internal predecessors, (32326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14127 states to 14127 states and 32326 transitions. [2022-03-15 16:28:57,767 INFO L78 Accepts]: Start accepts. Automaton has 14127 states and 32326 transitions. Word has length 42 [2022-03-15 16:28:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:28:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 14127 states and 32326 transitions. [2022-03-15 16:28:57,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:28:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14127 states and 32326 transitions. [2022-03-15 16:28:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:28:57,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:28:57,776 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:28:57,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 16:28:57,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:57,977 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:28:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:28:57,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1921076959, now seen corresponding path program 105 times [2022-03-15 16:28:57,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:28:57,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026152638] [2022-03-15 16:28:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:28:57,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:28:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:28:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:58,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:28:58,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026152638] [2022-03-15 16:28:58,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026152638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:28:58,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631342303] [2022-03-15 16:28:58,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:28:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:28:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:28:58,325 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:28:58,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:28:58,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:28:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:28:58,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:28:58,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:28:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:28:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:28:59,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:28:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:28:59,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:00,438 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:29:00,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:29:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:02,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631342303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:02,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:02,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-03-15 16:29:02,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187400] [2022-03-15 16:29:02,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:29:02,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:29:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:29:02,437 INFO L87 Difference]: Start difference. First operand 14127 states and 32326 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:02,987 INFO L93 Difference]: Finished difference Result 14637 states and 33389 transitions. [2022-03-15 16:29:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:29:02,987 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:29:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:03,008 INFO L225 Difference]: With dead ends: 14637 [2022-03-15 16:29:03,008 INFO L226 Difference]: Without dead ends: 14630 [2022-03-15 16:29:03,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=2161, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:29:03,009 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 151 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:03,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1327 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 217 Unchecked, 0.2s Time] [2022-03-15 16:29:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14630 states. [2022-03-15 16:29:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14630 to 14248. [2022-03-15 16:29:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14248 states, 14247 states have (on average 2.2910788236119886) internal successors, (32641), 14247 states have internal predecessors, (32641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14248 states to 14248 states and 32641 transitions. [2022-03-15 16:29:03,207 INFO L78 Accepts]: Start accepts. Automaton has 14248 states and 32641 transitions. Word has length 42 [2022-03-15 16:29:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:03,207 INFO L470 AbstractCegarLoop]: Abstraction has 14248 states and 32641 transitions. [2022-03-15 16:29:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14248 states and 32641 transitions. [2022-03-15 16:29:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 16:29:03,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:03,216 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:03,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 16:29:03,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:03,416 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -913918449, now seen corresponding path program 106 times [2022-03-15 16:29:03,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:03,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104957405] [2022-03-15 16:29:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:03,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:03,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:03,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104957405] [2022-03-15 16:29:03,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104957405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:03,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982096932] [2022-03-15 16:29:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:29:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:03,786 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:29:03,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:29:03,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:03,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 16:29:03,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:04,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 44 [2022-03-15 16:29:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:05,898 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 16:29:05,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 130 treesize of output 528 [2022-03-15 16:29:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:07,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982096932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:07,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:07,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-03-15 16:29:07,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358936416] [2022-03-15 16:29:07,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:07,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:29:07,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:29:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:29:07,379 INFO L87 Difference]: Start difference. First operand 14248 states and 32641 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:10,150 INFO L93 Difference]: Finished difference Result 20753 states and 46931 transitions. [2022-03-15 16:29:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:29:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 16:29:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:10,186 INFO L225 Difference]: With dead ends: 20753 [2022-03-15 16:29:10,187 INFO L226 Difference]: Without dead ends: 20651 [2022-03-15 16:29:10,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1536, Invalid=8564, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:29:10,188 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 327 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 815 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:10,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 2053 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1223 Invalid, 0 Unknown, 815 Unchecked, 0.7s Time] [2022-03-15 16:29:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20651 states. [2022-03-15 16:29:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20651 to 14230. [2022-03-15 16:29:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 2.2911659287370862) internal successors, (32601), 14229 states have internal predecessors, (32601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 32601 transitions. [2022-03-15 16:29:10,462 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 32601 transitions. Word has length 42 [2022-03-15 16:29:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:10,462 INFO L470 AbstractCegarLoop]: Abstraction has 14230 states and 32601 transitions. [2022-03-15 16:29:10,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 32601 