/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 07:14:47,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 07:14:47,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 07:14:47,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 07:14:47,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 07:14:47,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 07:14:47,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 07:14:47,299 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 [2022-01-18 07:14:47,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 07:14:47,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 07:14:47,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 07:14:47,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 07:14:47,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 07:14:47,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 07:14:47,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 07:14:47,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 07:14:47,337 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 07:14:47,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 07:14:47,338 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 07:14:47,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 07:14:47,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 07:14:47,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 07:14:47,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:14:47,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 07:14:47,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 07:14:47,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 07:14:47,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 07:14:47,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 07:14:47,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 07:14:47,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 07:14:47,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 07:14:47,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 07:14:47,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 07:14:47,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 07:14:47,597 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 07:14:47,597 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 07:14:47,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-01-18 07:14:47,598 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-01-18 07:14:47,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 07:14:47,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 07:14:47,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 07:14:47,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 07:14:47,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 07:14:47,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,650 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 07:14:47,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 07:14:47,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 07:14:47,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 07:14:47,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 07:14:47,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 07:14:47,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 07:14:47,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 07:14:47,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 07:14:47,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/1) ... [2022-01-18 07:14:47,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:14:47,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:47,713 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) [2022-01-18 07:14:47,724 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 [2022-01-18 07:14:47,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 07:14:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 07:14:47,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 07:14:47,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 07:14:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 07:14:47,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 07:14:47,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 07:14:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 07:14:47,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 07:14:47,749 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 07:14:47,784 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 07:14:47,785 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 07:14:47,852 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 07:14:47,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 07:14:47,870 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 07:14:47,871 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:14:47 BoogieIcfgContainer [2022-01-18 07:14:47,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 07:14:47,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 07:14:47,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 07:14:47,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 07:14:47,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:14:47" (1/2) ... [2022-01-18 07:14:47,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31eac803 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 07:14:47, skipping insertion in model container [2022-01-18 07:14:47,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:14:47" (2/2) ... [2022-01-18 07:14:47,883 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-01-18 07:14:47,889 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 07:14:47,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 07:14:47,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 07:14:47,889 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 07:14:47,919 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 07:14:47,969 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 07:14:47,977 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 07:14:47,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 07:14:47,989 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-01-18 07:14:48,012 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2022-01-18 07:14:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2022-01-18 07:14:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 07:14:48,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:48,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:48,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2022-01-18 07:14:48,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652120681] [2022-01-18 07:14:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:48,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:48,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652120681] [2022-01-18 07:14:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652120681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:14:48,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:14:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:14:48,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517342982] [2022-01-18 07:14:48,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:14:48,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 07:14:48,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 07:14:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 07:14:48,260 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-01-18 07:14:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:48,343 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-01-18 07:14:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 07:14:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2022-01-18 07:14:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:48,354 INFO L225 Difference]: With dead ends: 43 [2022-01-18 07:14:48,354 INFO L226 Difference]: Without dead ends: 43 [2022-01-18 07:14:48,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:14:48,359 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:48,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:14:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-18 07:14:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-18 07:14:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2022-01-18 07:14:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-01-18 07:14:48,390 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-01-18 07:14:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:48,390 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-01-18 07:14:48,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-01-18 07:14:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-01-18 07:14:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 07:14:48,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:48,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:48,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 07:14:48,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2022-01-18 07:14:48,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:48,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655843393] [2022-01-18 07:14:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:48,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:14:48,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655843393] [2022-01-18 07:14:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655843393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:14:48,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:14:48,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:14:48,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814160155] [2022-01-18 07:14:48,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:14:48,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:14:48,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:14:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:14:48,492 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:48,538 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-01-18 07:14:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 07:14:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 07:14:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:48,541 INFO L225 Difference]: With dead ends: 50 [2022-01-18 07:14:48,541 INFO L226 Difference]: Without dead ends: 50 [2022-01-18 07:14:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:14:48,543 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:48,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:14:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-18 07:14:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-01-18 07:14:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 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) [2022-01-18 07:14:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-01-18 07:14:48,551 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-01-18 07:14:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:48,552 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-01-18 07:14:48,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-01-18 07:14:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 07:14:48,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:48,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:48,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 07:14:48,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2022-01-18 07:14:48,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:48,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671050763] [2022-01-18 07:14:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:48,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:48,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:48,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671050763] [2022-01-18 07:14:48,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671050763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664445442] [2022-01-18 07:14:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:48,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:48,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:48,744 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) [2022-01-18 07:14:48,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 07:14:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 07:14:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:49,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:49,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664445442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:49,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:49,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 07:14:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718241512] [2022-01-18 07:14:49,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:49,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:14:49,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:14:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:14:49,624 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2022-01-18 07:14:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:49,813 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-01-18 07:14:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 07:14:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 07:14:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:49,818 INFO L225 Difference]: With dead ends: 144 [2022-01-18 07:14:49,819 INFO L226 Difference]: Without dead ends: 113 [2022-01-18 07:14:49,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:14:49,822 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 113 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:14:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-18 07:14:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2022-01-18 07:14:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-01-18 07:14:49,844 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-01-18 07:14:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-01-18 07:14:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2022-01-18 07:14:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-01-18 07:14:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 07:14:49,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:49,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:49,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 07:14:50,068 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 [2022-01-18 07:14:50,069 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2022-01-18 07:14:50,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:50,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629783054] [2022-01-18 07:14:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:50,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:50,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629783054] [2022-01-18 07:14:50,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629783054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344691598] [2022-01-18 07:14:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:14:50,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:50,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:50,166 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) [2022-01-18 07:14:50,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 07:14:50,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:14:50,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:50,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:14:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:50,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:50,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344691598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:50,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:50,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-18 07:14:50,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038496358] [2022-01-18 07:14:50,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:50,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:14:50,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:14:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:14:50,462 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:50,862 INFO L93 Difference]: Finished difference Result 177 states and 328 transitions. [2022-01-18 07:14:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 07:14:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 07:14:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:50,864 INFO L225 Difference]: With dead ends: 177 [2022-01-18 07:14:50,864 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 07:14:50,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 07:14:50,865 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 81 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:14:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 07:14:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-01-18 07:14:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2022-01-18 07:14:50,873 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2022-01-18 07:14:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:50,873 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2022-01-18 07:14:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2022-01-18 07:14:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 07:14:50,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:50,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:50,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 07:14:51,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 07:14:51,093 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2022-01-18 07:14:51,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:51,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503221383] [2022-01-18 07:14:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:51,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:51,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503221383] [2022-01-18 07:14:51,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503221383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822680352] [2022-01-18 07:14:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:14:51,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:51,156 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) [2022-01-18 07:14:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 07:14:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:14:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 07:14:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:51,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822680352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:51,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-18 07:14:51,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269694079] [2022-01-18 07:14:51,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:51,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:14:51,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:14:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:14:51,447 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-01-18 07:14:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:51,749 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2022-01-18 07:14:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 07:14:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21 [2022-01-18 07:14:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:51,750 INFO L225 Difference]: With dead ends: 141 [2022-01-18 07:14:51,750 INFO L226 Difference]: Without dead ends: 139 [2022-01-18 07:14:51,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:14:51,751 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:51,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:14:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-18 07:14:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-01-18 07:14:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-01-18 07:14:51,757 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2022-01-18 07:14:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:51,758 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-01-18 07:14:51,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-01-18 07:14:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-01-18 07:14:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:14:51,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:51,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:51,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 07:14:51,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:51,980 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:51,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2022-01-18 07:14:51,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:51,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573932768] [2022-01-18 07:14:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:51,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:52,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573932768] [2022-01-18 07:14:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573932768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027496646] [2022-01-18 07:14:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:14:52,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:52,200 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) [2022-01-18 07:14:52,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 07:14:52,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:14:52,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:14:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:53,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027496646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:53,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:53,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-01-18 07:14:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396983260] [2022-01-18 07:14:53,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:53,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:14:53,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:14:53,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:14:53,076 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:14:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:54,040 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2022-01-18 07:14:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 07:14:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 23 [2022-01-18 07:14:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:54,043 INFO L225 Difference]: With dead ends: 375 [2022-01-18 07:14:54,043 INFO L226 Difference]: Without dead ends: 361 [2022-01-18 07:14:54,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 07:14:54,044 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:54,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 230 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 501 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-01-18 07:14:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-18 07:14:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 164. [2022-01-18 07:14:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2022-01-18 07:14:54,054 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 23 [2022-01-18 07:14:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:54,055 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2022-01-18 07:14:54,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:14:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2022-01-18 07:14:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:14:54,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:54,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:54,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 07:14:54,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:54,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2022-01-18 07:14:54,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811210241] [2022-01-18 07:14:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:54,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:54,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811210241] [2022-01-18 07:14:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811210241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188985387] [2022-01-18 07:14:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:14:54,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:54,490 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) [2022-01-18 07:14:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 07:14:54,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:14:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:54,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:14:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:55,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:55,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188985387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:55,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:55,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-01-18 07:14:55,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466546987] [2022-01-18 07:14:55,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:55,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:14:55,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:14:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:14:55,741 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:14:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:14:57,727 INFO L93 Difference]: Finished difference Result 646 states and 1281 transitions. [2022-01-18 07:14:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 07:14:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 23 [2022-01-18 07:14:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:14:57,730 INFO L225 Difference]: With dead ends: 646 [2022-01-18 07:14:57,730 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 07:14:57,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 07:14:57,735 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:14:57,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 236 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-01-18 07:14:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 07:14:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 206. [2022-01-18 07:14:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.229268292682927) internal successors, (457), 205 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:14:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 457 transitions. [2022-01-18 07:14:57,755 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 457 transitions. Word has length 23 [2022-01-18 07:14:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:14:57,755 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 457 transitions. [2022-01-18 07:14:57,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:14:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 457 transitions. [2022-01-18 07:14:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:14:57,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:14:57,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:14:57,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 07:14:57,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:57,958 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:14:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:14:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 6 times [2022-01-18 07:14:57,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:14:57,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982831355] [2022-01-18 07:14:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:14:57,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:14:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:14:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:58,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:14:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982831355] [2022-01-18 07:14:58,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982831355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:14:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752332780] [2022-01-18 07:14:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:14:58,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:14:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:14:58,133 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) [2022-01-18 07:14:58,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 07:14:58,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:14:58,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:14:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:14:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:14:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:58,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:14:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:14:59,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752332780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:14:59,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:14:59,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-01-18 07:14:59,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2803957] [2022-01-18 07:14:59,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:14:59,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:14:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:14:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:14:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:14:59,307 INFO L87 Difference]: Start difference. First operand 206 states and 457 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:15:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:02,578 INFO L93 Difference]: Finished difference Result 782 states and 1564 transitions. [2022-01-18 07:15:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 07:15:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 23 [2022-01-18 07:15:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:02,582 INFO L225 Difference]: With dead ends: 782 [2022-01-18 07:15:02,582 INFO L226 Difference]: Without dead ends: 715 [2022-01-18 07:15:02,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1765, Invalid=6607, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 07:15:02,585 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 497 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:02,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 225 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 771 Invalid, 0 Unknown, 198 Unchecked, 0.5s Time] [2022-01-18 07:15:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-18 07:15:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 213. [2022-01-18 07:15:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2216981132075473) internal successors, (471), 212 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 471 transitions. [2022-01-18 07:15:02,596 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 471 transitions. Word has length 23 [2022-01-18 07:15:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:02,596 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 471 transitions. [2022-01-18 07:15:02,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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) [2022-01-18 07:15:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 471 transitions. [2022-01-18 07:15:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:15:02,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:02,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:02,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 07:15:02,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:02,816 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:02,816 INFO L85 PathProgramCache]: Analyzing trace with hash 7492009, now seen corresponding path program 7 times [2022-01-18 07:15:02,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:02,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830915724] [2022-01-18 07:15:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:02,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:02,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830915724] [2022-01-18 07:15:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830915724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:02,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925475299] [2022-01-18 07:15:02,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:15:02,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:02,916 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) [2022-01-18 07:15:02,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 07:15:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 07:15:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:03,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:03,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925475299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:03,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:03,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-18 07:15:03,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758074933] [2022-01-18 07:15:03,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:03,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:15:03,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:15:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:15:03,456 INFO L87 Difference]: Start difference. First operand 213 states and 471 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:04,517 INFO L93 Difference]: Finished difference Result 713 states and 1422 transitions. [2022-01-18 07:15:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 07:15:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:15:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:04,520 INFO L225 Difference]: With dead ends: 713 [2022-01-18 07:15:04,520 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 07:15:04,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=979, Invalid=2561, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 07:15:04,522 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 431 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:04,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 142 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:15:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 07:15:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 301. [2022-01-18 07:15:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3066666666666666) internal successors, (692), 300 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 692 transitions. [2022-01-18 07:15:04,536 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 692 transitions. Word has length 23 [2022-01-18 07:15:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:04,536 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 692 transitions. [2022-01-18 07:15:04,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 692 transitions. [2022-01-18 07:15:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:15:04,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:04,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:04,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:04,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:04,739 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2022-01-18 07:15:04,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:04,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857090643] [2022-01-18 07:15:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:04,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857090643] [2022-01-18 07:15:04,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857090643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:04,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719028512] [2022-01-18 07:15:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:15:04,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:04,826 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) [2022-01-18 07:15:04,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 07:15:04,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:15:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 07:15:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:05,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:05,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719028512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:05,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:05,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 07:15:05,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249957780] [2022-01-18 07:15:05,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 07:15:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 07:15:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 07:15:05,207 INFO L87 Difference]: Start difference. First operand 301 states and 692 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:05,575 INFO L93 Difference]: Finished difference Result 524 states and 1132 transitions. [2022-01-18 07:15:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 07:15:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:15:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:05,578 INFO L225 Difference]: With dead ends: 524 [2022-01-18 07:15:05,578 INFO L226 Difference]: Without dead ends: 520 [2022-01-18 07:15:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 07:15:05,579 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:05,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:15:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-18 07:15:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2022-01-18 07:15:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.324561403508772) internal successors, (795), 342 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 795 transitions. [2022-01-18 07:15:05,593 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 795 transitions. Word has length 23 [2022-01-18 07:15:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:05,593 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 795 transitions. [2022-01-18 07:15:05,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 795 transitions. [2022-01-18 07:15:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:15:05,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:05,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:05,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:05,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 07:15:05,808 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1482502569, now seen corresponding path program 9 times [2022-01-18 07:15:05,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707007559] [2022-01-18 07:15:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:05,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:05,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707007559] [2022-01-18 07:15:05,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707007559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:05,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097116889] [2022-01-18 07:15:05,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:15:05,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:05,899 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) [2022-01-18 07:15:05,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 07:15:05,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:15:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:05,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 07:15:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:06,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:06,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097116889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:06,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:06,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-01-18 07:15:06,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017856819] [2022-01-18 07:15:06,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:06,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 07:15:06,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 07:15:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-01-18 07:15:06,236 INFO L87 Difference]: Start difference. First operand 343 states and 795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:06,897 INFO L93 Difference]: Finished difference Result 809 states and 1674 transitions. [2022-01-18 07:15:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:15:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:15:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:06,902 INFO L225 Difference]: With dead ends: 809 [2022-01-18 07:15:06,902 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 07:15:06,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 07:15:06,903 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:06,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 139 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:15:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 07:15:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 335. [2022-01-18 07:15:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.338323353293413) internal successors, (781), 334 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 781 transitions. [2022-01-18 07:15:06,915 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 781 transitions. Word has length 25 [2022-01-18 07:15:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:06,915 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 781 transitions. [2022-01-18 07:15:06,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 781 transitions. [2022-01-18 07:15:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:15:06,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:06,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:06,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:07,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:07,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:07,142 INFO L85 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2022-01-18 07:15:07,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:07,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824133774] [2022-01-18 07:15:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:07,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:07,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824133774] [2022-01-18 07:15:07,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824133774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996482963] [2022-01-18 07:15:07,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:15:07,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:07,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:07,201 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) [2022-01-18 07:15:07,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 07:15:07,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:15:07,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 07:15:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:07,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:07,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996482963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:07,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:07,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-01-18 07:15:07,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734759418] [2022-01-18 07:15:07,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:07,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 07:15:07,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 07:15:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-01-18 07:15:07,561 INFO L87 Difference]: Start difference. First operand 335 states and 781 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:08,172 INFO L93 Difference]: Finished difference Result 532 states and 1139 transitions. [2022-01-18 07:15:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:15:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:15:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:08,175 INFO L225 Difference]: With dead ends: 532 [2022-01-18 07:15:08,175 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 07:15:08,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=847, Invalid=2015, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 07:15:08,176 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:08,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:15:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 07:15:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 330. [2022-01-18 07:15:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3221884498480243) internal successors, (764), 329 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 764 transitions. [2022-01-18 07:15:08,186 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 764 transitions. Word has length 25 [2022-01-18 07:15:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 764 transitions. [2022-01-18 07:15:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 764 transitions. [2022-01-18 07:15:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:08,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:08,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:08,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:08,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 07:15:08,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:08,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2022-01-18 07:15:08,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:08,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482562547] [2022-01-18 07:15:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:08,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:08,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:08,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482562547] [2022-01-18 07:15:08,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482562547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:08,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216222860] [2022-01-18 07:15:08,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:15:08,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:08,596 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) [2022-01-18 07:15:08,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 07:15:08,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:15:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 07:15:08,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:08,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216222860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:09,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:09,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-01-18 07:15:09,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570893810] [2022-01-18 07:15:09,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:09,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:15:09,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:15:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:15:09,472 INFO L87 Difference]: Start difference. First operand 330 states and 764 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:11,319 INFO L93 Difference]: Finished difference Result 1062 states and 2277 transitions. [2022-01-18 07:15:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 07:15:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 07:15:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:11,323 INFO L225 Difference]: With dead ends: 1062 [2022-01-18 07:15:11,323 INFO L226 Difference]: Without dead ends: 940 [2022-01-18 07:15:11,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=839, Invalid=3717, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 07:15:11,325 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 536 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:11,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 278 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:15:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-18 07:15:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 434. [2022-01-18 07:15:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.33256351039261) internal successors, (1010), 433 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1010 transitions. [2022-01-18 07:15:11,340 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1010 transitions. Word has length 27 [2022-01-18 07:15:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:11,340 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1010 transitions. [2022-01-18 07:15:11,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1010 transitions. [2022-01-18 07:15:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:11,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:11,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:11,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:11,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 07:15:11,564 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:11,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 12 times [2022-01-18 07:15:11,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:11,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681991700] [2022-01-18 07:15:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:11,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:11,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681991700] [2022-01-18 07:15:11,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681991700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932797089] [2022-01-18 07:15:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:15:11,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:11,772 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) [2022-01-18 07:15:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 07:15:11,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:15:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:15:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:12,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:13,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932797089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:13,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:13,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-01-18 07:15:13,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517414049] [2022-01-18 07:15:13,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:13,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 07:15:13,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 07:15:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 07:15:13,163 INFO L87 Difference]: Start difference. First operand 434 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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) [2022-01-18 07:15:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:29,456 INFO L93 Difference]: Finished difference Result 2209 states and 4746 transitions. [2022-01-18 07:15:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-18 07:15:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 27 [2022-01-18 07:15:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:29,463 INFO L225 Difference]: With dead ends: 2209 [2022-01-18 07:15:29,463 INFO L226 Difference]: Without dead ends: 2042 [2022-01-18 07:15:29,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15488 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=6410, Invalid=29880, Unknown=0, NotChecked=0, Total=36290 [2022-01-18 07:15:29,470 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 668 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:29,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 450 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1404 Invalid, 0 Unknown, 528 Unchecked, 0.8s Time] [2022-01-18 07:15:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-01-18 07:15:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 613. [2022-01-18 07:15:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.3562091503267975) internal successors, (1442), 612 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1442 transitions. [2022-01-18 07:15:29,495 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1442 transitions. Word has length 27 [2022-01-18 07:15:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1442 transitions. [2022-01-18 07:15:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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) [2022-01-18 07:15:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1442 transitions. [2022-01-18 07:15:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:29,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:29,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:29,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 07:15:29,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 07:15:29,711 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:29,712 INFO L85 PathProgramCache]: Analyzing trace with hash 866515745, now seen corresponding path program 13 times [2022-01-18 07:15:29,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:29,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492008798] [2022-01-18 07:15:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:29,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:29,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492008798] [2022-01-18 07:15:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492008798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949032378] [2022-01-18 07:15:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:15:29,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:29,919 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) [2022-01-18 07:15:29,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 07:15:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:15:29,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:30,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:31,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949032378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:31,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:31,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-01-18 07:15:31,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50344106] [2022-01-18 07:15:31,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:31,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 07:15:31,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 07:15:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 07:15:31,268 INFO L87 Difference]: Start difference. First operand 613 states and 1442 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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) [2022-01-18 07:15:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:42,220 INFO L93 Difference]: Finished difference Result 2366 states and 5234 transitions. [2022-01-18 07:15:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 07:15:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 27 [2022-01-18 07:15:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:42,226 INFO L225 Difference]: With dead ends: 2366 [2022-01-18 07:15:42,226 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 07:15:42,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10932 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4841, Invalid=19339, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 07:15:42,229 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:42,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 252 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1014 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-01-18 07:15:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 07:15:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 748. [2022-01-18 07:15:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.3842034805890227) internal successors, (1781), 747 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1781 transitions. [2022-01-18 07:15:42,258 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1781 transitions. Word has length 27 [2022-01-18 07:15:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1781 transitions. [2022-01-18 07:15:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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) [2022-01-18 07:15:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1781 transitions. [2022-01-18 07:15:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:42,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:42,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:42,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 07:15:42,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 597124453, now seen corresponding path program 14 times [2022-01-18 07:15:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912735516] [2022-01-18 07:15:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:42,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:42,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912735516] [2022-01-18 07:15:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912735516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:42,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685749591] [2022-01-18 07:15:42,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:15:42,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:42,623 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) [2022-01-18 07:15:42,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 07:15:42,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:15:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:15:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:42,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685749591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:43,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-18 07:15:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582786854] [2022-01-18 07:15:43,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:43,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 07:15:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 07:15:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-01-18 07:15:43,307 INFO L87 Difference]: Start difference. First operand 748 states and 1781 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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) [2022-01-18 07:15:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:45,885 INFO L93 Difference]: Finished difference Result 2069 states and 4597 transitions. [2022-01-18 07:15:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 07:15:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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 27 [2022-01-18 07:15:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:45,891 INFO L225 Difference]: With dead ends: 2069 [2022-01-18 07:15:45,891 INFO L226 Difference]: Without dead ends: 2060 [2022-01-18 07:15:45,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2367, Invalid=7533, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 07:15:45,892 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 538 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:45,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 235 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:15:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-01-18 07:15:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1128. [2022-01-18 07:15:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.3895297249334515) internal successors, (2693), 1127 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2693 transitions. [2022-01-18 07:15:45,924 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2693 transitions. Word has length 27 [2022-01-18 07:15:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:45,925 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2693 transitions. [2022-01-18 07:15:45,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 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) [2022-01-18 07:15:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2693 transitions. [2022-01-18 07:15:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:45,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:45,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:45,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:46,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:46,149 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2022-01-18 07:15:46,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300652030] [2022-01-18 07:15:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:46,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:46,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300652030] [2022-01-18 07:15:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300652030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153599466] [2022-01-18 07:15:46,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:15:46,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:46,373 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) [2022-01-18 07:15:46,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 07:15:46,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 07:15:46,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:46,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:15:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:46,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:47,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153599466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:47,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:47,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-01-18 