transitions. [2022-03-15 16:29:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:10,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:10,471 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:10,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:10,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:10,672 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -621581526, now seen corresponding path program 107 times [2022-03-15 16:29:10,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:10,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945576356] [2022-03-15 16:29:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:11,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:11,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945576356] [2022-03-15 16:29:11,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945576356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:11,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82811274] [2022-03-15 16:29:11,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:29:11,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:11,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:11,033 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:11,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:29:11,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:29:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:11,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-15 16:29:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:12,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 16:29:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:12,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:13,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:13,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:29:13,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 148 treesize of output 472 [2022-03-15 16:29:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:15,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82811274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:15,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:15,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 52 [2022-03-15 16:29:15,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226793725] [2022-03-15 16:29:15,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:15,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-15 16:29:15,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-15 16:29:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2240, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:29:15,199 INFO L87 Difference]: Start difference. First operand 14230 states and 32601 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:26,112 INFO L93 Difference]: Finished difference Result 29284 states and 66268 transitions. [2022-03-15 16:29:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-15 16:29:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:26,162 INFO L225 Difference]: With dead ends: 29284 [2022-03-15 16:29:26,162 INFO L226 Difference]: Without dead ends: 28769 [2022-03-15 16:29:26,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7596 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3281, Invalid=21841, Unknown=0, NotChecked=0, Total=25122 [2022-03-15 16:29:26,163 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 718 mSDsluCounter, 3796 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:26,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 2962 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2262 Invalid, 0 Unknown, 781 Unchecked, 1.5s Time] [2022-03-15 16:29:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2022-03-15 16:29:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 15815. [2022-03-15 16:29:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15815 states, 15814 states have (on average 2.2893006197040595) internal successors, (36203), 15814 states have internal predecessors, (36203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15815 states to 15815 states and 36203 transitions. [2022-03-15 16:29:26,482 INFO L78 Accepts]: Start accepts. Automaton has 15815 states and 36203 transitions. Word has length 43 [2022-03-15 16:29:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:26,482 INFO L470 AbstractCegarLoop]: Abstraction has 15815 states and 36203 transitions. [2022-03-15 16:29:26,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 52 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 15815 states and 36203 transitions. [2022-03-15 16:29:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:26,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:26,492 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:26,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 16:29:26,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 16:29:26,692 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 838390362, now seen corresponding path program 108 times [2022-03-15 16:29:26,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:26,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096368778] [2022-03-15 16:29:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:26,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:27,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:27,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096368778] [2022-03-15 16:29:27,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096368778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:27,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035963598] [2022-03-15 16:29:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:29:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:27,075 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:27,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:29:27,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:29:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:27,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:29:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:28,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:28,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:29:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:28,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:30,051 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:29:30,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:29:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:32,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035963598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:32,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:32,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 16:29:32,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134976143] [2022-03-15 16:29:32,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:32,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:29:32,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:29:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2090, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:29:32,461 INFO L87 Difference]: Start difference. First operand 15815 states and 36203 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:37,499 INFO L93 Difference]: Finished difference Result 31127 states and 70286 transitions. [2022-03-15 16:29:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-15 16:29:37,499 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:37,556 INFO L225 Difference]: With dead ends: 31127 [2022-03-15 16:29:37,556 INFO L226 Difference]: Without dead ends: 31059 [2022-03-15 16:29:37,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7121 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2862, Invalid=18018, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 16:29:37,557 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 386 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:37,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2789 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1948 Invalid, 0 Unknown, 317 Unchecked, 1.1s Time] [2022-03-15 16:29:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31059 states. [2022-03-15 16:29:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31059 to 15572. [2022-03-15 16:29:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15572 states, 15571 states have (on average 2.2897694431956843) internal successors, (35654), 15571 states have internal predecessors, (35654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15572 states to 15572 states and 35654 transitions. [2022-03-15 16:29:37,900 INFO L78 Accepts]: Start accepts. Automaton has 15572 states and 35654 transitions. Word has length 43 [2022-03-15 16:29:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:37,900 INFO L470 AbstractCegarLoop]: Abstraction has 15572 states and 35654 transitions. [2022-03-15 16:29:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 15572 states and 35654 transitions. [2022-03-15 16:29:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:37,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:37,940 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:37,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 16:29:38,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 16:29:38,140 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1774399994, now seen corresponding path program 109 times [2022-03-15 