07:15:47,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964480391] [2022-01-18 07:15:47,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 07:15:47,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 07:15:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 07:15:47,715 INFO L87 Difference]: Start difference. First operand 1128 states and 2693 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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) [2022-01-18 07:15:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:54,171 INFO L93 Difference]: Finished difference Result 3134 states and 6922 transitions. [2022-01-18 07:15:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 07:15:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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 27 [2022-01-18 07:15:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:54,181 INFO L225 Difference]: With dead ends: 3134 [2022-01-18 07:15:54,181 INFO L226 Difference]: Without dead ends: 2988 [2022-01-18 07:15:54,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10101 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3863, Invalid=21577, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 07:15:54,185 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 896 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:54,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 481 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1740 Invalid, 0 Unknown, 352 Unchecked, 0.9s Time] [2022-01-18 07:15:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-01-18 07:15:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1372. [2022-01-18 07:15:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.4033552151714077) internal successors, (3295), 1371 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3295 transitions. [2022-01-18 07:15:54,230 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3295 transitions. Word has length 27 [2022-01-18 07:15:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:54,231 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3295 transitions. [2022-01-18 07:15:54,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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) [2022-01-18 07:15:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3295 transitions. [2022-01-18 07:15:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:15:54,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:54,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:54,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:54,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 07:15:54,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2022-01-18 07:15:54,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190328965] [2022-01-18 07:15:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:54,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:54,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:54,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190328965] [2022-01-18 07:15:54,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190328965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:54,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93608163] [2022-01-18 07:15:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:15:54,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:54,548 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) [2022-01-18 07:15:54,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 07:15:54,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:15:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 07:15:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:54,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:55,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93608163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:55,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:55,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-01-18 07:15:55,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342232586] [2022-01-18 07:15:55,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:55,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:15:55,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:55,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:15:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:15:55,379 INFO L87 Difference]: Start difference. First operand 1372 states and 3295 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:56,515 INFO L93 Difference]: Finished difference Result 2372 states and 5544 transitions. [2022-01-18 07:15:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 07:15:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 07:15:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:56,522 INFO L225 Difference]: With dead ends: 2372 [2022-01-18 07:15:56,523 INFO L226 Difference]: Without dead ends: 2358 [2022-01-18 07:15:56,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=3852, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 07:15:56,524 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:56,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 117 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:15:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-01-18 07:15:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1471. [2022-01-18 07:15:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.4224489795918367) internal successors, (3561), 1470 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3561 transitions. [2022-01-18 07:15:56,560 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3561 transitions. Word has length 27 [2022-01-18 07:15:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:56,560 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3561 transitions. [2022-01-18 07:15:56,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3561 transitions. [2022-01-18 07:15:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:15:56,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:56,564 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:56,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:56,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 07:15:56,779 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 17 times [2022-01-18 07:15:56,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:56,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245597510] [2022-01-18 07:15:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:56,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:56,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245597510] [2022-01-18 07:15:56,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245597510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357059070] [2022-01-18 07:15:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:15:56,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:56,882 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) [2022-01-18 07:15:56,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 07:15:56,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 07:15:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 07:15:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:57,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:57,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357059070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:57,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:57,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-01-18 07:15:57,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918215909] [2022-01-18 07:15:57,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:57,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 07:15:57,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 07:15:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-18 07:15:57,549 INFO L87 Difference]: Start difference. First operand 1471 states and 3561 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:15:58,592 INFO L93 Difference]: Finished difference Result 2313 states and 5246 transitions. [2022-01-18 07:15:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:15:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 07:15:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:15:58,600 INFO L225 Difference]: With dead ends: 2313 [2022-01-18 07:15:58,600 INFO L226 Difference]: Without dead ends: 2265 [2022-01-18 07:15:58,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1458, Invalid=4704, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 07:15:58,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 487 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:15:58,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 132 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:15:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-01-18 07:15:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1356. [2022-01-18 07:15:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.429520295202952) internal successors, (3292), 1355 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3292 transitions. [2022-01-18 07:15:58,630 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3292 transitions. Word has length 29 [2022-01-18 07:15:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:15:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3292 transitions. [2022-01-18 07:15:58,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:15:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3292 transitions. [2022-01-18 07:15:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:15:58,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:15:58,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:15:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 07:15:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:58,856 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:15:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:15:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 18 times [2022-01-18 07:15:58,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:15:58,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223124258] [2022-01-18 07:15:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:15:58,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:15:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:15:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:58,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:15:58,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223124258] [2022-01-18 07:15:58,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223124258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:15:58,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806777130] [2022-01-18 07:15:58,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:15:58,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:15:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:15:58,941 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) [2022-01-18 07:15:58,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 07:15:58,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-18 07:15:58,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:15:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 07:15:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:15:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:59,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:15:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:15:59,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806777130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:15:59,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:15:59,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-01-18 07:15:59,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613697357] [2022-01-18 07:15:59,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:15:59,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:15:59,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:15:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:15:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:15:59,438 INFO L87 Difference]: Start difference. First operand 1356 states and 3292 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:00,434 INFO L93 Difference]: Finished difference Result 1686 states and 3919 transitions. [2022-01-18 07:16:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 07:16:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 07:16:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:00,438 INFO L225 Difference]: With dead ends: 1686 [2022-01-18 07:16:00,438 INFO L226 Difference]: Without dead ends: 1682 [2022-01-18 07:16:00,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1559, Invalid=3991, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 07:16:00,439 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:00,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 100 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:16:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-01-18 07:16:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1318. [2022-01-18 07:16:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4229309035687168) internal successors, (3191), 1317 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3191 transitions. [2022-01-18 07:16:00,465 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3191 transitions. Word has length 29 [2022-01-18 07:16:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:00,466 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3191 transitions. [2022-01-18 07:16:00,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3191 transitions. [2022-01-18 07:16:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:16:00,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:00,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:00,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 07:16:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:00,690 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:16:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -634106839, now seen corresponding path program 19 times [2022-01-18 07:16:00,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60243625] [2022-01-18 07:16:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:00,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:16:00,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:00,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60243625] [2022-01-18 07:16:00,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60243625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:00,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438708135] [2022-01-18 07:16:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:16:00,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:00,812 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) [2022-01-18 07:16:00,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 07:16:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:16:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:16:01,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:01,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438708135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:01,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:01,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 28 [2022-01-18 07:16:01,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066080585] [2022-01-18 07:16:01,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:01,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 07:16:01,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 07:16:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-01-18 07:16:01,934 INFO L87 Difference]: Start difference. First operand 1318 states and 3191 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-01-18 07:16:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:04,763 INFO L93 Difference]: Finished difference Result 2767 states and 6117 transitions. [2022-01-18 07:16:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 07:16:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 29 [2022-01-18 07:16:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:04,769 INFO L225 Difference]: With dead ends: 2767 [2022-01-18 07:16:04,769 INFO L226 Difference]: Without dead ends: 2752 [2022-01-18 07:16:04,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 07:16:04,770 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:04,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:16:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-01-18 07:16:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1421. [2022-01-18 07:16:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.37887323943662) internal successors, (3378), 1420 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3378 transitions. [2022-01-18 07:16:04,805 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3378 transitions. Word has length 29 [2022-01-18 07:16:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:04,805 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3378 transitions. [2022-01-18 07:16:04,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2022-01-18 07:16:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3378 transitions. [2022-01-18 07:16:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:16:04,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:04,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:04,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 07:16:05,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:05,023 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:16:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash -870593497, now seen corresponding path program 20 times [2022-01-18 07:16:05,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:05,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428326307] [2022-01-18 07:16:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:05,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:05,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:05,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428326307] [2022-01-18 07:16:05,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428326307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:05,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351341864] [2022-01-18 07:16:05,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:16:05,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:05,271 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) [2022-01-18 07:16:05,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 07:16:05,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:16:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:16:05,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:16:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:05,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351341864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:06,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 37 [2022-01-18 07:16:06,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063514043] [2022-01-18 07:16:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:06,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 07:16:06,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 07:16:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 07:16:06,953 INFO L87 Difference]: Start difference. First operand 1421 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2022-01-18 07:16:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:12,944 INFO L93 Difference]: Finished difference Result 2866 states and 6426 transitions. [2022-01-18 07:16:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 07:16:12,945 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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 29 [2022-01-18 07:16:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:12,949 INFO L225 Difference]: With dead ends: 2866 [2022-01-18 07:16:12,949 INFO L226 Difference]: Without dead ends: 2794 [2022-01-18 07:16:12,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2991, Invalid=10349, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 07:16:12,950 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 554 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:12,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 410 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:16:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-01-18 07:16:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1543. [2022-01-18 07:16:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.3605706874189365) internal successors, (3640), 1542 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3640 transitions. [2022-01-18 07:16:12,992 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3640 transitions. Word has length 29 [2022-01-18 07:16:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3640 transitions. [2022-01-18 07:16:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2022-01-18 07:16:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3640 transitions. [2022-01-18 07:16:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:16:12,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:12,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:13,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 07:16:13,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 07:16:13,211 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:16:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 21 times [2022-01-18 07:16:13,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544416613] [2022-01-18 07:16:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:13,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:13,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544416613] [2022-01-18 07:16:13,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544416613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060838517] [2022-01-18 07:16:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:16:13,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:13,443 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) [2022-01-18 07:16:13,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 07:16:13,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 07:16:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:16:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:16:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:14,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:14,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060838517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:14,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:14,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 07:16:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415760993] [2022-01-18 07:16:14,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:14,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:16:14,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:16:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:16:14,630 INFO L87 Difference]: Start difference. First operand 1543 states and 3640 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:16:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:20,613 INFO L93 Difference]: Finished difference Result 3195 states and 7142 transitions. [2022-01-18 07:16:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-18 07:16:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:16:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:20,618 INFO L225 Difference]: With dead ends: 3195 [2022-01-18 07:16:20,618 INFO L226 Difference]: Without dead ends: 3182 [2022-01-18 07:16:20,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3862, Invalid=17308, Unknown=0, NotChecked=0, Total=21170 [2022-01-18 07:16:20,621 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:20,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 307 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1322 Invalid, 0 Unknown, 541 Unchecked, 0.7s Time] [2022-01-18 07:16:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-01-18 07:16:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1828. [2022-01-18 07:16:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.3787629994526545) internal successors, (4346), 1827 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4346 transitions. [2022-01-18 07:16:20,663 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4346 transitions. Word has length 31 [2022-01-18 07:16:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4346 transitions. [2022-01-18 07:16:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:16:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4346 transitions. [2022-01-18 07:16:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:16:20,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:20,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:20,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 07:16:20,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 07:16:20,883 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:16:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 22 times [2022-01-18 07:16:20,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608425636] [2022-01-18 07:16:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:20,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:21,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608425636] [2022-01-18 07:16:21,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608425636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314389037] [2022-01-18 07:16:21,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:16:21,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:21,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:21,132 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) [2022-01-18 07:16:21,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 07:16:21,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:16:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:16:21,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:16:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:21,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:23,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314389037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:23,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:23,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-01-18 07:16:23,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461614614] [2022-01-18 07:16:23,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 07:16:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 07:16:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 07:16:23,013 INFO L87 Difference]: Start difference. First operand 1828 states and 4346 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:16:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:16:41,421 INFO L93 Difference]: Finished difference Result 4237 states and 9400 transitions. [2022-01-18 07:16:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-18 07:16:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 31 [2022-01-18 07:16:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:16:41,430 INFO L225 Difference]: With dead ends: 4237 [2022-01-18 07:16:41,430 INFO L226 Difference]: Without dead ends: 4083 [2022-01-18 07:16:41,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 42 SyntacticMatches, 23 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18335 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=5852, Invalid=33154, Unknown=0, NotChecked=0, Total=39006 [2022-01-18 07:16:41,433 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:16:41,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 693 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2366 Invalid, 0 Unknown, 208 Unchecked, 1.3s Time] [2022-01-18 07:16:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-01-18 07:16:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 2081. [2022-01-18 07:16:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.3653846153846154) internal successors, (4920), 2080 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:16:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 4920 transitions. [2022-01-18 07:16:41,485 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 4920 transitions. Word has length 31 [2022-01-18 07:16:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:16:41,486 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 4920 transitions. [2022-01-18 07:16:41,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:16:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 4920 transitions. [2022-01-18 07:16:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:16:41,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:16:41,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:16:41,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 07:16:41,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:41,712 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:16:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:16:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1093246803, now seen corresponding path program 23 times [2022-01-18 07:16:41,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:16:41,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272799735] [2022-01-18 07:16:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:16:41,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:16:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:16:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:41,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:16:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272799735] [2022-01-18 07:16:41,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272799735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:16:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395168377] [2022-01-18 07:16:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:16:41,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:16:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:16:41,984 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) [2022-01-18 07:16:41,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 07:16:42,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 07:16:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:16:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:16:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:16:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:16:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:16:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395168377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:16:44,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:16:44,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-01-18 07:16:44,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314409517] [2022-01-18 07:16:44,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:16:44,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 07:16:44,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:16:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 07:16:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 07:16:44,062 INFO L87 Difference]: Start difference. First operand 2081 states and 4920 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:17:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:02,359 INFO L93 Difference]: Finished difference Result 4464 states and 9835 transitions. [2022-01-18 07:17:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 07:17:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 31 [2022-01-18 07:17:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:02,374 INFO L225 Difference]: With dead ends: 4464 [2022-01-18 07:17:02,375 INFO L226 Difference]: Without dead ends: 4313 [2022-01-18 07:17:02,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15729 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=5838, Invalid=28944, Unknown=0, NotChecked=0, Total=34782 [2022-01-18 07:17:02,378 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 885 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 406 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2205 Invalid, 0 Unknown, 124 Unchecked, 1.2s Time] [2022-01-18 07:17:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2022-01-18 07:17:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2299. [2022-01-18 07:17:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.365100087032202) internal successors, (5435), 2298 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 5435 transitions. [2022-01-18 07:17:02,428 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 5435 transitions. Word has length 31 [2022-01-18 07:17:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 5435 transitions. [2022-01-18 07:17:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:17:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 5435 transitions. [2022-01-18 07:17:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:02,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:02,432 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:02,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:02,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:02,655 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1903086369, now seen corresponding path program 24 times [2022-01-18 07:17:02,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371483068] [2022-01-18 07:17:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:02,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:02,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371483068] [2022-01-18 07:17:02,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371483068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903130448] [2022-01-18 07:17:02,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:17:02,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:02,839 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) [2022-01-18 07:17:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 07:17:02,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 07:17:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:17:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:03,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903130448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:03,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:03,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-01-18 07:17:03,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344963704] [2022-01-18 07:17:03,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:03,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 07:17:03,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 07:17:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 07:17:03,848 INFO L87 Difference]: Start difference. First operand 2299 states and 5435 transitions. Second operand has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:17:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:10,128 INFO L93 Difference]: Finished difference Result 6164 states and 13824 transitions. [2022-01-18 07:17:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 07:17:10,129 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) 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 31 [2022-01-18 07:17:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:10,137 INFO L225 Difference]: With dead ends: 6164 [2022-01-18 07:17:10,138 INFO L226 Difference]: Without dead ends: 6119 [2022-01-18 07:17:10,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6371, Invalid=23041, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 07:17:10,140 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 720 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:10,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 280 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 07:17:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-01-18 07:17:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 3767. [2022-01-18 07:17:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.374137015400956) internal successors, (8941), 3766 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 8941 transitions. [2022-01-18 07:17:10,230 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 8941 transitions. Word has length 31 [2022-01-18 07:17:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:10,230 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 8941 transitions. [2022-01-18 07:17:10,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:17:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 8941 transitions. [2022-01-18 07:17:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:10,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:10,237 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:10,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:10,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 07:17:10,455 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -904596441, now seen corresponding path program 25 times [2022-01-18 07:17:10,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429463373] [2022-01-18 07:17:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:10,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:10,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429463373] [2022-01-18 07:17:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429463373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769893095] [2022-01-18 07:17:10,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:17:10,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:10,708 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) [2022-01-18 07:17:10,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 07:17:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:17:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:11,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769893095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:12,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:12,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 07:17:12,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216284794] [2022-01-18 07:17:12,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:17:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:17:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:17:12,034 INFO L87 Difference]: Start difference. First operand 3767 states and 8941 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:17:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:18,035 INFO L93 Difference]: Finished difference Result 6121 states and 14073 transitions. [2022-01-18 07:17:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 07:17:18,035 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:17:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:18,042 INFO L225 Difference]: With dead ends: 6121 [2022-01-18 07:17:18,043 INFO L226 Difference]: Without dead ends: 6005 [2022-01-18 07:17:18,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3648, Invalid=16374, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 07:17:18,044 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 530 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:18,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 225 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1325 Invalid, 0 Unknown, 658 Unchecked, 0.7s Time] [2022-01-18 07:17:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-01-18 07:17:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3993. [2022-01-18 07:17:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.3599699398797593) internal successors, (9421), 3992 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9421 transitions. [2022-01-18 07:17:18,124 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9421 transitions. Word has length 31 [2022-01-18 07:17:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:18,124 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 9421 transitions. [2022-01-18 07:17:18,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:17:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9421 transitions. [2022-01-18 07:17:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:18,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:18,131 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:18,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 07:17:18,353 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:18,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1973777929, now seen corresponding path program 26 times [2022-01-18 07:17:18,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:18,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887259631] [2022-01-18 07:17:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:18,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:18,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:18,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887259631] [2022-01-18 07:17:18,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887259631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:18,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779741579] [2022-01-18 07:17:18,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:17:18,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:18,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:18,636 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) [2022-01-18 07:17:18,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 07:17:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:17:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:17:18,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:20,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779741579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:20,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:20,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-01-18 07:17:20,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422563928] [2022-01-18 07:17:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 07:17:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 07:17:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 07:17:20,603 INFO L87 Difference]: Start difference. First operand 3993 states and 9421 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:17:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:44,246 INFO L93 Difference]: Finished difference Result 9171 states and 20860 transitions. [2022-01-18 07:17:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-01-18 07:17:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 31 [2022-01-18 07:17:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:44,256 INFO L225 Difference]: With dead ends: 9171 [2022-01-18 07:17:44,257 INFO L226 Difference]: Without dead ends: 9012 [2022-01-18 07:17:44,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30286 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=10481, Invalid=54799, Unknown=0, NotChecked=0, Total=65280 [2022-01-18 07:17:44,260 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1050 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:44,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 500 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2037 Invalid, 0 Unknown, 660 Unchecked, 1.2s Time] [2022-01-18 07:17:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-01-18 07:17:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4514. [2022-01-18 07:17:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.348991801462442) internal successors, (10601), 4513 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 10601 transitions. [2022-01-18 07:17:44,361 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 10601 transitions. Word has length 31 [2022-01-18 07:17:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:44,361 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 10601 transitions. [2022-01-18 07:17:44,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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) [2022-01-18 07:17:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 10601 transitions. [2022-01-18 07:17:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:44,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:44,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:44,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:44,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 07:17:44,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash 35494899, now seen corresponding path program 27 times [2022-01-18 07:17:44,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151544427] [2022-01-18 07:17:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:44,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:44,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:44,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151544427] [2022-01-18 07:17:44,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151544427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:44,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778737595] [2022-01-18 07:17:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:17:44,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:44,739 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) [2022-01-18 07:17:44,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 07:17:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 07:17:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:17:44,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778737595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:45,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:45,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-01-18 07:17:45,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626476422] [2022-01-18 07:17:45,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:45,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 07:17:45,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 07:17:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 07:17:45,721 INFO L87 Difference]: Start difference. First operand 4514 states and 10601 transitions. Second operand has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:17:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:48,463 INFO L93 Difference]: Finished difference Result 7799 states and 18028 transitions. [2022-01-18 07:17:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 07:17:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) 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 31 [2022-01-18 07:17:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:48,474 INFO L225 Difference]: With dead ends: 7799 [2022-01-18 07:17:48,474 INFO L226 Difference]: Without dead ends: 7793 [2022-01-18 07:17:48,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2444, Invalid=7258, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 07:17:48,476 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:48,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 210 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:17:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-01-18 07:17:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 5845. [2022-01-18 07:17:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.384154688569473) internal successors, (13933), 5844 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 13933 transitions. [2022-01-18 07:17:48,591 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 13933 transitions. Word has length 31 [2022-01-18 07:17:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:48,591 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 13933 transitions. [2022-01-18 07:17:48,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:17:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 13933 transitions. [2022-01-18 07:17:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:48,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:48,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:48,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:48,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 07:17:48,815 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1960214635, now seen corresponding path program 28 times [2022-01-18 07:17:48,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:48,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348955506] [2022-01-18 07:17:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:48,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:17:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348955506] [2022-01-18 07:17:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348955506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550316494] [2022-01-18 07:17:48,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:17:48,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:48,984 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) [2022-01-18 07:17:48,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 07:17:49,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:17:49,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:17:49,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:17:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550316494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:49,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:49,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-01-18 07:17:49,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486710398] [2022-01-18 07:17:49,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 07:17:49,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 07:17:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 07:17:49,928 INFO L87 Difference]: Start difference. First operand 5845 states and 13933 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-01-18 07:17:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:51,430 INFO L93 Difference]: Finished difference Result 7411 states and 17541 transitions. [2022-01-18 07:17:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 07:17:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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 [2022-01-18 07:17:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:51,440 INFO L225 Difference]: With dead ends: 7411 [2022-01-18 07:17:51,441 INFO L226 Difference]: Without dead ends: 7388 [2022-01-18 07:17:51,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1290, Invalid=3680, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 07:17:51,442 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 362 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:51,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 181 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:17:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-01-18 07:17:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6246. [2022-01-18 07:17:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 2.387990392313851) internal successors, (14913), 6245 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 14913 transitions. [2022-01-18 07:17:51,537 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 14913 transitions. Word has length 31 [2022-01-18 07:17:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 6246 states and 14913 transitions. [2022-01-18 07:17:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 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) [2022-01-18 07:17:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 14913 transitions. [2022-01-18 07:17:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:51,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:51,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:51,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:51,763 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 29 times [2022-01-18 07:17:51,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480384468] [2022-01-18 07:17:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:51,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:51,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:51,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480384468] [2022-01-18 07:17:51,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480384468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:51,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668793590] [2022-01-18 07:17:51,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:17:51,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:51,910 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) [2022-01-18 07:17:51,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 07:17:51,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 07:17:51,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 07:17:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:52,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:52,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668793590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:52,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:52,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 34 [2022-01-18 07:17:52,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832038411] [2022-01-18 07:17:52,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:52,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 07:17:52,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 07:17:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 07:17:52,937 INFO L87 Difference]: Start difference. First operand 6246 states and 14913 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-01-18 07:17:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:17:56,382 INFO L93 Difference]: Finished difference Result 9896 states and 23200 transitions. [2022-01-18 07:17:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 07:17:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 31 [2022-01-18 07:17:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:17:56,395 INFO L225 Difference]: With dead ends: 9896 [2022-01-18 07:17:56,395 INFO L226 Difference]: Without dead ends: 9869 [2022-01-18 07:17:56,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2625, Invalid=8505, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 07:17:56,396 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 442 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:17:56,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 262 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:17:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-01-18 07:17:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 7467. [2022-01-18 07:17:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 2.40208947227431) internal successors, (17934), 7466 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:17:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 17934 transitions. [2022-01-18 07:17:56,521 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 17934 transitions. Word has length 31 [2022-01-18 07:17:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:17:56,521 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 17934 transitions. [2022-01-18 07:17:56,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-01-18 07:17:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 17934 transitions. [2022-01-18 07:17:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:17:56,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:17:56,533 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:17:56,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 07:17:56,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:56,747 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:17:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:17:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash -352748575, now seen corresponding path program 30 times [2022-01-18 07:17:56,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:17:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573051284] [2022-01-18 07:17:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:17:56,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:17:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:17:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:17:56,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:17:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573051284] [2022-01-18 07:17:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573051284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:17:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203198921] [2022-01-18 07:17:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:17:56,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:17:56,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:17:56,977 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) [2022-01-18 07:17:56,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 07:17:56,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 07:17:56,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:17:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 07:17:57,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:17:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:57,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:17:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:17:58,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203198921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:17:58,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:17:58,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-01-18 07:17:58,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271339925] [2022-01-18 07:17:58,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:17:58,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:17:58,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:17:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:17:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:17:58,531 INFO L87 Difference]: Start difference. First operand 7467 states and 17934 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:18:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:18:15,380 INFO L93 Difference]: Finished difference Result 12255 states and 28618 transitions. [2022-01-18 07:18:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-01-18 07:18:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:18:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:18:15,395 INFO L225 Difference]: With dead ends: 12255 [2022-01-18 07:18:15,395 INFO L226 Difference]: Without dead ends: 12086 [2022-01-18 07:18:15,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22716 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6944, Invalid=47112, Unknown=0, NotChecked=0, Total=54056 [2022-01-18 07:18:15,398 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 840 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:18:15,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 600 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 07:18:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-01-18 07:18:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7931. [2022-01-18 07:18:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 2.4058007566204287) internal successors, (19078), 7930 states have internal predecessors, (19078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:18:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 19078 transitions. [2022-01-18 07:18:15,538 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 19078 transitions. Word has length 31 [2022-01-18 07:18:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:18:15,538 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 19078 transitions. [2022-01-18 07:18:15,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:18:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 19078 transitions. [2022-01-18 07:18:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:18:15,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:18:15,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:18:15,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 07:18:15,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 07:18:15,748 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:18:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:18:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1441871721, now seen corresponding path program 31 times [2022-01-18 07:18:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:18:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976219640] [2022-01-18 07:18:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:18:15,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:18:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 07:18:15,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:18:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976219640] [2022-01-18 07:18:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976219640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:18:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788468256] [2022-01-18 07:18:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:18:15,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:15,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:18:15,964 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) [2022-01-18 07:18:15,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 07:18:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:18:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:18:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:16,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:18:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:17,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788468256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:18:17,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:18:17,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-01-18 