16:29:38,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:38,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522931055] [2022-03-15 16:29:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:38,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:38,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:38,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522931055] [2022-03-15 16:29:38,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522931055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:38,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639546844] [2022-03-15 16:29:38,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:29:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:38,503 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:38,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:29:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:38,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:29:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:39,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:29:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:39,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:41,456 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:29:41,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:29:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:44,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639546844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:44,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:44,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:29:44,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808498113] [2022-03-15 16:29:44,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:44,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:29:44,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:29:44,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:29:44,414 INFO L87 Difference]: Start difference. First operand 15572 states and 35654 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:46,894 INFO L93 Difference]: Finished difference Result 29929 states and 68119 transitions. [2022-03-15 16:29:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:29:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:46,958 INFO L225 Difference]: With dead ends: 29929 [2022-03-15 16:29:46,959 INFO L226 Difference]: Without dead ends: 29517 [2022-03-15 16:29:46,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1350, Invalid=7206, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:29:46,959 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 633 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:46,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1585 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1206 Invalid, 0 Unknown, 355 Unchecked, 0.7s Time] [2022-03-15 16:29:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2022-03-15 16:29:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 13451. [2022-03-15 16:29:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13451 states, 13450 states have (on average 2.275910780669145) internal successors, (30611), 13450 states have internal predecessors, (30611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13451 states to 13451 states and 30611 transitions. [2022-03-15 16:29:47,324 INFO L78 Accepts]: Start accepts. Automaton has 13451 states and 30611 transitions. Word has length 43 [2022-03-15 16:29:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:47,324 INFO L470 AbstractCegarLoop]: Abstraction has 13451 states and 30611 transitions. [2022-03-15 16:29:47,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13451 states and 30611 transitions. [2022-03-15 16:29:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:47,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:47,333 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:47,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 16:29:47,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 16:29:47,533 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1060595414, now seen corresponding path program 110 times [2022-03-15 16:29:47,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:47,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982517683] [2022-03-15 16:29:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:47,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:47,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982517683] [2022-03-15 16:29:47,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982517683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070548286] [2022-03-15 16:29:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:29:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:47,928 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:47,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:29:47,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:29:47,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:47,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:29:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:49,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:29:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:29:50,928 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:29:50,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:29:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:53,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070548286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:29:53,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:29:53,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:29:53,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069129237] [2022-03-15 16:29:53,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:29:53,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:29:53,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:29:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:29:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=2182, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:29:53,883 INFO L87 Difference]: Start difference. First operand 13451 states and 30611 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:29:57,405 INFO L93 Difference]: Finished difference Result 25886 states and 58270 transitions. [2022-03-15 16:29:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 16:29:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:29:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:29:57,457 INFO L225 Difference]: With dead ends: 25886 [2022-03-15 16:29:57,457 INFO L226 Difference]: Without dead ends: 25833 [2022-03-15 16:29:57,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1899, Invalid=11441, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 16:29:57,458 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 464 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:29:57,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1915 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1210 Invalid, 0 Unknown, 440 Unchecked, 0.7s Time] [2022-03-15 16:29:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25833 states. [2022-03-15 16:29:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25833 to 12734. [2022-03-15 16:29:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12734 states, 12733 states have (on average 2.2737768004398022) internal successors, (28952), 12733 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12734 states to 12734 states and 28952 transitions. [2022-03-15 16:29:57,773 INFO L78 Accepts]: Start accepts. Automaton has 12734 states and 28952 transitions. Word has length 43 [2022-03-15 16:29:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:29:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 12734 states and 28952 transitions. [2022-03-15 16:29:57,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:29:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 12734 states and 28952 transitions. [2022-03-15 16:29:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:29:57,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:29:57,782 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:29:57,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 16:29:57,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-15 16:29:57,982 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:29:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:29:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1973677926, now seen corresponding path program 111 times [2022-03-15 16:29:57,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:29:57,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480578638] [2022-03-15 16:29:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:29:57,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:29:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:29:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:58,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:29:58,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480578638] [2022-03-15 16:29:58,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480578638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:29:58,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017046571] [2022-03-15 16:29:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:29:58,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:29:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:29:58,383 