07:18:17,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769914766] [2022-01-18 07:18:17,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:18:17,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 07:18:17,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:18:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 07:18:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 07:18:17,865 INFO L87 Difference]: Start difference. First operand 7931 states and 19078 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-01-18 07:18:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:18:31,303 INFO L93 Difference]: Finished difference Result 14065 states and 33184 transitions. [2022-01-18 07:18:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 07:18:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 31 [2022-01-18 07:18:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:18:31,323 INFO L225 Difference]: With dead ends: 14065 [2022-01-18 07:18:31,323 INFO L226 Difference]: Without dead ends: 13939 [2022-01-18 07:18:31,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11148 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=6150, Invalid=22920, Unknown=0, NotChecked=0, Total=29070 [2022-01-18 07:18:31,325 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 809 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:18:31,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 529 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 07:18:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2022-01-18 07:18:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 8747. [2022-01-18 07:18:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 2.4141321747084383) internal successors, (21114), 8746 states have internal predecessors, (21114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:18:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 21114 transitions. [2022-01-18 07:18:31,532 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 21114 transitions. Word has length 31 [2022-01-18 07:18:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:18:31,532 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 21114 transitions. [2022-01-18 07:18:31,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-01-18 07:18:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 21114 transitions. [2022-01-18 07:18:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:18:31,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:18:31,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:18:31,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 07:18:31,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:31,742 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:18:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:18:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 32 times [2022-01-18 07:18:31,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:18:31,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349259542] [2022-01-18 07:18:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:18:31,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:18:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:32,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:18:32,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349259542] [2022-01-18 07:18:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349259542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:18:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40697780] [2022-01-18 07:18:32,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:18:32,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:32,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:18:32,020 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) [2022-01-18 07:18:32,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 07:18:32,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:18:32,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:18:32,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:18:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:18:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:32,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:18:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:33,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40697780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:18:33,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:18:33,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 07:18:33,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483984528] [2022-01-18 07:18:33,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:18:33,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:18:33,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:18:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:18:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:18:33,626 INFO L87 Difference]: Start difference. First operand 8747 states and 21114 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:18:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:18:47,301 INFO L93 Difference]: Finished difference Result 18782 states and 44443 transitions. [2022-01-18 07:18:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-01-18 07:18:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:18:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:18:47,325 INFO L225 Difference]: With dead ends: 18782 [2022-01-18 07:18:47,325 INFO L226 Difference]: Without dead ends: 18757 [2022-01-18 07:18:47,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28310 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=8746, Invalid=56534, Unknown=0, NotChecked=0, Total=65280 [2022-01-18 07:18:47,327 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 705 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:18:47,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 478 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2092 Invalid, 0 Unknown, 692 Unchecked, 1.1s Time] [2022-01-18 07:18:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2022-01-18 07:18:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 9498. [2022-01-18 07:18:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 2.419816784247657) internal successors, (22981), 9497 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:18:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 22981 transitions. [2022-01-18 07:18:47,580 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 22981 transitions. Word has length 31 [2022-01-18 07:18:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:18:47,581 INFO L470 AbstractCegarLoop]: Abstraction has 9498 states and 22981 transitions. [2022-01-18 07:18:47,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:18:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 22981 transitions. [2022-01-18 07:18:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:18:47,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:18:47,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:18:47,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 07:18:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:47,792 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:18:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:18:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2119534507, now seen corresponding path program 33 times [2022-01-18 07:18:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:18:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940567915] [2022-01-18 07:18:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:18:47,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:18:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:47,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:18:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940567915] [2022-01-18 07:18:47,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940567915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:18:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228867973] [2022-01-18 07:18:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:18:47,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:18:47,985 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) [2022-01-18 07:18:47,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 07:18:48,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 07:18:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:18:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 07:18:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:18:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:48,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:18:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:48,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228867973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:18:48,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:18:48,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-01-18 07:18:48,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835417916] [2022-01-18 07:18:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:18:48,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 07:18:48,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:18:48,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 07:18:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 07:18:48,981 INFO L87 Difference]: Start difference. First operand 9498 states and 22981 transitions. Second operand has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:18:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:18:52,351 INFO L93 Difference]: Finished difference Result 13376 states and 31636 transitions. [2022-01-18 07:18:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 07:18:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) 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 31 [2022-01-18 07:18:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:18:52,369 INFO L225 Difference]: With dead ends: 13376 [2022-01-18 07:18:52,369 INFO L226 Difference]: Without dead ends: 13355 [2022-01-18 07:18:52,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3140, Invalid=9742, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 07:18:52,370 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 671 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:18:52,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 377 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 07:18:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-01-18 07:18:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 9888. [2022-01-18 07:18:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9887 states have (on average 2.43633053504602) internal successors, (24088), 9887 states have internal predecessors, (24088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:18:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 24088 transitions. [2022-01-18 07:18:52,518 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 24088 transitions. Word has length 31 [2022-01-18 07:18:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:18:52,519 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 24088 transitions. [2022-01-18 07:18:52,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) 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) [2022-01-18 07:18:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 24088 transitions. [2022-01-18 07:18:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:18:52,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:18:52,528 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:18:52,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 07:18:52,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 07:18:52,728 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:18:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:18:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1454095937, now seen corresponding path program 34 times [2022-01-18 07:18:52,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:18:52,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119699285] [2022-01-18 07:18:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:18:52,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:18:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:18:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:18:52,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:18:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119699285] [2022-01-18 07:18:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119699285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:18:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226242261] [2022-01-18 07:18:52,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:18:52,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:18:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:18:52,941 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) [2022-01-18 07:18:52,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 07:18:52,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:18:52,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:18:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:18:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:18:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:53,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:18:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:18:54,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226242261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:18:54,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:18:54,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-01-18 07:18:54,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545858292] [2022-01-18 07:18:54,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:18:54,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:18:54,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:18:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:18:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:18:54,866 INFO L87 Difference]: Start difference. First operand 9888 states and 24088 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:19:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:17,719 INFO L93 Difference]: Finished difference Result 17705 states and 41885 transitions. [2022-01-18 07:19:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-01-18 07:19:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:19:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:17,740 INFO L225 Difference]: With dead ends: 17705 [2022-01-18 07:19:17,740 INFO L226 Difference]: Without dead ends: 17594 [2022-01-18 07:19:17,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30848 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=10018, Invalid=56288, Unknown=0, NotChecked=0, Total=66306 [2022-01-18 07:19:17,743 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 949 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:17,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 639 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2540 Invalid, 0 Unknown, 155 Unchecked, 1.4s Time] [2022-01-18 07:19:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-01-18 07:19:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 10848. [2022-01-18 07:19:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.433576103991887) internal successors, (26397), 10847 states have internal predecessors, (26397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 26397 transitions. [2022-01-18 07:19:17,929 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 26397 transitions. Word has length 31 [2022-01-18 07:19:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 26397 transitions. [2022-01-18 07:19:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:19:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 26397 transitions. [2022-01-18 07:19:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:19:17,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:17,939 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:17,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 07:19:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 07:19:18,140 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -492324689, now seen corresponding path program 35 times [2022-01-18 07:19:18,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563175168] [2022-01-18 07:19:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:18,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563175168] [2022-01-18 07:19:18,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563175168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934846717] [2022-01-18 07:19:18,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:19:18,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:18,370 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) [2022-01-18 07:19:18,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 07:19:18,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 07:19:18,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 07:19:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:19,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:20,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934846717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:20,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:20,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 07:19:20,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014476732] [2022-01-18 07:19:20,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:20,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:19:20,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:20,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:19:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:19:20,015 INFO L87 Difference]: Start difference. First operand 10848 states and 26397 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:19:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:33,243 INFO L93 Difference]: Finished difference Result 17432 states and 41445 transitions. [2022-01-18 07:19:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-01-18 07:19:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 31 [2022-01-18 07:19:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:33,269 INFO L225 Difference]: With dead ends: 17432 [2022-01-18 07:19:33,270 INFO L226 Difference]: Without dead ends: 17272 [2022-01-18 07:19:33,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25305 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=8414, Invalid=50878, Unknown=0, NotChecked=0, Total=59292 [2022-01-18 07:19:33,273 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:33,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 432 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2293 Invalid, 0 Unknown, 540 Unchecked, 1.1s Time] [2022-01-18 07:19:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2022-01-18 07:19:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 10560. [2022-01-18 07:19:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 2.4364049625911544) internal successors, (25726), 10559 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 25726 transitions. [2022-01-18 07:19:33,509 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 25726 transitions. Word has length 31 [2022-01-18 07:19:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 25726 transitions. [2022-01-18 07:19:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-01-18 07:19:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 25726 transitions. [2022-01-18 07:19:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:19:33,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:33,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:33,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 07:19:33,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 07:19:33,720 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1685542175, now seen corresponding path program 36 times [2022-01-18 07:19:33,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:33,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269208241] [2022-01-18 07:19:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:33,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:33,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269208241] [2022-01-18 07:19:33,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269208241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008245452] [2022-01-18 07:19:33,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:19:33,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:33,812 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) [2022-01-18 07:19:33,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 07:19:33,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 07:19:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 07:19:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:34,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008245452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:34,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-01-18 07:19:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395389858] [2022-01-18 07:19:34,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:34,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 07:19:34,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 07:19:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 07:19:34,498 INFO L87 Difference]: Start difference. First operand 10560 states and 25726 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:35,672 INFO L93 Difference]: Finished difference Result 12545 states and 30331 transitions. [2022-01-18 07:19:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 07:19:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 07:19:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:35,690 INFO L225 Difference]: With dead ends: 12545 [2022-01-18 07:19:35,690 INFO L226 Difference]: Without dead ends: 12541 [2022-01-18 07:19:35,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1818, Invalid=4988, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 07:19:35,691 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:35,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 186 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:19:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-01-18 07:19:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 11369. [2022-01-18 07:19:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 2.4481878958479943) internal successors, (27831), 11368 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 27831 transitions. [2022-01-18 07:19:35,896 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 27831 transitions. Word has length 31 [2022-01-18 07:19:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:35,896 INFO L470 AbstractCegarLoop]: Abstraction has 11369 states and 27831 transitions. [2022-01-18 07:19:35,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 27831 transitions. [2022-01-18 07:19:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:19:35,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:35,907 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:35,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 07:19:36,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:36,108 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1393248479, now seen corresponding path program 37 times [2022-01-18 07:19:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441609281] [2022-01-18 07:19:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:36,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:36,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441609281] [2022-01-18 07:19:36,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441609281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175308589] [2022-01-18 07:19:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:19:36,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:36,240 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) [2022-01-18 07:19:36,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 07:19:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:19:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:36,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175308589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:37,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:37,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-01-18 07:19:37,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321930395] [2022-01-18 07:19:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 07:19:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 07:19:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 07:19:37,160 INFO L87 Difference]: Start difference. First operand 11369 states and 27831 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:39,354 INFO L93 Difference]: Finished difference Result 12972 states and 30945 transitions. [2022-01-18 07:19:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 07:19:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 07:19:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:39,373 INFO L225 Difference]: With dead ends: 12972 [2022-01-18 07:19:39,373 INFO L226 Difference]: Without dead ends: 12972 [2022-01-18 07:19:39,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2658, Invalid=8898, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 07:19:39,375 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 494 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:39,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 251 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:19:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12972 states. [2022-01-18 07:19:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12972 to 10915. [2022-01-18 07:19:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 2.455011911306579) internal successors, (26794), 10914 states have internal predecessors, (26794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 26794 transitions. [2022-01-18 07:19:39,532 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 26794 transitions. Word has length 33 [2022-01-18 07:19:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 26794 transitions. [2022-01-18 07:19:39,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 26794 transitions. [2022-01-18 07:19:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:19:39,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:39,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:39,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 07:19:39,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 07:19:39,754 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 38 times [2022-01-18 07:19:39,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:39,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222639777] [2022-01-18 07:19:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:39,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:39,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222639777] [2022-01-18 07:19:39,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222639777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764234498] [2022-01-18 07:19:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:19:39,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:39,841 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) [2022-01-18 07:19:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 07:19:39,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:19:39,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 07:19:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:40,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:40,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764234498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:40,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:40,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-01-18 07:19:40,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674560232] [2022-01-18 07:19:40,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:40,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 07:19:40,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:40,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 07:19:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-01-18 07:19:40,551 INFO L87 Difference]: Start difference. First operand 10915 states and 26794 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-01-18 07:19:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:42,199 INFO L93 Difference]: Finished difference Result 11524 states and 27953 transitions. [2022-01-18 07:19:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 07:19:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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 33 [2022-01-18 07:19:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:42,215 INFO L225 Difference]: With dead ends: 11524 [2022-01-18 07:19:42,215 INFO L226 Difference]: Without dead ends: 11520 [2022-01-18 07:19:42,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 07:19:42,216 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:42,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 102 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:19:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2022-01-18 07:19:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 10874. [2022-01-18 07:19:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10874 states, 10873 states have (on average 2.4531408075048287) internal successors, (26673), 10873 states have internal predecessors, (26673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 26673 transitions. [2022-01-18 07:19:42,375 INFO L78 Accepts]: Start accepts. Automaton has 10874 states and 26673 transitions. Word has length 33 [2022-01-18 07:19:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:42,376 INFO L470 AbstractCegarLoop]: Abstraction has 10874 states and 26673 transitions. [2022-01-18 07:19:42,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-01-18 07:19:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10874 states and 26673 transitions. [2022-01-18 07:19:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:19:42,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:42,389 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:42,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 07:19:42,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 07:19:42,610 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2068346637, now seen corresponding path program 39 times [2022-01-18 07:19:42,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:42,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051621438] [2022-01-18 07:19:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:42,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:42,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051621438] [2022-01-18 