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:29:58,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:29:58,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:29:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:29:58,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:29:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:29:59,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:29:59,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:29:59,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:29:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:29:59,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:01,407 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:01,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:03,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017046571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:03,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:03,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:30:03,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132989788] [2022-03-15 16:30:03,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:30:03,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:30:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2178, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:30:03,921 INFO L87 Difference]: Start difference. First operand 12734 states and 28952 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:06,365 INFO L93 Difference]: Finished difference Result 18676 states and 41880 transitions. [2022-03-15 16:30:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:30:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:06,398 INFO L225 Difference]: With dead ends: 18676 [2022-03-15 16:30:06,398 INFO L226 Difference]: Without dead ends: 18639 [2022-03-15 16:30:06,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1309, Invalid=8003, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:30:06,398 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 370 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:06,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1615 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 965 Invalid, 0 Unknown, 363 Unchecked, 0.6s Time] [2022-03-15 16:30:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18639 states. [2022-03-15 16:30:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18639 to 13208. [2022-03-15 16:30:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13208 states, 13207 states have (on average 2.2704626334519573) internal successors, (29986), 13207 states have internal predecessors, (29986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13208 states to 13208 states and 29986 transitions. [2022-03-15 16:30:06,627 INFO L78 Accepts]: Start accepts. Automaton has 13208 states and 29986 transitions. Word has length 43 [2022-03-15 16:30:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:06,627 INFO L470 AbstractCegarLoop]: Abstraction has 13208 states and 29986 transitions. [2022-03-15 16:30:06,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13208 states and 29986 transitions. [2022-03-15 16:30:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:06,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:06,636 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:06,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 16:30:06,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:06,836 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -268972998, now seen corresponding path program 112 times [2022-03-15 16:30:06,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:06,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424475681] [2022-03-15 16:30:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:30:07,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:07,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424475681] [2022-03-15 16:30:07,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424475681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:07,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174995086] [2022-03-15 16:30:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:30:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:07,228 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:07,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:30:07,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:30:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:07,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:08,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:08,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:08,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:10,137 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:10,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:11,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174995086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:11,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:11,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 16:30:11,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338667920] [2022-03-15 16:30:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:30:11,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:30:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:30:11,439 INFO L87 Difference]: Start difference. First operand 13208 states and 29986 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:16,083 INFO L93 Difference]: Finished difference Result 21857 states and 48830 transitions. [2022-03-15 16:30:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:30:16,083 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:16,115 INFO L225 Difference]: With dead ends: 21857 [2022-03-15 16:30:16,115 INFO L226 Difference]: Without dead ends: 20821 [2022-03-15 16:30:16,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5466 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2203, Invalid=14309, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:30:16,116 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 639 mSDsluCounter, 3513 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:16,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 2259 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2130 Invalid, 0 Unknown, 668 Unchecked, 1.3s Time] [2022-03-15 16:30:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20821 states. [2022-03-15 16:30:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20821 to 13850. [2022-03-15 16:30:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13850 states, 13849 states have (on average 2.274243627698751) internal successors, (31496), 13849 states have internal predecessors, (31496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13850 states to 13850 states and 31496 transitions. [2022-03-15 16:30:16,379 INFO L78 Accepts]: Start accepts. Automaton has 13850 states and 31496 transitions. Word has length 43 [2022-03-15 16:30:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:16,379 INFO L470 AbstractCegarLoop]: Abstraction has 13850 states and 31496 transitions. [2022-03-15 16:30:16,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13850 states and 31496 transitions. [2022-03-15 16:30:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:16,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:16,388 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:16,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:16,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:16,589 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1190998890, now seen corresponding path program 113 times [2022-03-15 16:30:16,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:16,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576949293] [2022-03-15 16:30:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:16,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:16,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576949293] [2022-03-15 16:30:16,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576949293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:16,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664559704] [2022-03-15 16:30:16,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:30:16,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:16,973 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:16,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 16:30:16,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 16:30:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:16,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:18,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:19,959 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:19,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:22,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664559704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:22,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:22,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:30:22,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060876831] [2022-03-15 16:30:22,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:22,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:30:22,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:30:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:30:22,724 INFO L87 Difference]: Start difference. First operand 13850 states and 31496 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:23,400 INFO L93 Difference]: Finished difference Result 14553 states and 32950 transitions. [2022-03-15 16:30:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:30:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:23,424 INFO L225 Difference]: With dead ends: 14553 [2022-03-15 16:30:23,424 INFO L226 Difference]: Without dead ends: 14540 [2022-03-15 16:30:23,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=537, Invalid=3245, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 16:30:23,425 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 184 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:23,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1639 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 296 Invalid, 0 Unknown, 246 Unchecked, 0.2s Time] [2022-03-15 16:30:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14540 states. [2022-03-15 16:30:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14540 to 14057. [2022-03-15 16:30:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 2.2771770062606715) internal successors, (32008), 14056 states have internal predecessors, (32008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 32008 transitions. [2022-03-15 16:30:23,653 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 32008 transitions. Word has length 43 [2022-03-15 16:30:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:23,653 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 32008 transitions. [2022-03-15 16:30:23,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 32008 transitions. [2022-03-15 16:30:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:23,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:23,662 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:23,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 16:30:23,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 16:30:23,863 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1138183082, now seen corresponding path program 114 times [2022-03-15 16:30:23,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:23,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583890444] [2022-03-15 16:30:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:23,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:30:24,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:24,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583890444] [2022-03-15 16:30:24,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583890444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:24,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560478923] [2022-03-15 16:30:24,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:30:24,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:24,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:24,223 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:24,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 16:30:24,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:30:24,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:24,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:25,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:25,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:27,125 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:27,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:30,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560478923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:30,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:30,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 46 [2022-03-15 16:30:30,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201952880] [2022-03-15 16:30:30,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:30,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:30:30,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:30:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:30:30,885 INFO L87 Difference]: Start difference. First operand 14057 states and 32008 transitions. Second operand has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:33,044 INFO L93 Difference]: Finished difference Result 16995 states and 38199 transitions. [2022-03-15 16:30:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:30:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:33,073 INFO L225 Difference]: With dead ends: 16995 [2022-03-15 16:30:33,073 INFO L226 Difference]: Without dead ends: 16595 [2022-03-15 16:30:33,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:30:33,073 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 497 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:33,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 1877 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1869 Invalid, 0 Unknown, 194 Unchecked, 1.0s Time] [2022-03-15 16:30:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16595 states. [2022-03-15 16:30:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16595 to 14528. [2022-03-15 16:30:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14528 states, 14527 states have (on average 2.278928891030495) internal successors, (33106), 14527 states have internal predecessors, (33106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14528 states to 14528 states and 33106 transitions. [2022-03-15 16:30:33,332 INFO L78 Accepts]: Start accepts. Automaton has 14528 states and 33106 transitions. Word has length 43 [2022-03-15 16:30:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:33,332 INFO L470 AbstractCegarLoop]: Abstraction has 14528 states and 33106 transitions. [2022-03-15 16:30:33,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 14528 states and 33106 transitions. [2022-03-15 16:30:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:33,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:33,341 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:33,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 16:30:33,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:33,542 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1232090406, now seen corresponding path program 115 times [2022-03-15 16:30:33,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:33,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447815454] [2022-03-15 16:30:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:33,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:33,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447815454] [2022-03-15 16:30:33,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447815454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:33,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190221719] [2022-03-15 16:30:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:30:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:33,884 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:33,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 16:30:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:33,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:34,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:34,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:35,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:36,813 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:36,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:39,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190221719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:39,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:39,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-03-15 16:30:39,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676505439] [2022-03-15 16:30:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:30:39,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:30:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1887, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:30:39,362 INFO L87 Difference]: Start difference. First operand 14528 states and 33106 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:41,408 INFO L93 Difference]: Finished difference Result 18318 states and 41228 transitions. [2022-03-15 16:30:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:30:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:41,440 INFO L225 Difference]: With dead ends: 18318 [2022-03-15 16:30:41,440 INFO L226 Difference]: Without dead ends: 18225 [2022-03-15 16:30:41,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=843, Invalid=4857, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:30:41,440 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 376 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:41,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 1540 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1344 Invalid, 0 Unknown, 121 Unchecked, 0.8s Time] [2022-03-15 16:30:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18225 states. [2022-03-15 16:30:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18225 to 14432. [2022-03-15 16:30:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14432 states, 14431 states have (on average 2.2783590880742843) internal successors, (32879), 14431 states have internal predecessors, (32879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14432 states to 14432 states and 32879 transitions. [2022-03-15 16:30:41,711 INFO L78 Accepts]: Start accepts. Automaton has 14432 states and 32879 transitions. Word has length 43 [2022-03-15 16:30:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:41,711 INFO L470 AbstractCegarLoop]: Abstraction has 14432 states and 32879 transitions. [2022-03-15 16:30:41,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 14432 states and 32879 transitions. [2022-03-15 16:30:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:41,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:41,720 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:41,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 16:30:41,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:41,923 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:41,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1098687706, now seen corresponding path program 116 times [2022-03-15 16:30:41,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:41,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751869750] [2022-03-15 16:30:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:42,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:42,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751869750] [2022-03-15 16:30:42,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751869750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:42,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215128109] [2022-03-15 16:30:42,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:30:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:42,314 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:42,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 16:30:42,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:30:42,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:42,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:43,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:43,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:43,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:45,291 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:45,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:47,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215128109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:47,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:47,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 16:30:47,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021324559] [2022-03-15 16:30:47,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:47,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:30:47,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:30:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2068, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:30:47,690 INFO L87 Difference]: Start difference. First operand 14432 states and 32879 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:30:50,996 INFO L93 Difference]: Finished difference Result 21972 states and 49366 transitions. [2022-03-15 16:30:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:30:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:30:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:30:51,036 INFO L225 Difference]: With dead ends: 21972 [2022-03-15 16:30:51,036 INFO L226 Difference]: Without dead ends: 21836 [2022-03-15 16:30:51,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1570, Invalid=8530, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:30:51,037 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 348 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:30:51,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 2513 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1823 Invalid, 0 Unknown, 315 Unchecked, 1.0s Time] [2022-03-15 16:30:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21836 states. [2022-03-15 16:30:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21836 to 14330. [2022-03-15 16:30:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14330 states, 14329 states have (on average 2.2783167003977947) internal successors, (32646), 14329 states have internal predecessors, (32646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14330 states to 14330 states and 32646 transitions. [2022-03-15 16:30:51,346 INFO L78 Accepts]: Start accepts. Automaton has 14330 states and 32646 transitions. Word has length 43 [2022-03-15 16:30:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:30:51,346 INFO L470 AbstractCegarLoop]: Abstraction has 14330 states and 32646 transitions. [2022-03-15 16:30:51,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:30:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 14330 states and 32646 transitions. [2022-03-15 16:30:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:30:51,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:30:51,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:30:51,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 16:30:51,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-15 16:30:51,556 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:30:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:30:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -996475174, now seen corresponding path program 117 times [2022-03-15 16:30:51,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:30:51,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341118540] [2022-03-15 16:30:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:30:51,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:30:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:30:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:51,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:30:51,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341118540] [2022-03-15 16:30:51,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341118540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:30:51,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134247651] [2022-03-15 16:30:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:30:51,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:30:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:30:51,943 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:30:51,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 16:30:51,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:30:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:30:52,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:30:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:30:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:30:53,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:30:53,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:30:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:53,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:30:54,952 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:30:54,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:30:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:30:57,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134247651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:30:57,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:30:57,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:30:57,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213412239] [2022-03-15 16:30:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:30:57,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:30:57,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:30:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:30:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:30:57,078 INFO L87 Difference]: Start difference. First operand 14330 states and 32646 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:31:00,295 INFO L93 Difference]: Finished difference Result 20828 states and 46823 transitions. [2022-03-15 16:31:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:31:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:31:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:31:00,331 INFO L225 Difference]: With dead ends: 20828 [2022-03-15 16:31:00,331 INFO L226 Difference]: Without dead ends: 20733 [2022-03-15 16:31:00,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1679, Invalid=10977, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 16:31:00,332 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 370 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:00,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 2220 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1448 Invalid, 0 Unknown, 639 Unchecked, 0.9s Time] [2022-03-15 16:31:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20733 states. [2022-03-15 16:31:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20733 to 14388. [2022-03-15 16:31:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14388 states, 14387 states have (on average 2.2774032112323623) internal successors, (32765), 14387 states have internal predecessors, (32765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14388 states to 14388 states and 32765 transitions. [2022-03-15 16:31:00,651 INFO L78 Accepts]: Start accepts. Automaton has 14388 states and 32765 transitions. Word has length 43 [2022-03-15 16:31:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:31:00,652 INFO L470 AbstractCegarLoop]: Abstraction has 14388 states and 32765 transitions. [2022-03-15 16:31:00,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 14388 states and 32765 transitions. [2022-03-15 