07:19:42,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051621438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093996265] [2022-01-18 07:19:42,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:19:42,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:42,859 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) [2022-01-18 07:19:42,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 07:19:42,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 07:19:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:19:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:43,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:44,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093996265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:44,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:44,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 45 [2022-01-18 07:19:44,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582937970] [2022-01-18 07:19:44,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:44,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 07:19:44,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 07:19:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 07:19:44,238 INFO L87 Difference]: Start difference. First operand 10874 states and 26673 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 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) [2022-01-18 07:19:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:19:54,759 INFO L93 Difference]: Finished difference Result 14204 states and 34076 transitions. [2022-01-18 07:19:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-01-18 07:19:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 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 33 [2022-01-18 07:19:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:19:54,780 INFO L225 Difference]: With dead ends: 14204 [2022-01-18 07:19:54,780 INFO L226 Difference]: Without dead ends: 14039 [2022-01-18 07:19:54,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23795 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=6830, Invalid=56422, Unknown=0, NotChecked=0, Total=63252 [2022-01-18 07:19:54,785 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 940 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:19:54,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 607 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 07:19:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14039 states. [2022-01-18 07:19:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14039 to 12176. [2022-01-18 07:19:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 2.4552772073921973) internal successors, (29893), 12175 states have internal predecessors, (29893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:19:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 29893 transitions. [2022-01-18 07:19:54,990 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 29893 transitions. Word has length 33 [2022-01-18 07:19:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:19:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 29893 transitions. [2022-01-18 07:19:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 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) [2022-01-18 07:19:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 29893 transitions. [2022-01-18 07:19:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:19:55,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:19:55,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:19:55,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 07:19:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:55,203 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:19:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:19:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -226544083, now seen corresponding path program 40 times [2022-01-18 07:19:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:19:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116537350] [2022-01-18 07:19:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:19:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:19:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:19:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:55,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:19:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116537350] [2022-01-18 07:19:55,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116537350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:19:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347338924] [2022-01-18 07:19:55,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:19:55,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:19:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:19:55,463 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) [2022-01-18 07:19:55,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 07:19:55,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:19:55,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:19:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 07:19:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:19:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:56,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:19:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:19:57,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347338924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:19:57,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:19:57,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 43 [2022-01-18 07:19:57,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063245919] [2022-01-18 07:19:57,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:19:57,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 07:19:57,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:19:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 07:19:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 07:19:57,836 INFO L87 Difference]: Start difference. First operand 12176 states and 29893 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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) [2022-01-18 07:20:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:20:18,740 INFO L93 Difference]: Finished difference Result 18083 states and 43491 transitions. [2022-01-18 07:20:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-18 07:20:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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 33 [2022-01-18 07:20:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:20:18,766 INFO L225 Difference]: With dead ends: 18083 [2022-01-18 07:20:18,766 INFO L226 Difference]: Without dead ends: 17990 [2022-01-18 07:20:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17201 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=7389, Invalid=36501, Unknown=0, NotChecked=0, Total=43890 [2022-01-18 07:20:18,769 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 832 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:20:18,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 451 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 07:20:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17990 states. [2022-01-18 07:20:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17990 to 13038. [2022-01-18 07:20:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13038 states, 13037 states have (on average 2.442893303674158) internal successors, (31848), 13037 states have internal predecessors, (31848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:20:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13038 states to 13038 states and 31848 transitions. [2022-01-18 07:20:19,004 INFO L78 Accepts]: Start accepts. Automaton has 13038 states and 31848 transitions. Word has length 33 [2022-01-18 07:20:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:20:19,004 INFO L470 AbstractCegarLoop]: Abstraction has 13038 states and 31848 transitions. [2022-01-18 07:20:19,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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) [2022-01-18 07:20:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 13038 states and 31848 transitions. [2022-01-18 07:20:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:20:19,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:20:19,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:20:19,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 07:20:19,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 07:20:19,218 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:20:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:20:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 225401477, now seen corresponding path program 41 times [2022-01-18 07:20:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:20:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781425306] [2022-01-18 07:20:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:20:19,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:20:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:20:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:19,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:20:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781425306] [2022-01-18 07:20:19,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781425306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:20:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764694331] [2022-01-18 07:20:19,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:20:19,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:20:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:20:19,536 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) [2022-01-18 07:20:19,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 07:20:19,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-18 07:20:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:20:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 07:20:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:20:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:20,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:20:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:22,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764694331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:20:22,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:20:22,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-01-18 07:20:22,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455645209] [2022-01-18 07:20:22,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:20:22,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 07:20:22,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:20:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 07:20:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 07:20:22,016 INFO L87 Difference]: Start difference. First operand 13038 states and 31848 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 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) [2022-01-18 07:20:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:20:41,820 INFO L93 Difference]: Finished difference Result 20183 states and 48236 transitions. [2022-01-18 07:20:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-01-18 07:20:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 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 33 [2022-01-18 07:20:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:20:41,850 INFO L225 Difference]: With dead ends: 20183 [2022-01-18 07:20:41,850 INFO L226 Difference]: Without dead ends: 20093 [2022-01-18 07:20:41,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17206 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=7462, Invalid=36848, Unknown=0, NotChecked=0, Total=44310 [2022-01-18 07:20:41,852 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 826 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:20:41,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 334 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 07:20:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20093 states. [2022-01-18 07:20:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20093 to 13555. [2022-01-18 07:20:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13555 states, 13554 states have (on average 2.4375830013280213) internal successors, (33039), 13554 states have internal predecessors, (33039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:20:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13555 states to 13555 states and 33039 transitions. [2022-01-18 07:20:42,082 INFO L78 Accepts]: Start accepts. Automaton has 13555 states and 33039 transitions. Word has length 33 [2022-01-18 07:20:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:20:42,082 INFO L470 AbstractCegarLoop]: Abstraction has 13555 states and 33039 transitions. [2022-01-18 07:20:42,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 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) [2022-01-18 07:20:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13555 states and 33039 transitions. [2022-01-18 07:20:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:20:42,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:20:42,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:20:42,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 07:20:42,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:20:42,296 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:20:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:20:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 42 times [2022-01-18 07:20:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:20:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246767807] [2022-01-18 07:20:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:20:42,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:20:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:20:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:20:42,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:20:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246767807] [2022-01-18 07:20:42,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246767807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:20:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376723541] [2022-01-18 07:20:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:20:42,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:20:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:20:42,404 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) [2022-01-18 07:20:42,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 07:20:42,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 07:20:42,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:20:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 07:20:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:20:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:20:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:20:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376723541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:20:43,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:20:43,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 15] total 33 [2022-01-18 07:20:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621249838] [2022-01-18 07:20:43,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:20:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 07:20:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:20:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 07:20:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 07:20:43,534 INFO L87 Difference]: Start difference. First operand 13555 states and 33039 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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) [2022-01-18 07:20:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:20:45,374 INFO L93 Difference]: Finished difference Result 15695 states and 38021 transitions. [2022-01-18 07:20:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 07:20:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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 33 [2022-01-18 07:20:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:20:45,397 INFO L225 Difference]: With dead ends: 15695 [2022-01-18 07:20:45,398 INFO L226 Difference]: Without dead ends: 15689 [2022-01-18 07:20:45,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2133, Invalid=6239, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 07:20:45,399 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 486 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:20:45,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 212 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 07:20:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15689 states. [2022-01-18 07:20:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15689 to 13624. [2022-01-18 07:20:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13624 states, 13623 states have (on average 2.436614548924613) internal successors, (33194), 13623 states have internal predecessors, (33194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:20:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 33194 transitions. [2022-01-18 07:20:45,606 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 33194 transitions. Word has length 33 [2022-01-18 07:20:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:20:45,607 INFO L470 AbstractCegarLoop]: Abstraction has 13624 states and 33194 transitions. [2022-01-18 07:20:45,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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) [2022-01-18 07:20:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 33194 transitions. [2022-01-18 07:20:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:20:45,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:20:45,622 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:20:45,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 07:20:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:20:45,835 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:20:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:20:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 43 times [2022-01-18 07:20:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:20:45,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435391349] [2022-01-18 07:20:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:20:45,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:20:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:20:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:46,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:20:46,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435391349] [2022-01-18 07:20:46,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435391349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:20:46,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680932091] [2022-01-18 07:20:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:20:46,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:20:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:20:46,136 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) [2022-01-18 07:20:46,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 07:20:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:20:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:20:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:20:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:46,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:20:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:20:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680932091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:20:47,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:20:47,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-01-18 07:20:47,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100202476] [2022-01-18 07:20:47,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:20:47,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:20:47,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:20:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:20:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:20:47,621 INFO L87 Difference]: Start difference. First operand 13624 states and 33194 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:21:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:21:03,279 INFO L93 Difference]: Finished difference Result 20051 states and 47451 transitions. [2022-01-18 07:21:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2022-01-18 07:21:03,280 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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 35 [2022-01-18 07:21:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:21:03,311 INFO L225 Difference]: With dead ends: 20051 [2022-01-18 07:21:03,311 INFO L226 Difference]: Without dead ends: 20042 [2022-01-18 07:21:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28656 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=9697, Invalid=55583, Unknown=0, NotChecked=0, Total=65280 [2022-01-18 07:21:03,315 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1099 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 883 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:21:03,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 591 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2431 Invalid, 0 Unknown, 883 Unchecked, 1.2s Time] [2022-01-18 07:21:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20042 states. [2022-01-18 07:21:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20042 to 13933. [2022-01-18 07:21:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13933 states, 13932 states have (on average 2.4394918173987943) internal successors, (33987), 13932 states have internal predecessors, (33987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:21:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13933 states to 13933 states and 33987 transitions. [2022-01-18 07:21:03,593 INFO L78 Accepts]: Start accepts. Automaton has 13933 states and 33987 transitions. Word has length 35 [2022-01-18 07:21:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:21:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 13933 states and 33987 transitions. [2022-01-18 07:21:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:21:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 13933 states and 33987 transitions. [2022-01-18 07:21:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:21:03,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:21:03,609 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:21:03,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 07:21:03,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 07:21:03,823 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:21:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:21:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 44 times [2022-01-18 07:21:03,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:21:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057512045] [2022-01-18 07:21:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:21:03,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:21:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:21:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:04,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:21:04,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057512045] [2022-01-18 07:21:04,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057512045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:21:04,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453949423] [2022-01-18 07:21:04,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:21:04,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:21:04,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:21:04,088 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) [2022-01-18 07:21:04,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 07:21:04,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:21:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:21:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:21:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:21:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:04,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:21:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:06,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453949423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:21:06,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:21:06,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-01-18 07:21:06,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961658203] [2022-01-18 07:21:06,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:21:06,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 07:21:06,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:21:06,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 07:21:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 07:21:06,903 INFO L87 Difference]: Start difference. First operand 13933 states and 33987 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:21:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:21:45,917 INFO L93 Difference]: Finished difference Result 20139 states and 48023 transitions. [2022-01-18 07:21:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-18 07:21:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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 35 [2022-01-18 07:21:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:21:45,942 INFO L225 Difference]: With dead ends: 20139 [2022-01-18 07:21:45,942 INFO L226 Difference]: Without dead ends: 20024 [2022-01-18 07:21:45,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 50 SyntacticMatches, 30 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 28615 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=10216, Invalid=50054, Unknown=0, NotChecked=0, Total=60270 [2022-01-18 07:21:45,945 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1470 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:21:45,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 509 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2368 Invalid, 0 Unknown, 126 Unchecked, 1.5s Time] [2022-01-18 07:21:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20024 states. [2022-01-18 07:21:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20024 to 14405. [2022-01-18 07:21:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14405 states, 14404 states have (on average 2.4391141349625105) internal successors, (35133), 14404 states have internal predecessors, (35133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:21:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14405 states to 14405 states and 35133 transitions. [2022-01-18 07:21:46,183 INFO L78 Accepts]: Start accepts. Automaton has 14405 states and 35133 transitions. Word has length 35 [2022-01-18 07:21:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:21:46,183 INFO L470 AbstractCegarLoop]: Abstraction has 14405 states and 35133 transitions. [2022-01-18 07:21:46,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:21:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 14405 states and 35133 transitions. [2022-01-18 07:21:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:21:46,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:21:46,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:21:46,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 07:21:46,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 07:21:46,401 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:21:46,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:21:46,402 INFO L85 PathProgramCache]: Analyzing trace with hash 975083881, now seen corresponding path program 45 times [2022-01-18 07:21:46,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:21:46,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385737087] [2022-01-18 07:21:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:21:46,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:21:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:21:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:46,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:21:46,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385737087] [2022-01-18 07:21:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385737087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:21:46,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21269764] [2022-01-18 07:21:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:21:46,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:21:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:21:46,683 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) [2022-01-18 07:21:46,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 07:21:46,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 07:21:46,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:21:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:21:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:21:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:47,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:21:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:21:49,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21269764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:21:49,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:21:49,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-01-18 07:21:49,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289117484] [2022-01-18 07:21:49,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:21:49,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 07:21:49,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:21:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 07:21:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 07:21:49,728 INFO L87 Difference]: Start difference. First operand 14405 states and 35133 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:22:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:22:29,535 INFO L93 Difference]: Finished difference Result 21432 states and 51087 transitions. [2022-01-18 07:22:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-01-18 07:22:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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 35 [2022-01-18 07:22:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:22:29,567 INFO L225 Difference]: With dead ends: 21432 [2022-01-18 07:22:29,568 INFO L226 Difference]: Without dead ends: 21312 [2022-01-18 07:22:29,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26038 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=10569, Invalid=51183, Unknown=0, NotChecked=0, Total=61752 [2022-01-18 07:22:29,570 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1522 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:22:29,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 507 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 07:22:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21312 states. [2022-01-18 07:22:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21312 to 14910. [2022-01-18 07:22:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 14909 states have (on average 2.43953316788517) internal successors, (36371), 14909 states have internal predecessors, (36371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:22:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 36371 transitions. [2022-01-18 07:22:29,882 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 36371 transitions. Word has length 35 [2022-01-18 07:22:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:22:29,882 INFO L470 AbstractCegarLoop]: Abstraction has 14910 states and 36371 transitions. [2022-01-18 07:22:29,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:22:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 36371 transitions. [2022-01-18 07:22:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:22:29,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:22:29,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:22:29,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 07:22:30,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 07:22:30,099 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:22:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:22:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1746633437, now seen corresponding path program 46 times [2022-01-18 07:22:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:22:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400637787] [2022-01-18 07:22:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:22:30,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:22:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:22:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:30,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:22:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400637787] [2022-01-18 07:22:30,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400637787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:22:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748131732] [2022-01-18 07:22:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:22:30,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:22:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:22:30,331 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) [2022-01-18 07:22:30,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 07:22:30,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:22:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:22:30,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 07:22:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:22:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:31,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:22:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:31,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748131732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:22:31,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:22:31,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2022-01-18 07:22:31,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674900510] [2022-01-18 07:22:31,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:22:31,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 07:22:31,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:22:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 07:22:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 07:22:31,530 INFO L87 Difference]: Start difference. First operand 14910 states and 36371 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:22:41,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:22:41,492 INFO L93 Difference]: Finished difference Result 21319 states and 50521 transitions. [2022-01-18 07:22:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-01-18 07:22:41,493 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:22:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:22:41,535 INFO L225 Difference]: With dead ends: 21319 [2022-01-18 07:22:41,535 INFO L226 Difference]: Without dead ends: 21316 [2022-01-18 07:22:41,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22071 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10620, Invalid=39780, Unknown=0, NotChecked=0, Total=50400 [2022-01-18 07:22:41,538 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 988 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:22:41,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 370 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:22:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21316 states. [2022-01-18 07:22:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21316 to 17557. [2022-01-18 07:22:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17557 states, 17556 states have (on average 2.440248348143085) internal successors, (42841), 17556 states have internal predecessors, (42841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:22:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17557 states to 17557 states and 42841 transitions. [2022-01-18 07:22:41,827 INFO L78 Accepts]: Start accepts. Automaton has 17557 states and 42841 transitions. Word has length 35 [2022-01-18 07:22:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:22:41,827 INFO L470 AbstractCegarLoop]: Abstraction has 17557 states and 42841 transitions. [2022-01-18 07:22:41,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:22:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17557 states and 42841 transitions. [2022-01-18 07:22:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:22:41,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:22:41,846 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:22:41,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 07:22:42,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:22:42,046 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:22:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:22:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 47 times [2022-01-18 07:22:42,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:22:42,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674394395] [2022-01-18 07:22:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:22:42,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:22:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:22:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:42,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:22:42,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674394395] [2022-01-18 07:22:42,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674394395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:22:42,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082984483] [2022-01-18 07:22:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:22:42,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:22:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:22:42,329 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) [2022-01-18 07:22:42,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 07:22:42,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 07:22:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:22:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:22:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:22:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:43,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:22:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:22:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082984483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:22:43,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:22:43,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-01-18 07:22:43,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176697003] [2022-01-18 07:22:43,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:22:43,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:22:43,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:22:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:22:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:22:43,985 INFO L87 Difference]: Start difference. First operand 17557 states and 42841 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:23:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:23:03,601 INFO L93 Difference]: Finished difference Result 26206 states and 62378 transitions. [2022-01-18 07:23:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-01-18 07:23:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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 35 [2022-01-18 07:23:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:23:03,649 INFO L225 Difference]: With dead ends: 26206 [2022-01-18 07:23:03,649 INFO L226 Difference]: Without dead ends: 26180 [2022-01-18 07:23:03,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 48 SyntacticMatches, 22 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42202 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=13207, Invalid=78905, Unknown=0, NotChecked=0, Total=92112 [2022-01-18 07:23:03,654 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 895 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 4444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1030 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:23:03,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 587 Invalid, 4444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 3045 Invalid, 0 Unknown, 1030 Unchecked, 1.5s Time] [2022-01-18 07:23:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26180 states. [2022-01-18 07:23:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26180 to 18303. [2022-01-18 07:23:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18303 states, 18302 states have (on average 2.4483662987651624) internal successors, (44810), 18302 states have internal predecessors, (44810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18303 states to 18303 states and 44810 transitions. [2022-01-18 07:23:04,003 INFO L78 Accepts]: Start accepts. Automaton has 18303 states and 44810 transitions. Word has length 35 [2022-01-18 07:23:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:23:04,003 INFO L470 AbstractCegarLoop]: Abstraction has 18303 states and 44810 transitions. [2022-01-18 07:23:04,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:23:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18303 states and 44810 transitions. [2022-01-18 07:23:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:23:04,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:23:04,024 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:23:04,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 07:23:04,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 07:23:04,225 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:23:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:23:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 48 times [2022-01-18 07:23:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:23:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503306079] [2022-01-18 07:23:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:23:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:23:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:23:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:04,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:23:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503306079] [2022-01-18 07:23:04,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503306079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:23:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720166392] [2022-01-18 07:23:04,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:23:04,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:23:04,519 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) [2022-01-18 07:23:04,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 07:23:04,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 07:23:04,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:23:04,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:23:04,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:23:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:05,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:23:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720166392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:23:06,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:23:06,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-01-18 07:23:06,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604079032] [2022-01-18 07:23:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:23:06,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:23:06,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:23:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:23:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:23:06,084 INFO L87 Difference]: Start difference. First operand 18303 states and 44810 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:23:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:23:21,152 INFO L93 Difference]: Finished difference Result 26371 states and 63377 transitions. [2022-01-18 07:23:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-01-18 07:23:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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 35 [2022-01-18 07:23:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:23:21,196 INFO L225 Difference]: With dead ends: 26371 [2022-01-18 07:23:21,196 INFO L226 Difference]: Without dead ends: 26334 [2022-01-18 07:23:21,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 50 SyntacticMatches, 27 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30027 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=10312, Invalid=52940, Unknown=0, NotChecked=0, Total=63252 [2022-01-18 07:23:21,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 793 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2392 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 908 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:23:21,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 408 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2392 Invalid, 0 Unknown, 908 Unchecked, 1.3s Time] [2022-01-18 07:23:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26334 states. [2022-01-18 07:23:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26334 to 19381. [2022-01-18 07:23:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19381 states, 19380 states have (on average 2.451496388028896) internal successors, (47510), 19380 states have internal predecessors, (47510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19381 states to 19381 states and 47510 transitions. [2022-01-18 07:23:21,591 INFO L78 Accepts]: Start accepts. Automaton has 19381 states and 47510 transitions. Word has length 35 [2022-01-18 07:23:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:23:21,591 INFO L470 AbstractCegarLoop]: Abstraction has 19381 states and 47510 transitions. [2022-01-18 07:23:21,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:23:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 19381 states and 47510 transitions. [2022-01-18 07:23:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:23:21,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:23:21,612 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:23:21,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 07:23:21,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 07:23:21,813 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:23:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:23:21,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1813168103, now seen corresponding path program 49 times [2022-01-18 07:23:21,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:23:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605857887] [2022-01-18 07:23:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:23:21,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:23:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:23:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:22,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:23:22,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605857887] [2022-01-18 07:23:22,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605857887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:23:22,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671706465] [2022-01-18 07:23:22,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:23:22,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:22,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:23:22,157 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) [2022-01-18 07:23:22,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 07:23:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:23:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:23:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:23:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:23:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:23,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671706465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:23:23,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:23:23,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-01-18 07:23:23,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6286375] [2022-01-18 07:23:23,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:23:23,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:23:23,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:23:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:23:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:23:23,831 INFO L87 Difference]: Start difference. First operand 19381 states and 47510 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:23:39,610 INFO L93 Difference]: Finished difference Result 26618 states and 63983 transitions. [2022-01-18 07:23:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-01-18 07:23:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:23:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:23:39,653 INFO L225 Difference]: With dead ends: 26618 [2022-01-18 07:23:39,653 INFO L226 Difference]: Without dead ends: 26481 [2022-01-18 07:23:39,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 50 SyntacticMatches, 29 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32441 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=11013, Invalid=56847, Unknown=0, NotChecked=0, Total=67860 [2022-01-18 07:23:39,656 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 924 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:23:39,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 408 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2289 Invalid, 0 Unknown, 832 Unchecked, 1.2s Time] [2022-01-18 07:23:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26481 states. [2022-01-18 07:23:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26481 to 19297. [2022-01-18 07:23:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19297 states, 19296 states have (on average 2.4449626865671643) internal successors, (47178), 19296 states have internal predecessors, (47178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19297 states to 19297 states and 47178 transitions. [2022-01-18 07:23:39,987 INFO L78 Accepts]: Start accepts. Automaton has 19297 states and 47178 transitions. Word has length 35 [2022-01-18 07:23:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:23:39,988 INFO L470 AbstractCegarLoop]: Abstraction has 19297 states and 47178 transitions. [2022-01-18 07:23:39,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:23:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19297 states and 47178 transitions. [2022-01-18 07:23:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:23:40,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:23:40,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:23:40,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 07:23:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:40,210 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:23:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:23:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash 893229107, now seen corresponding path program 50 times [2022-01-18 07:23:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:23:40,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596617702] [2022-01-18 07:23:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:23:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:23:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:23:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:40,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:23:40,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596617702] [2022-01-18 07:23:40,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596617702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:23:40,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186691572] [2022-01-18 07:23:40,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:23:40,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:23:40,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:23:40,559 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) [2022-01-18 07:23:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 07:23:40,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:23:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:23:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:23:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:23:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:23:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:23:43,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186691572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:23:43,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:23:43,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-01-18 07:23:43,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437047353] [2022-01-18 07:23:43,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:23:43,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 07:23:43,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:23:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 07:23:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 07:23:43,419 INFO L87 Difference]: Start difference. First operand 19297 states and 47178 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:24:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:24:25,350 INFO L93 Difference]: Finished difference Result 29093 states and 69906 transitions. [2022-01-18 07:24:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-01-18 07:24:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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 35 [2022-01-18 07:24:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:24:25,397 INFO L225 Difference]: With dead ends: 29093 [2022-01-18 07:24:25,398 INFO L226 Difference]: Without dead ends: 28983 [2022-01-18 07:24:25,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 53 SyntacticMatches, 28 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36856 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=11974, Invalid=66706, Unknown=0, NotChecked=0, Total=78680 [2022-01-18 07:24:25,401 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1039 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 591 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:24:25,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 478 Invalid, 3629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2584 Invalid, 0 Unknown, 591 Unchecked, 1.6s Time] [2022-01-18 07:24:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28983 states. [2022-01-18 07:24:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28983 to 19972. [2022-01-18 07:24:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19972 states, 19971 states have (on average 2.441740523759451) internal successors, (48764), 19971 states have internal predecessors, (48764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:24:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19972 states to 19972 states and 48764 transitions. [2022-01-18 07:24:25,765 INFO L78 Accepts]: Start accepts. Automaton has 19972 states and 48764 transitions. Word has length 35 [2022-01-18 07:24:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:24:25,765 INFO L470 AbstractCegarLoop]: Abstraction has 19972 states and 48764 transitions. [2022-01-18 07:24:25,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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) [2022-01-18 07:24:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19972 states and 48764 transitions. [2022-01-18 07:24:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:24:25,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:24:25,786 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:24:25,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 07:24:25,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 07:24:25,987 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:24:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:24:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2007406801, now seen corresponding path program 51 times [2022-01-18 07:24:25,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:24:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438833514] [2022-01-18 07:24:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:24:25,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:24:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:24:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:26,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:24:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438833514] [2022-01-18 07:24:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438833514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:24:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535999414] [2022-01-18 07:24:26,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:24:26,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:24:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:24:26,254 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) [2022-01-18 07:24:26,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 07:24:26,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 07:24:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:24:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:24:26,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:24:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:27,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:24:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:27,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535999414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:24:27,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:24:27,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 44 [2022-01-18 07:24:27,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852338514] [2022-01-18 07:24:27,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:24:27,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 07:24:27,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:24:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 07:24:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:24:27,795 INFO L87 Difference]: Start difference. First operand 19972 states and 48764 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:24:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:24:36,607 INFO L93 Difference]: Finished difference Result 29243 states and 70057 transitions. [2022-01-18 07:24:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-18 07:24:36,607 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have 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 [2022-01-18 07:24:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:24:36,668 INFO L225 Difference]: With dead ends: 29243 [2022-01-18 07:24:36,668 INFO L226 Difference]: Without dead ends: 29237 [2022-01-18 07:24:36,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15623 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=8302, Invalid=31100, Unknown=0, NotChecked=0, Total=39402 [2022-01-18 07:24:36,672 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 916 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:24:36,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 435 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 07:24:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29237 states. [2022-01-18 07:24:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29237 to 22851. [2022-01-18 07:24:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22851 states, 22850 states have (on average 2.44691466083151) internal successors, (55912), 22850 states have internal predecessors, (55912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:24:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 55912 transitions. [2022-01-18 07:24:37,122 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 55912 transitions. Word has length 35 [2022-01-18 07:24:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:24:37,122 INFO L470 AbstractCegarLoop]: Abstraction has 22851 states and 55912 transitions. [2022-01-18 07:24:37,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:24:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 55912 transitions. [2022-01-18 07:24:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:24:37,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:24:37,146 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:24:37,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 07:24:37,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:24:37,347 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:24:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:24:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1057414301, now seen corresponding path program 52 times [2022-01-18 07:24:37,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:24:37,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323723878] [2022-01-18 07:24:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:24:37,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:24:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:24:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:37,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:24:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323723878] [2022-01-18 