16:31:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:31:00,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:31:00,659 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:31:00,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 16:31:00,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 16:31:00,860 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:31:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:31:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1312980394, now seen corresponding path program 118 times [2022-03-15 16:31:00,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:31:00,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514250860] [2022-03-15 16:31:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:31:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:31:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:31:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:01,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:31:01,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514250860] [2022-03-15 16:31:01,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514250860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:31:01,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680066187] [2022-03-15 16:31:01,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:31:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:31:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:31:01,279 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:31:01,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 16:31:01,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:31:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:31:01,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-15 16:31:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:31:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:31:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:31:02,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 49 [2022-03-15 16:31:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:02,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:31:04,249 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 16:31:04,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 682 [2022-03-15 16:31:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:06,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680066187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:31:06,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:31:06,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 16:31:06,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494490494] [2022-03-15 16:31:06,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:31:06,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:31:06,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:31:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:31:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2168, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:31:06,962 INFO L87 Difference]: Start difference. First operand 14388 states and 32765 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:31:11,188 INFO L93 Difference]: Finished difference Result 20298 states and 45651 transitions. [2022-03-15 16:31:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:31:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 16:31:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:31:11,220 INFO L225 Difference]: With dead ends: 20298 [2022-03-15 16:31:11,221 INFO L226 Difference]: Without dead ends: 20240 [2022-03-15 16:31:11,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4594 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2077, Invalid=13423, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 16:31:11,221 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 309 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 816 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:31:11,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 2562 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1961 Invalid, 0 Unknown, 816 Unchecked, 1.2s Time] [2022-03-15 16:31:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20240 states. [2022-03-15 16:31:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20240 to 14340. [2022-03-15 16:31:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.2772857242485527) internal successors, (32654), 14339 states have internal predecessors, (32654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 32654 transitions. [2022-03-15 16:31:11,483 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 32654 transitions. Word has length 43 [2022-03-15 16:31:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:31:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 14340 states and 32654 transitions. [2022-03-15 16:31:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:31:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 32654 transitions. [2022-03-15 16:31:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 16:31:11,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:31:11,492 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:31:11,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 16:31:11,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 16:31:11,692 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:31:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:31:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash 341180362, now seen corresponding path program 119 times [2022-03-15 16:31:11,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:31:11,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938625539] [2022-03-15 16:31:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:31:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:31:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:31:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:31:12,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:31:12,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938625539] [2022-03-15 16:31:12,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938625539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:31:12,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613329232] [2022-03-15 16:31:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:31:12,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:31:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:31:12,081 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:31:12,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 16:31:12,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:31:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:31:12,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 16:31:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:32:31,166 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-15 16:32:31,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-15 16:32:31,169 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-15 16:32:31,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 16:32:31,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 16:32:31,371 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 46 more [2022-03-15 16:32:31,372 INFO L158 Benchmark]: Toolchain (without parser) took 671853.20ms. Allocated memory was 189.8MB in the beginning and 746.6MB in the end (delta: 556.8MB). Free memory was 144.6MB in the beginning and 428.4MB in the end (delta: -283.8MB). Peak memory consumption was 273.6MB. Max. memory is 8.0GB. [2022-03-15 16:32:31,372 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 145.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:32:31,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.60ms. Allocated memory is still 189.8MB. Free memory was 144.6MB in the beginning and 143.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:32:31,372 INFO L158 Benchmark]: Boogie Preprocessor took 13.50ms. Allocated memory is still 189.8MB. Free memory was 143.0MB in the beginning and 142.1MB in the end (delta: 908.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 16:32:31,373 INFO L158 Benchmark]: RCFGBuilder took 158.80ms. Allocated memory is still 189.8MB. Free memory was 142.1MB in the beginning and 133.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 16:32:31,373 INFO L158 Benchmark]: TraceAbstraction took 671654.90ms. Allocated memory was 189.8MB in the beginning and 746.6MB in the end (delta: 556.8MB). Free memory was 132.5MB in the beginning and 428.4MB in the end (delta: -295.9MB). Peak memory consumption was 261.0MB. Max. memory is 8.0GB. [2022-03-15 16:32:31,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 145.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.60ms. Allocated memory is still 189.8MB. Free memory was 144.6MB in the beginning and 143.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.50ms. Allocated memory is still 189.8MB. Free memory was 143.0MB in the beginning and 142.1MB in the end (delta: 908.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 158.80ms. Allocated memory is still 189.8MB. Free memory was 142.1MB in the beginning and 133.1MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 671654.90ms. Allocated memory was 189.8MB in the beginning and 746.6MB in the end (delta: 556.8MB). Free memory was 132.5MB in the beginning and 428.4MB in the end (delta: -295.9MB). Peak memory consumption was 261.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...