07:24:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323723878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:24:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442124197] [2022-01-18 07:24:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:24:37,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:24:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:24:37,676 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) [2022-01-18 07:24:37,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 07:24:37,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:24:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:24:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:24:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:24:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:38,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:24:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:39,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442124197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:24:39,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:24:39,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-01-18 07:24:39,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43167253] [2022-01-18 07:24:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:24:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 07:24:39,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:24:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 07:24:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 07:24:39,362 INFO L87 Difference]: Start difference. First operand 22851 states and 55912 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2022-01-18 07:24:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:24:49,841 INFO L93 Difference]: Finished difference Result 31373 states and 75952 transitions. [2022-01-18 07:24:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-18 07:24:49,842 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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 35 [2022-01-18 07:24:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:24:49,894 INFO L225 Difference]: With dead ends: 31373 [2022-01-18 07:24:49,894 INFO L226 Difference]: Without dead ends: 31199 [2022-01-18 07:24:49,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14849 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=6530, Invalid=28626, Unknown=0, NotChecked=0, Total=35156 [2022-01-18 07:24:49,896 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1026 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 07:24:49,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 252 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1702 Invalid, 0 Unknown, 576 Unchecked, 0.9s Time] [2022-01-18 07:24:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31199 states. [2022-01-18 07:24:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31199 to 23603. [2022-01-18 07:24:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23603 states, 23602 states have (on average 2.44305567324803) internal successors, (57661), 23602 states have internal predecessors, (57661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:24:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23603 states to 23603 states and 57661 transitions. [2022-01-18 07:24:50,406 INFO L78 Accepts]: Start accepts. Automaton has 23603 states and 57661 transitions. Word has length 35 [2022-01-18 07:24:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:24:50,406 INFO L470 AbstractCegarLoop]: Abstraction has 23603 states and 57661 transitions. [2022-01-18 07:24:50,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2022-01-18 07:24:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 23603 states and 57661 transitions. [2022-01-18 07:24:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:24:50,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:24:50,430 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:24:50,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 07:24:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 07:24:50,630 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:24:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:24:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1158386019, now seen corresponding path program 53 times [2022-01-18 07:24:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:24:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259483357] [2022-01-18 07:24:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:24:50,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:24:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:24:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:50,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:24:50,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259483357] [2022-01-18 07:24:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259483357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:24:50,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883097784] [2022-01-18 07:24:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:24:50,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:24:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:24:50,924 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) [2022-01-18 07:24:50,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 07:24:50,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 07:24:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:24:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 07:24:50,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:24:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:51,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:24:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:24:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883097784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:24:52,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:24:52,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2022-01-18 07:24:52,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106611849] [2022-01-18 07:24:52,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:24:52,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 07:24:52,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:24:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 07:24:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1395, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 07:24:52,152 INFO L87 Difference]: Start difference. First operand 23603 states and 57661 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:25:01,595 INFO L93 Difference]: Finished difference Result 29912 states and 71625 transitions. [2022-01-18 07:25:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-01-18 07:25:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:25:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:25:01,650 INFO L225 Difference]: With dead ends: 29912 [2022-01-18 07:25:01,651 INFO L226 Difference]: Without dead ends: 29891 [2022-01-18 07:25:01,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20979 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9713, Invalid=38907, Unknown=0, NotChecked=0, Total=48620 [2022-01-18 07:25:01,654 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1049 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:25:01,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 401 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 07:25:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29891 states. [2022-01-18 07:25:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29891 to 25803. [2022-01-18 07:25:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25803 states, 25802 states have (on average 2.439074490349585) internal successors, (62933), 25802 states have internal predecessors, (62933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25803 states to 25803 states and 62933 transitions. [2022-01-18 07:25:02,171 INFO L78 Accepts]: Start accepts. Automaton has 25803 states and 62933 transitions. Word has length 35 [2022-01-18 07:25:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:25:02,172 INFO L470 AbstractCegarLoop]: Abstraction has 25803 states and 62933 transitions. [2022-01-18 07:25:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25803 states and 62933 transitions. [2022-01-18 07:25:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:25:02,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:25:02,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:25:02,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 07:25:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 07:25:02,399 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:25:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:25:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 54 times [2022-01-18 07:25:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:25:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430500364] [2022-01-18 07:25:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:25:02,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:25:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:25:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:25:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430500364] [2022-01-18 07:25:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430500364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:25:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132134722] [2022-01-18 07:25:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:25:02,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:25:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:25:02,614 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) [2022-01-18 07:25:02,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 07:25:02,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-18 07:25:02,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:25:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:25:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:25:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:03,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:25:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:04,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132134722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:25:04,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:25:04,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 18] total 44 [2022-01-18 07:25:04,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688777801] [2022-01-18 07:25:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:25:04,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 07:25:04,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:25:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 07:25:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 07:25:04,651 INFO L87 Difference]: Start difference. First operand 25803 states and 62933 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:25:13,876 INFO L93 Difference]: Finished difference Result 36293 states and 87122 transitions. [2022-01-18 07:25:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-18 07:25:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2022-01-18 07:25:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:25:13,940 INFO L225 Difference]: With dead ends: 36293 [2022-01-18 07:25:13,940 INFO L226 Difference]: Without dead ends: 36205 [2022-01-18 07:25:13,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9722 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5750, Invalid=19690, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 07:25:13,941 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 949 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:25:13,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 489 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 07:25:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36205 states. [2022-01-18 07:25:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36205 to 30216. [2022-01-18 07:25:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30216 states, 30215 states have (on average 2.442197583981466) internal successors, (73791), 30215 states have internal predecessors, (73791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30216 states to 30216 states and 73791 transitions. [2022-01-18 07:25:14,518 INFO L78 Accepts]: Start accepts. Automaton has 30216 states and 73791 transitions. Word has length 35 [2022-01-18 07:25:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:25:14,518 INFO L470 AbstractCegarLoop]: Abstraction has 30216 states and 73791 transitions. [2022-01-18 07:25:14,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 30216 states and 73791 transitions. [2022-01-18 07:25:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:25:14,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:25:14,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:25:14,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 07:25:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:25:14,746 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:25:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:25:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 55 times [2022-01-18 07:25:14,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:25:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115301556] [2022-01-18 07:25:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:25:14,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:25:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:25:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:25:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115301556] [2022-01-18 07:25:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115301556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:25:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029512014] [2022-01-18 07:25:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:25:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:25:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:25:15,108 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) [2022-01-18 07:25:15,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 07:25:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:25:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 07:25:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:25:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:15,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:25:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:16,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029512014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:25:16,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:25:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-01-18 07:25:16,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889714287] [2022-01-18 07:25:16,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:25:16,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 07:25:16,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:25:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 07:25:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 07:25:16,868 INFO L87 Difference]: Start difference. First operand 30216 states and 73791 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:25:20,722 INFO L93 Difference]: Finished difference Result 38391 states and 93613 transitions. [2022-01-18 07:25:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 07:25:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-01-18 07:25:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:25:20,797 INFO L225 Difference]: With dead ends: 38391 [2022-01-18 07:25:20,797 INFO L226 Difference]: Without dead ends: 38383 [2022-01-18 07:25:20,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3144, Invalid=8628, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 07:25:20,798 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:25:20,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 172 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 07:25:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38383 states. [2022-01-18 07:25:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38383 to 33520. [2022-01-18 07:25:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33520 states, 33519 states have (on average 2.4532653122109846) internal successors, (82231), 33519 states have internal predecessors, (82231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33520 states to 33520 states and 82231 transitions. [2022-01-18 07:25:21,521 INFO L78 Accepts]: Start accepts. Automaton has 33520 states and 82231 transitions. Word has length 35 [2022-01-18 07:25:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:25:21,521 INFO L470 AbstractCegarLoop]: Abstraction has 33520 states and 82231 transitions. [2022-01-18 07:25:21,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:25:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33520 states and 82231 transitions. [2022-01-18 07:25:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:25:21,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:25:21,550 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:25:21,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 07:25:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:25:21,750 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:25:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:25:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -968336091, now seen corresponding path program 56 times [2022-01-18 07:25:21,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:25:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148696820] [2022-01-18 07:25:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:25:21,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:25:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:25:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:22,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:25:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148696820] [2022-01-18 07:25:22,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148696820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:25:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805778206] [2022-01-18 07:25:22,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:25:22,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:25:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:25:22,010 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) [2022-01-18 07:25:22,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 07:25:22,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:25:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:25:22,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:25:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:25:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:22,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:25:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:25:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805778206] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:25:24,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:25:24,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-01-18 07:25:24,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975151856] [2022-01-18 07:25:24,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:25:24,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:25:24,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:25:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:25:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:25:24,875 INFO L87 Difference]: Start difference. First operand 33520 states and 82231 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:26:27,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:26:27,182 INFO L93 Difference]: Finished difference Result 80656 states and 197412 transitions. [2022-01-18 07:26:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 347 states. [2022-01-18 07:26:27,182 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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 35 [2022-01-18 07:26:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:26:27,361 INFO L225 Difference]: With dead ends: 80656 [2022-01-18 07:26:27,361 INFO L226 Difference]: Without dead ends: 80534 [2022-01-18 07:26:27,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66216 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=21817, Invalid=121445, Unknown=0, NotChecked=0, Total=143262 [2022-01-18 07:26:27,367 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1111 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 3082 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 4953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1364 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:27,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 672 Invalid, 4953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3082 Invalid, 0 Unknown, 1364 Unchecked, 1.8s Time] [2022-01-18 07:26:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80534 states. [2022-01-18 07:26:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80534 to 42013. [2022-01-18 07:26:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42013 states, 42012 states have (on average 2.4548938398552793) internal successors, (103135), 42012 states have internal predecessors, (103135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:26:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42013 states to 42013 states and 103135 transitions. [2022-01-18 07:26:28,654 INFO L78 Accepts]: Start accepts. Automaton has 42013 states and 103135 transitions. Word has length 35 [2022-01-18 07:26:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:26:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 42013 states and 103135 transitions. [2022-01-18 07:26:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) [2022-01-18 07:26:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42013 states and 103135 transitions. [2022-01-18 07:26:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:26:28,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:26:28,690 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:26:28,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 07:26:28,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:28,890 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 07:26:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:26:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1472113377, now seen corresponding path program 57 times [2022-01-18 07:26:28,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:26:28,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086160508] [2022-01-18 07:26:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:26:28,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:26:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:26:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:26:29,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:26:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086160508] [2022-01-18 07:26:29,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086160508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:26:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425983797] [2022-01-18 07:26:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:26:29,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:26:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:26:29,203 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) [2022-01-18 07:26:29,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 07:26:29,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-18 07:26:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:26:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 07:26:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:26:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:26:30,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:26:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:26:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425983797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:26:32,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:26:32,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-01-18 07:26:32,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855836127] [2022-01-18 07:26:32,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:26:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 07:26:32,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:26:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 07:26:32,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1687, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 07:26:32,257 INFO L87 Difference]: Start difference. First operand 42013 states and 103135 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 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) Received shutdown request... [2022-01-18 07:26:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 07:26:45,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 49 SyntacticMatches, 14 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10725 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5144, Invalid=21262, Unknown=0, NotChecked=0, Total=26406 [2022-01-18 07:26:45,940 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 642 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 07:26:45,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 37 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1078 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-01-18 07:26:45,941 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 07:26:45,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 07:26:45,959 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:26:45,963 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:26:46,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 07:26:46,142 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (42013states) and FLOYD_HOARE automaton (currently 122 states, 46 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. [2022-01-18 07:26:46,143 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 07:26:46,143 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 07:26:46,145 INFO L732 BasicCegarLoop]: Path program histogram: [57, 1, 1] [2022-01-18 07:26:46,147 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:26:46,147 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:26:46,149 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:26:46 BasicIcfg [2022-01-18 07:26:46,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:26:46,154 INFO L158 Benchmark]: Toolchain (without parser) took 718527.21ms. Allocated memory was 331.4MB in the beginning and 2.0GB in the end (delta: 1.6GB). Free memory was 290.5MB in the beginning and 665.1MB in the end (delta: -374.6MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2022-01-18 07:26:46,154 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 331.4MB. Free memory is still 291.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:26:46,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.08ms. Allocated memory is still 331.4MB. Free memory was 290.5MB in the beginning and 288.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:26:46,154 INFO L158 Benchmark]: Boogie Preprocessor took 16.76ms. Allocated memory is still 331.4MB. Free memory was 288.9MB in the beginning and 288.0MB in the end (delta: 952.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:26:46,154 INFO L158 Benchmark]: RCFGBuilder took 200.65ms. Allocated memory is still 331.4MB. Free memory was 288.0MB in the beginning and 279.0MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 07:26:46,156 INFO L158 Benchmark]: TraceAbstraction took 718276.40ms. Allocated memory was 331.4MB in the beginning and 2.0GB in the end (delta: 1.6GB). Free memory was 278.5MB in the beginning and 665.1MB in the end (delta: -386.6MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2022-01-18 07:26:46,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 331.4MB. Free memory is still 291.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.08ms. Allocated memory is still 331.4MB. Free memory was 290.5MB in the beginning and 288.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.76ms. Allocated memory is still 331.4MB. Free memory was 288.9MB in the beginning and 288.0MB in the end (delta: 952.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 200.65ms. Allocated memory is still 331.4MB. Free memory was 288.0MB in the beginning and 279.0MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 718276.40ms. Allocated memory was 331.4MB in the beginning and 2.0GB in the end (delta: 1.6GB). Free memory was 278.5MB in the beginning and 665.1MB in the end (delta: -386.6MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (42013states) and FLOYD_HOARE automaton (currently 122 states, 46 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (42013states) and FLOYD_HOARE automaton (currently 122 states, 46 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (42013states) and FLOYD_HOARE automaton (currently 122 states, 46 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 163 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 718.2s, OverallIterations: 59, TraceHistogramMax: 5, PathProgramHistogramMax: 57, EmptinessCheckTime: 0.6s, AutomataDifference: 604.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38067 SdHoareTripleChecker+Valid, 46.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38067 mSDsluCounter, 18693 SdHoareTripleChecker+Invalid, 39.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12116 IncrementalHoareTripleChecker+Unchecked, 35638 mSDsCounter, 14132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 87226 IncrementalHoareTripleChecker+Invalid, 113474 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14132 mSolverCounterUnsat, 1098 mSDtfsCounter, 87226 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11388 GetRequests, 2323 SyntacticMatches, 344 SemanticMatches, 8720 ConstructedPredicates, 0 IntricatePredicates, 14 DeprecatedPredicates, 748121 ImplicationChecksByTransitivity, 580.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42013occurred in iteration=58, InterpolantAutomatonStates: 7001, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.4s AutomataMinimizationTime, 58 MinimizatonAttempts, 208201 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 88.9s InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3478 NumberOfCodeBlocksAsserted, 255 NumberOfCheckSat, 5028 ConstructedInterpolants, 87 QuantifiedInterpolants, 93601 SizeOfPredicates, 481 NumberOfNonLiveVariables, 3823 ConjunctsInSsa, 1471 ConjunctsInUnsatCore, 173 InterpolantComputations, 2 PerfectInterpolantSequences, 403/5383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown